examples/migration: add payment entity (#3876)

examples/migration/ent/card.go

@@ -35,9 +35,11 @@ type Card struct {
 type CardEdges struct {
 	// Owner holds the value of the owner edge.
 	Owner *User `json:"owner,omitempty"`
+	// Payments holds the value of the payments edge.
+	Payments []*Payment `json:"payments,omitempty"`
 	// loadedTypes holds the information for reporting if a
 	// type was loaded (or requested) in eager-loading or not.
-	loadedTypes [1]bool
+	loadedTypes [2]bool
 }
 
 // OwnerOrErr returns the Owner value or an error if the edge
@@ -53,6 +55,15 @@ func (e CardEdges) OwnerOrErr() (*User, error) {
 	return nil, &NotLoadedError{edge: "owner"}
 }
 
+// PaymentsOrErr returns the Payments value or an error if the edge
+// was not loaded in eager-loading.
+func (e CardEdges) PaymentsOrErr() ([]*Payment, error) {
+	if e.loadedTypes[1] {
+		return e.Payments, nil
+	}
+	return nil, &NotLoadedError{edge: "payments"}
+}
+
 // scanValues returns the types for scanning values from sql.Rows.
 func (*Card) scanValues(columns []string) ([]any, error) {
 	values := make([]any, len(columns))
@@ -113,6 +124,11 @@ func (c *Card) QueryOwner() *UserQuery {
 	return NewCardClient(c.config).QueryOwner(c)
 }
 
+// QueryPayments queries the "payments" edge of the Card entity.
+func (c *Card) QueryPayments() *PaymentQuery {
+	return NewCardClient(c.config).QueryPayments(c)
+}
+
 // Update returns a builder for updating this Card.
 // Note that you need to call Card.Unwrap() before calling this method if this Card
 // was returned from a transaction, and the transaction was committed or rolled back.

examples/migration/ent/card/card.go

@@ -22,6 +22,8 @@ const (
 	FieldOwnerID = "owner_id"
 	// EdgeOwner holds the string denoting the owner edge name in mutations.
 	EdgeOwner = "owner"
+	// EdgePayments holds the string denoting the payments edge name in mutations.
+	EdgePayments = "payments"
 	// Table holds the table name of the card in the database.
 	Table = "cards"
 	// OwnerTable is the table that holds the owner relation/edge.
@@ -31,6 +33,13 @@ const (
 	OwnerInverseTable = "users"
 	// OwnerColumn is the table column denoting the owner relation/edge.
 	OwnerColumn = "owner_id"
+	// PaymentsTable is the table that holds the payments relation/edge.
+	PaymentsTable = "payments"
+	// PaymentsInverseTable is the table name for the Payment entity.
+	// It exists in this package in order to avoid circular dependency with the "payment" package.
+	PaymentsInverseTable = "payments"
+	// PaymentsColumn is the table column denoting the payments relation/edge.
+	PaymentsColumn = "card_id"
 )
 
 // Columns holds all SQL columns for card fields.
@@ -79,6 +88,20 @@ func ByOwnerField(field string, opts ...sql.OrderTermOption) OrderOption {
 		sqlgraph.OrderByNeighborTerms(s, newOwnerStep(), sql.OrderByField(field, opts...))
 	}
 }
+
+// ByPaymentsCount orders the results by payments count.
+func ByPaymentsCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newPaymentsStep(), opts...)
+	}
+}
+
+// ByPayments orders the results by payments terms.
+func ByPayments(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newPaymentsStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
 func newOwnerStep() *sqlgraph.Step {
 	return sqlgraph.NewStep(
 		sqlgraph.From(Table, FieldID),
@@ -86,3 +109,10 @@ func newOwnerStep() *sqlgraph.Step {
 		sqlgraph.Edge(sqlgraph.M2O, true, OwnerTable, OwnerColumn),
 	)
 }
+func newPaymentsStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(PaymentsInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.O2M, false, PaymentsTable, PaymentsColumn),
+	)
+}

examples/migration/ent/card/where.go

@@ -175,6 +175,29 @@ func HasOwnerWith(preds ...predicate.User) predicate.Card {
 	})
 }
 
+// HasPayments applies the HasEdge predicate on the "payments" edge.
+func HasPayments() predicate.Card {
+	return predicate.Card(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, PaymentsTable, PaymentsColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasPaymentsWith applies the HasEdge predicate on the "payments" edge with a given conditions (other predicates).
+func HasPaymentsWith(preds ...predicate.Payment) predicate.Card {
+	return predicate.Card(func(s *sql.Selector) {
+		step := newPaymentsStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
 // And groups predicates with the AND operator between them.
 func And(predicates ...predicate.Card) predicate.Card {
 	return predicate.Card(sql.AndPredicates(predicates...))

examples/migration/ent/card_create.go

@@ -13,6 +13,7 @@ import (
 
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/user"
 	"entgo.io/ent/schema/field"
 )
@@ -49,6 +50,21 @@ func (cc *CardCreate) SetOwner(u *User) *CardCreate {
 	return cc.SetOwnerID(u.ID)
 }
 
+// AddPaymentIDs adds the "payments" edge to the Payment entity by IDs.
+func (cc *CardCreate) AddPaymentIDs(ids ...int) *CardCreate {
+	cc.mutation.AddPaymentIDs(ids...)
+	return cc
+}
+
+// AddPayments adds the "payments" edges to the Payment entity.
+func (cc *CardCreate) AddPayments(p ...*Payment) *CardCreate {
+	ids := make([]int, len(p))
+	for i := range p {
+		ids[i] = p[i].ID
+	}
+	return cc.AddPaymentIDs(ids...)
+}
+
 // Mutation returns the CardMutation object of the builder.
 func (cc *CardCreate) Mutation() *CardMutation {
 	return cc.mutation
@@ -148,6 +164,22 @@ func (cc *CardCreate) createSpec() (*Card, *sqlgraph.CreateSpec) {
 		_node.OwnerID = nodes[0]
 		_spec.Edges = append(_spec.Edges, edge)
 	}
+	if nodes := cc.mutation.PaymentsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges = append(_spec.Edges, edge)
+	}
 	return _node, _spec
 }
 

examples/migration/ent/card_query.go

@@ -8,12 +8,14 @@ package ent
 
 import (
 	"context"
+	"database/sql/driver"
 	"fmt"
 	"math"
 
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/predicate"
 	"entgo.io/ent/examples/migration/ent/user"
 	"entgo.io/ent/schema/field"
@@ -22,11 +24,12 @@ import (
 // CardQuery is the builder for querying Card entities.
 type CardQuery struct {
 	config
-	ctx        *QueryContext
-	order      []card.OrderOption
-	inters     []Interceptor
-	predicates []predicate.Card
-	withOwner  *UserQuery
+	ctx          *QueryContext
+	order        []card.OrderOption
+	inters       []Interceptor
+	predicates   []predicate.Card
+	withOwner    *UserQuery
+	withPayments *PaymentQuery
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -85,6 +88,28 @@ func (cq *CardQuery) QueryOwner() *UserQuery {
 	return query
 }
 
+// QueryPayments chains the current query on the "payments" edge.
+func (cq *CardQuery) QueryPayments() *PaymentQuery {
+	query := (&PaymentClient{config: cq.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := cq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := cq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(card.Table, card.FieldID, selector),
+			sqlgraph.To(payment.Table, payment.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, card.PaymentsTable, card.PaymentsColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(cq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
 // First returns the first Card entity from the query.
 // Returns a *NotFoundError when no Card was found.
 func (cq *CardQuery) First(ctx context.Context) (*Card, error) {
@@ -272,12 +297,13 @@ func (cq *CardQuery) Clone() *CardQuery {
 		return nil
 	}
 	return &CardQuery{
-		config:     cq.config,
-		ctx:        cq.ctx.Clone(),
-		order:      append([]card.OrderOption{}, cq.order...),
-		inters:     append([]Interceptor{}, cq.inters...),
-		predicates: append([]predicate.Card{}, cq.predicates...),
-		withOwner:  cq.withOwner.Clone(),
+		config:       cq.config,
+		ctx:          cq.ctx.Clone(),
+		order:        append([]card.OrderOption{}, cq.order...),
+		inters:       append([]Interceptor{}, cq.inters...),
+		predicates:   append([]predicate.Card{}, cq.predicates...),
+		withOwner:    cq.withOwner.Clone(),
+		withPayments: cq.withPayments.Clone(),
 		// clone intermediate query.
 		sql:  cq.sql.Clone(),
 		path: cq.path,
@@ -295,6 +321,17 @@ func (cq *CardQuery) WithOwner(opts ...func(*UserQuery)) *CardQuery {
 	return cq
 }
 
+// WithPayments tells the query-builder to eager-load the nodes that are connected to
+// the "payments" edge. The optional arguments are used to configure the query builder of the edge.
+func (cq *CardQuery) WithPayments(opts ...func(*PaymentQuery)) *CardQuery {
+	query := (&PaymentClient{config: cq.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	cq.withPayments = query
+	return cq
+}
+
 // GroupBy is used to group vertices by one or more fields/columns.
 // It is often used with aggregate functions, like: count, max, mean, min, sum.
 //
@@ -373,8 +410,9 @@ func (cq *CardQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Card, e
 	var (
 		nodes       = []*Card{}
 		_spec       = cq.querySpec()
-		loadedTypes = [1]bool{
+		loadedTypes = [2]bool{
 			cq.withOwner != nil,
+			cq.withPayments != nil,
 		}
 	)
 	_spec.ScanValues = func(columns []string) ([]any, error) {
@@ -401,6 +439,13 @@ func (cq *CardQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Card, e
 			return nil, err
 		}
 	}
+	if query := cq.withPayments; query != nil {
+		if err := cq.loadPayments(ctx, query, nodes,
+			func(n *Card) { n.Edges.Payments = []*Payment{} },
+			func(n *Card, e *Payment) { n.Edges.Payments = append(n.Edges.Payments, e) }); err != nil {
+			return nil, err
+		}
+	}
 	return nodes, nil
 }
 
@@ -433,6 +478,36 @@ func (cq *CardQuery) loadOwner(ctx context.Context, query *UserQuery, nodes []*C
 	}
 	return nil
 }
+func (cq *CardQuery) loadPayments(ctx context.Context, query *PaymentQuery, nodes []*Card, init func(*Card), assign func(*Card, *Payment)) error {
+	fks := make([]driver.Value, 0, len(nodes))
+	nodeids := make(map[int]*Card)
+	for i := range nodes {
+		fks = append(fks, nodes[i].ID)
+		nodeids[nodes[i].ID] = nodes[i]
+		if init != nil {
+			init(nodes[i])
+		}
+	}
+	if len(query.ctx.Fields) > 0 {
+		query.ctx.AppendFieldOnce(payment.FieldCardID)
+	}
+	query.Where(predicate.Payment(func(s *sql.Selector) {
+		s.Where(sql.InValues(s.C(card.PaymentsColumn), fks...))
+	}))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		fk := n.CardID
+		node, ok := nodeids[fk]
+		if !ok {
+			return fmt.Errorf(`unexpected referenced foreign-key "card_id" returned %v for node %v`, fk, n.ID)
+		}
+		assign(node, n)
+	}
+	return nil
+}
 
 func (cq *CardQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := cq.querySpec()

examples/migration/ent/card_update.go

@@ -14,6 +14,7 @@ import (
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/predicate"
 	"entgo.io/ent/examples/migration/ent/user"
 	"entgo.io/ent/schema/field"
@@ -65,6 +66,21 @@ func (cu *CardUpdate) SetOwner(u *User) *CardUpdate {
 	return cu.SetOwnerID(u.ID)
 }
 
+// AddPaymentIDs adds the "payments" edge to the Payment entity by IDs.
+func (cu *CardUpdate) AddPaymentIDs(ids ...int) *CardUpdate {
+	cu.mutation.AddPaymentIDs(ids...)
+	return cu
+}
+
+// AddPayments adds the "payments" edges to the Payment entity.
+func (cu *CardUpdate) AddPayments(p ...*Payment) *CardUpdate {
+	ids := make([]int, len(p))
+	for i := range p {
+		ids[i] = p[i].ID
+	}
+	return cu.AddPaymentIDs(ids...)
+}
+
 // Mutation returns the CardMutation object of the builder.
 func (cu *CardUpdate) Mutation() *CardMutation {
 	return cu.mutation
@@ -76,6 +92,27 @@ func (cu *CardUpdate) ClearOwner() *CardUpdate {
 	return cu
 }
 
+// ClearPayments clears all "payments" edges to the Payment entity.
+func (cu *CardUpdate) ClearPayments() *CardUpdate {
+	cu.mutation.ClearPayments()
+	return cu
+}
+
+// RemovePaymentIDs removes the "payments" edge to Payment entities by IDs.
+func (cu *CardUpdate) RemovePaymentIDs(ids ...int) *CardUpdate {
+	cu.mutation.RemovePaymentIDs(ids...)
+	return cu
+}
+
+// RemovePayments removes "payments" edges to Payment entities.
+func (cu *CardUpdate) RemovePayments(p ...*Payment) *CardUpdate {
+	ids := make([]int, len(p))
+	for i := range p {
+		ids[i] = p[i].ID
+	}
+	return cu.RemovePaymentIDs(ids...)
+}
+
 // Save executes the query and returns the number of nodes affected by the update operation.
 func (cu *CardUpdate) Save(ctx context.Context) (int, error) {
 	return withHooks(ctx, cu.sqlSave, cu.mutation, cu.hooks)
@@ -155,6 +192,51 @@ func (cu *CardUpdate) sqlSave(ctx context.Context) (n int, err error) {
 		}
 		_spec.Edges.Add = append(_spec.Edges.Add, edge)
 	}
+	if cu.mutation.PaymentsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := cu.mutation.RemovedPaymentsIDs(); len(nodes) > 0 && !cu.mutation.PaymentsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := cu.mutation.PaymentsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
 	if n, err = sqlgraph.UpdateNodes(ctx, cu.driver, _spec); err != nil {
 		if _, ok := err.(*sqlgraph.NotFoundError); ok {
 			err = &NotFoundError{card.Label}
@@ -208,6 +290,21 @@ func (cuo *CardUpdateOne) SetOwner(u *User) *CardUpdateOne {
 	return cuo.SetOwnerID(u.ID)
 }
 
+// AddPaymentIDs adds the "payments" edge to the Payment entity by IDs.
+func (cuo *CardUpdateOne) AddPaymentIDs(ids ...int) *CardUpdateOne {
+	cuo.mutation.AddPaymentIDs(ids...)
+	return cuo
+}
+
+// AddPayments adds the "payments" edges to the Payment entity.
+func (cuo *CardUpdateOne) AddPayments(p ...*Payment) *CardUpdateOne {
+	ids := make([]int, len(p))
+	for i := range p {
+		ids[i] = p[i].ID
+	}
+	return cuo.AddPaymentIDs(ids...)
+}
+
 // Mutation returns the CardMutation object of the builder.
 func (cuo *CardUpdateOne) Mutation() *CardMutation {
 	return cuo.mutation
@@ -219,6 +316,27 @@ func (cuo *CardUpdateOne) ClearOwner() *CardUpdateOne {
 	return cuo
 }
 
+// ClearPayments clears all "payments" edges to the Payment entity.
+func (cuo *CardUpdateOne) ClearPayments() *CardUpdateOne {
+	cuo.mutation.ClearPayments()
+	return cuo
+}
+
+// RemovePaymentIDs removes the "payments" edge to Payment entities by IDs.
+func (cuo *CardUpdateOne) RemovePaymentIDs(ids ...int) *CardUpdateOne {
+	cuo.mutation.RemovePaymentIDs(ids...)
+	return cuo
+}
+
+// RemovePayments removes "payments" edges to Payment entities.
+func (cuo *CardUpdateOne) RemovePayments(p ...*Payment) *CardUpdateOne {
+	ids := make([]int, len(p))
+	for i := range p {
+		ids[i] = p[i].ID
+	}
+	return cuo.RemovePaymentIDs(ids...)
+}
+
 // Where appends a list predicates to the CardUpdate builder.
 func (cuo *CardUpdateOne) Where(ps ...predicate.Card) *CardUpdateOne {
 	cuo.mutation.Where(ps...)
@@ -328,6 +446,51 @@ func (cuo *CardUpdateOne) sqlSave(ctx context.Context) (_node *Card, err error)
 		}
 		_spec.Edges.Add = append(_spec.Edges.Add, edge)
 	}
+	if cuo.mutation.PaymentsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := cuo.mutation.RemovedPaymentsIDs(); len(nodes) > 0 && !cuo.mutation.PaymentsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := cuo.mutation.PaymentsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   card.PaymentsTable,
+			Columns: []string{card.PaymentsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
 	_node = &Card{config: cuo.config}
 	_spec.Assign = _node.assignValues
 	_spec.ScanValues = _node.scanValues

examples/migration/ent/client.go

@@ -21,6 +21,7 @@ import (
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/pet"
 	"entgo.io/ent/examples/migration/ent/user"
 )
@@ -32,6 +33,8 @@ type Client struct {
 	Schema *migrate.Schema
 	// Card is the client for interacting with the Card builders.
 	Card *CardClient
+	// Payment is the client for interacting with the Payment builders.
+	Payment *PaymentClient
 	// Pet is the client for interacting with the Pet builders.
 	Pet *PetClient
 	// User is the client for interacting with the User builders.
@@ -48,6 +51,7 @@ func NewClient(opts ...Option) *Client {
 func (c *Client) init() {
 	c.Schema = migrate.NewSchema(c.driver)
 	c.Card = NewCardClient(c.config)
+	c.Payment = NewPaymentClient(c.config)
 	c.Pet = NewPetClient(c.config)
 	c.User = NewUserClient(c.config)
 }
@@ -140,11 +144,12 @@ func (c *Client) Tx(ctx context.Context) (*Tx, error) {
 	cfg := c.config
 	cfg.driver = tx
 	return &Tx{
-		ctx:    ctx,
-		config: cfg,
-		Card:   NewCardClient(cfg),
-		Pet:    NewPetClient(cfg),
-		User:   NewUserClient(cfg),
+		ctx:     ctx,
+		config:  cfg,
+		Card:    NewCardClient(cfg),
+		Payment: NewPaymentClient(cfg),
+		Pet:     NewPetClient(cfg),
+		User:    NewUserClient(cfg),
 	}, nil
 }
 
@@ -162,11 +167,12 @@ func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)
 	cfg := c.config
 	cfg.driver = &txDriver{tx: tx, drv: c.driver}
 	return &Tx{
-		ctx:    ctx,
-		config: cfg,
-		Card:   NewCardClient(cfg),
-		Pet:    NewPetClient(cfg),
-		User:   NewUserClient(cfg),
+		ctx:     ctx,
+		config:  cfg,
+		Card:    NewCardClient(cfg),
+		Payment: NewPaymentClient(cfg),
+		Pet:     NewPetClient(cfg),
+		User:    NewUserClient(cfg),
 	}, nil
 }
 
@@ -196,6 +202,7 @@ func (c *Client) Close() error {
 // In order to add hooks to a specific client, call: `client.Node.Use(...)`.
 func (c *Client) Use(hooks ...Hook) {
 	c.Card.Use(hooks...)
+	c.Payment.Use(hooks...)
 	c.Pet.Use(hooks...)
 	c.User.Use(hooks...)
 }
@@ -204,6 +211,7 @@ func (c *Client) Use(hooks ...Hook) {
 // In order to add interceptors to a specific client, call: `client.Node.Intercept(...)`.
 func (c *Client) Intercept(interceptors ...Interceptor) {
 	c.Card.Intercept(interceptors...)
+	c.Payment.Intercept(interceptors...)
 	c.Pet.Intercept(interceptors...)
 	c.User.Intercept(interceptors...)
 }
@@ -213,6 +221,8 @@ func (c *Client) Mutate(ctx context.Context, m Mutation) (Value, error) {
 	switch m := m.(type) {
 	case *CardMutation:
 		return c.Card.mutate(ctx, m)
+	case *PaymentMutation:
+		return c.Payment.mutate(ctx, m)
 	case *PetMutation:
 		return c.Pet.mutate(ctx, m)
 	case *UserMutation:
@@ -346,6 +356,22 @@ func (c *CardClient) QueryOwner(ca *Card) *UserQuery {
 	return query
 }
 
+// QueryPayments queries the payments edge of a Card.
+func (c *CardClient) QueryPayments(ca *Card) *PaymentQuery {
+	query := (&PaymentClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := ca.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(card.Table, card.FieldID, id),
+			sqlgraph.To(payment.Table, payment.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, card.PaymentsTable, card.PaymentsColumn),
+		)
+		fromV = sqlgraph.Neighbors(ca.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
 // Hooks returns the client hooks.
 func (c *CardClient) Hooks() []Hook {
 	return c.hooks.Card
@@ -371,6 +397,155 @@ func (c *CardClient) mutate(ctx context.Context, m *CardMutation) (Value, error)
 	}
 }
 
+// PaymentClient is a client for the Payment schema.
+type PaymentClient struct {
+	config
+}
+
+// NewPaymentClient returns a client for the Payment from the given config.
+func NewPaymentClient(c config) *PaymentClient {
+	return &PaymentClient{config: c}
+}
+
+// Use adds a list of mutation hooks to the hooks stack.
+// A call to `Use(f, g, h)` equals to `payment.Hooks(f(g(h())))`.
+func (c *PaymentClient) Use(hooks ...Hook) {
+	c.hooks.Payment = append(c.hooks.Payment, hooks...)
+}
+
+// Intercept adds a list of query interceptors to the interceptors stack.
+// A call to `Intercept(f, g, h)` equals to `payment.Intercept(f(g(h())))`.
+func (c *PaymentClient) Intercept(interceptors ...Interceptor) {
+	c.inters.Payment = append(c.inters.Payment, interceptors...)
+}
+
+// Create returns a builder for creating a Payment entity.
+func (c *PaymentClient) Create() *PaymentCreate {
+	mutation := newPaymentMutation(c.config, OpCreate)
+	return &PaymentCreate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// CreateBulk returns a builder for creating a bulk of Payment entities.
+func (c *PaymentClient) CreateBulk(builders ...*PaymentCreate) *PaymentCreateBulk {
+	return &PaymentCreateBulk{config: c.config, builders: builders}
+}
+
+// MapCreateBulk creates a bulk creation builder from the given slice. For each item in the slice, the function creates
+// a builder and applies setFunc on it.
+func (c *PaymentClient) MapCreateBulk(slice any, setFunc func(*PaymentCreate, int)) *PaymentCreateBulk {
+	rv := reflect.ValueOf(slice)
+	if rv.Kind() != reflect.Slice {
+		return &PaymentCreateBulk{err: fmt.Errorf("calling to PaymentClient.MapCreateBulk with wrong type %T, need slice", slice)}
+	}
+	builders := make([]*PaymentCreate, rv.Len())
+	for i := 0; i < rv.Len(); i++ {
+		builders[i] = c.Create()
+		setFunc(builders[i], i)
+	}
+	return &PaymentCreateBulk{config: c.config, builders: builders}
+}
+
+// Update returns an update builder for Payment.
+func (c *PaymentClient) Update() *PaymentUpdate {
+	mutation := newPaymentMutation(c.config, OpUpdate)
+	return &PaymentUpdate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOne returns an update builder for the given entity.
+func (c *PaymentClient) UpdateOne(pa *Payment) *PaymentUpdateOne {
+	mutation := newPaymentMutation(c.config, OpUpdateOne, withPayment(pa))
+	return &PaymentUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOneID returns an update builder for the given id.
+func (c *PaymentClient) UpdateOneID(id int) *PaymentUpdateOne {
+	mutation := newPaymentMutation(c.config, OpUpdateOne, withPaymentID(id))
+	return &PaymentUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// Delete returns a delete builder for Payment.
+func (c *PaymentClient) Delete() *PaymentDelete {
+	mutation := newPaymentMutation(c.config, OpDelete)
+	return &PaymentDelete{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// DeleteOne returns a builder for deleting the given entity.
+func (c *PaymentClient) DeleteOne(pa *Payment) *PaymentDeleteOne {
+	return c.DeleteOneID(pa.ID)
+}
+
+// DeleteOneID returns a builder for deleting the given entity by its id.
+func (c *PaymentClient) DeleteOneID(id int) *PaymentDeleteOne {
+	builder := c.Delete().Where(payment.ID(id))
+	builder.mutation.id = &id
+	builder.mutation.op = OpDeleteOne
+	return &PaymentDeleteOne{builder}
+}
+
+// Query returns a query builder for Payment.
+func (c *PaymentClient) Query() *PaymentQuery {
+	return &PaymentQuery{
+		config: c.config,
+		ctx:    &QueryContext{Type: TypePayment},
+		inters: c.Interceptors(),
+	}
+}
+
+// Get returns a Payment entity by its id.
+func (c *PaymentClient) Get(ctx context.Context, id int) (*Payment, error) {
+	return c.Query().Where(payment.ID(id)).Only(ctx)
+}
+
+// GetX is like Get, but panics if an error occurs.
+func (c *PaymentClient) GetX(ctx context.Context, id int) *Payment {
+	obj, err := c.Get(ctx, id)
+	if err != nil {
+		panic(err)
+	}
+	return obj
+}
+
+// QueryCard queries the card edge of a Payment.
+func (c *PaymentClient) QueryCard(pa *Payment) *CardQuery {
+	query := (&CardClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := pa.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(payment.Table, payment.FieldID, id),
+			sqlgraph.To(card.Table, card.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, payment.CardTable, payment.CardColumn),
+		)
+		fromV = sqlgraph.Neighbors(pa.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// Hooks returns the client hooks.
+func (c *PaymentClient) Hooks() []Hook {
+	return c.hooks.Payment
+}
+
+// Interceptors returns the client interceptors.
+func (c *PaymentClient) Interceptors() []Interceptor {
+	return c.inters.Payment
+}
+
+func (c *PaymentClient) mutate(ctx context.Context, m *PaymentMutation) (Value, error) {
+	switch m.Op() {
+	case OpCreate:
+		return (&PaymentCreate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdate:
+		return (&PaymentUpdate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdateOne:
+		return (&PaymentUpdateOne{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpDelete, OpDeleteOne:
+		return (&PaymentDelete{config: c.config, hooks: c.Hooks(), mutation: m}).Exec(ctx)
+	default:
+		return nil, fmt.Errorf("ent: unknown Payment mutation op: %q", m.Op())
+	}
+}
+
 // PetClient is a client for the Pet schema.
 type PetClient struct {
 	config
@@ -688,9 +863,9 @@ func (c *UserClient) mutate(ctx context.Context, m *UserMutation) (Value, error)
 // hooks and interceptors per client, for fast access.
 type (
 	hooks struct {
-		Card, Pet, User []ent.Hook
+		Card, Payment, Pet, User []ent.Hook
 	}
 	inters struct {
-		Card, Pet, User []ent.Interceptor
+		Card, Payment, Pet, User []ent.Interceptor
 	}
 )

examples/migration/ent/ent.go

@@ -17,6 +17,7 @@ import (
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/pet"
 	"entgo.io/ent/examples/migration/ent/user"
 )
@@ -79,9 +80,10 @@ var (
 func checkColumn(table, column string) error {
 	initCheck.Do(func() {
 		columnCheck = sql.NewColumnCheck(map[string]func(string) bool{
-			card.Table: card.ValidColumn,
-			pet.Table:  pet.ValidColumn,
-			user.Table: user.ValidColumn,
+			card.Table:    card.ValidColumn,
+			payment.Table: payment.ValidColumn,
+			pet.Table:     pet.ValidColumn,
+			user.Table:    user.ValidColumn,
 		})
 	})
 	return columnCheck(table, column)

examples/migration/ent/hook/hook.go

@@ -25,6 +25,18 @@ func (f CardFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error)
 	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.CardMutation", m)
 }
 
+// The PaymentFunc type is an adapter to allow the use of ordinary
+// function as Payment mutator.
+type PaymentFunc func(context.Context, *ent.PaymentMutation) (ent.Value, error)
+
+// Mutate calls f(ctx, m).
+func (f PaymentFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
+	if mv, ok := m.(*ent.PaymentMutation); ok {
+		return f(ctx, mv)
+	}
+	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.PaymentMutation", m)
+}
+
 // The PetFunc type is an adapter to allow the use of ordinary
 // function as Pet mutator.
 type PetFunc func(context.Context, *ent.PetMutation) (ent.Value, error)

examples/migration/ent/migrate/migrations/20231231101555_add_payment.sql

@@ -0,0 +1,2 @@
+-- Create "payments" table
+CREATE TABLE `payments` (`id` bigint NOT NULL AUTO_INCREMENT, `amount` double NOT NULL, `currency` enum('USD','ILS') NOT NULL, `time` timestamp NOT NULL, `description` varchar(255) NOT NULL, `status` enum('pending','completed','failed') NOT NULL, `card_id` bigint NOT NULL, PRIMARY KEY (`id`), INDEX `payment_status_time` (`status`, `time`), INDEX `payments_cards_payments` (`card_id`), CONSTRAINT `payments_cards_payments` FOREIGN KEY (`card_id`) REFERENCES `cards` (`id`) ON UPDATE NO ACTION ON DELETE NO ACTION, CONSTRAINT `amount_positive` CHECK (`amount` > 0)) CHARSET utf8mb4 COLLATE utf8mb4_bin;

examples/migration/ent/migrate/migrations/atlas.sum

@@ -1,4 +1,4 @@
-h1:bWNwoQD451P0fV9kAd46VfreaOAJdrpDXYJ9xmgATtw=
+h1:BZ/m+1lip4UqNLaufWxuuYirZn+gqq4srr3X5JpGuOY=
 20221114082343_create_users.sql h1:EeOPKbOeYUHO830P1MCXKUsxT3wLk/hSgcpT9GzlGZQ=
 20221114090322_add_age.sql h1:weRCTqS5cqKyrvIjGXk7Bn24YUXo0nhLNWD0EZBcaoQ=
 20221114101516_add_name.sql h1:leQgI2JN3URZyujlNzX3gI53MSiTA02MKI/G9cnMu6I=
@@ -7,3 +7,4 @@ h1:bWNwoQD451P0fV9kAd46VfreaOAJdrpDXYJ9xmgATtw=
 20230101214930_default_values.sql h1:W07mGRkz22lrW0dvcChRtRc5b03Kp2CsFAQZvsnb8qs=
 20231231083716_add_card_number.sql h1:sBxY6RlbqEsE8hx6Q/hSuNXfBGvVmZ0OYiZcP8uDNOc=
 20231231091550_add_pet_name.sql h1:80NyHhZ/ZC4Um0j0NLzUpf1UBj4GKvMu678EqkJsFuU=
+20231231101555_add_payment.sql h1:Je16hh6fEWuL5/nbQN5v+MNkC8ruhtTgEcEgkh+Gyyg=

examples/migration/ent/migrate/schema.go

@@ -33,6 +33,37 @@ var (
 			},
 		},
 	}
+	// PaymentsColumns holds the columns for the "payments" table.
+	PaymentsColumns = []*schema.Column{
+		{Name: "id", Type: field.TypeInt, Increment: true},
+		{Name: "amount", Type: field.TypeFloat64},
+		{Name: "currency", Type: field.TypeEnum, Enums: []string{"USD", "ILS"}},
+		{Name: "time", Type: field.TypeTime},
+		{Name: "description", Type: field.TypeString},
+		{Name: "status", Type: field.TypeEnum, Enums: []string{"pending", "completed", "failed"}},
+		{Name: "card_id", Type: field.TypeInt},
+	}
+	// PaymentsTable holds the schema information for the "payments" table.
+	PaymentsTable = &schema.Table{
+		Name:       "payments",
+		Columns:    PaymentsColumns,
+		PrimaryKey: []*schema.Column{PaymentsColumns[0]},
+		ForeignKeys: []*schema.ForeignKey{
+			{
+				Symbol:     "payments_cards_payments",
+				Columns:    []*schema.Column{PaymentsColumns[6]},
+				RefColumns: []*schema.Column{CardsColumns[0]},
+				OnDelete:   schema.NoAction,
+			},
+		},
+		Indexes: []*schema.Index{
+			{
+				Name:    "payment_status_time",
+				Unique:  false,
+				Columns: []*schema.Column{PaymentsColumns[5], PaymentsColumns[3]},
+			},
+		},
+	}
 	// PetsColumns holds the columns for the "pets" table.
 	PetsColumns = []*schema.Column{
 		{Name: "id", Type: field.TypeUUID},
@@ -83,6 +114,7 @@ var (
 	// Tables holds all the tables in the schema.
 	Tables = []*schema.Table{
 		CardsTable,
+		PaymentsTable,
 		PetsTable,
 		UsersTable,
 	}
@@ -94,6 +126,11 @@ func init() {
 	CardsTable.Annotation.Checks = map[string]string{
 		"number_length": "(LENGTH(`number`) = 16)",
 	}
+	PaymentsTable.ForeignKeys[0].RefTable = CardsTable
+	PaymentsTable.Annotation = &entsql.Annotation{}
+	PaymentsTable.Annotation.Checks = map[string]string{
+		"amount_positive": "(`amount` > 0)",
+	}
 	PetsTable.ForeignKeys[0].RefTable = PetsTable
 	PetsTable.ForeignKeys[1].RefTable = UsersTable
 	UsersTable.Annotation = &entsql.Annotation{

examples/migration/ent/mutation.go

@@ -11,10 +11,12 @@ import (
 	"errors"
 	"fmt"
 	"sync"
+	"time"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/pet"
 	"entgo.io/ent/examples/migration/ent/predicate"
 	"entgo.io/ent/examples/migration/ent/user"
@@ -30,24 +32,28 @@ const (
 	OpUpdateOne = ent.OpUpdateOne
 
 	// Node types.
-	TypeCard = "Card"
-	TypePet  = "Pet"
-	TypeUser = "User"
+	TypeCard    = "Card"
+	TypePayment = "Payment"
+	TypePet     = "Pet"
+	TypeUser    = "User"
 )
 
 // CardMutation represents an operation that mutates the Card nodes in the graph.
 type CardMutation struct {
 	config
-	op            Op
-	typ           string
-	id            *int
-	number        *string
-	clearedFields map[string]struct{}
-	owner         *int
-	clearedowner  bool
-	done          bool
-	oldValue      func(context.Context) (*Card, error)
-	predicates    []predicate.Card
+	op              Op
+	typ             string
+	id              *int
+	number          *string
+	clearedFields   map[string]struct{}
+	owner           *int
+	clearedowner    bool
+	payments        map[int]struct{}
+	removedpayments map[int]struct{}
+	clearedpayments bool
+	done            bool
+	oldValue        func(context.Context) (*Card, error)
+	predicates      []predicate.Card
 }
 
 var _ ent.Mutation = (*CardMutation)(nil)
@@ -247,6 +253,60 @@ func (m *CardMutation) ResetOwner() {
 	m.clearedowner = false
 }
 
+// AddPaymentIDs adds the "payments" edge to the Payment entity by ids.
+func (m *CardMutation) AddPaymentIDs(ids ...int) {
+	if m.payments == nil {
+		m.payments = make(map[int]struct{})
+	}
+	for i := range ids {
+		m.payments[ids[i]] = struct{}{}
+	}
+}
+
+// ClearPayments clears the "payments" edge to the Payment entity.
+func (m *CardMutation) ClearPayments() {
+	m.clearedpayments = true
+}
+
+// PaymentsCleared reports if the "payments" edge to the Payment entity was cleared.
+func (m *CardMutation) PaymentsCleared() bool {
+	return m.clearedpayments
+}
+
+// RemovePaymentIDs removes the "payments" edge to the Payment entity by IDs.
+func (m *CardMutation) RemovePaymentIDs(ids ...int) {
+	if m.removedpayments == nil {
+		m.removedpayments = make(map[int]struct{})
+	}
+	for i := range ids {
+		delete(m.payments, ids[i])
+		m.removedpayments[ids[i]] = struct{}{}
+	}
+}
+
+// RemovedPayments returns the removed IDs of the "payments" edge to the Payment entity.
+func (m *CardMutation) RemovedPaymentsIDs() (ids []int) {
+	for id := range m.removedpayments {
+		ids = append(ids, id)
+	}
+	return
+}
+
+// PaymentsIDs returns the "payments" edge IDs in the mutation.
+func (m *CardMutation) PaymentsIDs() (ids []int) {
+	for id := range m.payments {
+		ids = append(ids, id)
+	}
+	return
+}
+
+// ResetPayments resets all changes to the "payments" edge.
+func (m *CardMutation) ResetPayments() {
+	m.payments = nil
+	m.clearedpayments = false
+	m.removedpayments = nil
+}
+
 // Where appends a list predicates to the CardMutation builder.
 func (m *CardMutation) Where(ps ...predicate.Card) {
 	m.predicates = append(m.predicates, ps...)
@@ -400,10 +460,13 @@ func (m *CardMutation) ResetField(name string) error {
 
 // AddedEdges returns all edge names that were set/added in this mutation.
 func (m *CardMutation) AddedEdges() []string {
-	edges := make([]string, 0, 1)
+	edges := make([]string, 0, 2)
 	if m.owner != nil {
 		edges = append(edges, card.EdgeOwner)
 	}
+	if m.payments != nil {
+		edges = append(edges, card.EdgePayments)
+	}
 	return edges
 }
 
@@ -415,28 +478,48 @@ func (m *CardMutation) AddedIDs(name string) []ent.Value {
 		if id := m.owner; id != nil {
 			return []ent.Value{*id}
 		}
+	case card.EdgePayments:
+		ids := make([]ent.Value, 0, len(m.payments))
+		for id := range m.payments {
+			ids = append(ids, id)
+		}
+		return ids
 	}
 	return nil
 }
 
 // RemovedEdges returns all edge names that were removed in this mutation.
 func (m *CardMutation) RemovedEdges() []string {
-	edges := make([]string, 0, 1)
+	edges := make([]string, 0, 2)
+	if m.removedpayments != nil {
+		edges = append(edges, card.EdgePayments)
+	}
 	return edges
 }
 
 // RemovedIDs returns all IDs (to other nodes) that were removed for the edge with
 // the given name in this mutation.
 func (m *CardMutation) RemovedIDs(name string) []ent.Value {
+	switch name {
+	case card.EdgePayments:
+		ids := make([]ent.Value, 0, len(m.removedpayments))
+		for id := range m.removedpayments {
+			ids = append(ids, id)
+		}
+		return ids
+	}
 	return nil
 }
 
 // ClearedEdges returns all edge names that were cleared in this mutation.
 func (m *CardMutation) ClearedEdges() []string {
-	edges := make([]string, 0, 1)
+	edges := make([]string, 0, 2)
 	if m.clearedowner {
 		edges = append(edges, card.EdgeOwner)
 	}
+	if m.clearedpayments {
+		edges = append(edges, card.EdgePayments)
+	}
 	return edges
 }
 
@@ -446,6 +529,8 @@ func (m *CardMutation) EdgeCleared(name string) bool {
 	switch name {
 	case card.EdgeOwner:
 		return m.clearedowner
+	case card.EdgePayments:
+		return m.clearedpayments
 	}
 	return false
 }
@@ -468,10 +553,699 @@ func (m *CardMutation) ResetEdge(name string) error {
 	case card.EdgeOwner:
 		m.ResetOwner()
 		return nil
+	case card.EdgePayments:
+		m.ResetPayments()
+		return nil
 	}
 	return fmt.Errorf("unknown Card edge %s", name)
 }
 
+// PaymentMutation represents an operation that mutates the Payment nodes in the graph.
+type PaymentMutation struct {
+	config
+	op            Op
+	typ           string
+	id            *int
+	amount        *float64
+	addamount     *float64
+	currency      *payment.Currency
+	time          *time.Time
+	description   *string
+	status        *payment.Status
+	clearedFields map[string]struct{}
+	card          *int
+	clearedcard   bool
+	done          bool
+	oldValue      func(context.Context) (*Payment, error)
+	predicates    []predicate.Payment
+}
+
+var _ ent.Mutation = (*PaymentMutation)(nil)
+
+// paymentOption allows management of the mutation configuration using functional options.
+type paymentOption func(*PaymentMutation)
+
+// newPaymentMutation creates new mutation for the Payment entity.
+func newPaymentMutation(c config, op Op, opts ...paymentOption) *PaymentMutation {
+	m := &PaymentMutation{
+		config:        c,
+		op:            op,
+		typ:           TypePayment,
+		clearedFields: make(map[string]struct{}),
+	}
+	for _, opt := range opts {
+		opt(m)
+	}
+	return m
+}
+
+// withPaymentID sets the ID field of the mutation.
+func withPaymentID(id int) paymentOption {
+	return func(m *PaymentMutation) {
+		var (
+			err   error
+			once  sync.Once
+			value *Payment
+		)
+		m.oldValue = func(ctx context.Context) (*Payment, error) {
+			once.Do(func() {
+				if m.done {
+					err = errors.New("querying old values post mutation is not allowed")
+				} else {
+					value, err = m.Client().Payment.Get(ctx, id)
+				}
+			})
+			return value, err
+		}
+		m.id = &id
+	}
+}
+
+// withPayment sets the old Payment of the mutation.
+func withPayment(node *Payment) paymentOption {
+	return func(m *PaymentMutation) {
+		m.oldValue = func(context.Context) (*Payment, error) {
+			return node, nil
+		}
+		m.id = &node.ID
+	}
+}
+
+// Client returns a new `ent.Client` from the mutation. If the mutation was
+// executed in a transaction (ent.Tx), a transactional client is returned.
+func (m PaymentMutation) Client() *Client {
+	client := &Client{config: m.config}
+	client.init()
+	return client
+}
+
+// Tx returns an `ent.Tx` for mutations that were executed in transactions;
+// it returns an error otherwise.
+func (m PaymentMutation) Tx() (*Tx, error) {
+	if _, ok := m.driver.(*txDriver); !ok {
+		return nil, errors.New("ent: mutation is not running in a transaction")
+	}
+	tx := &Tx{config: m.config}
+	tx.init()
+	return tx, nil
+}
+
+// ID returns the ID value in the mutation. Note that the ID is only available
+// if it was provided to the builder or after it was returned from the database.
+func (m *PaymentMutation) ID() (id int, exists bool) {
+	if m.id == nil {
+		return
+	}
+	return *m.id, true
+}
+
+// IDs queries the database and returns the entity ids that match the mutation's predicate.
+// That means, if the mutation is applied within a transaction with an isolation level such
+// as sql.LevelSerializable, the returned ids match the ids of the rows that will be updated
+// or updated by the mutation.
+func (m *PaymentMutation) IDs(ctx context.Context) ([]int, error) {
+	switch {
+	case m.op.Is(OpUpdateOne | OpDeleteOne):
+		id, exists := m.ID()
+		if exists {
+			return []int{id}, nil
+		}
+		fallthrough
+	case m.op.Is(OpUpdate | OpDelete):
+		return m.Client().Payment.Query().Where(m.predicates...).IDs(ctx)
+	default:
+		return nil, fmt.Errorf("IDs is not allowed on %s operations", m.op)
+	}
+}
+
+// SetCardID sets the "card_id" field.
+func (m *PaymentMutation) SetCardID(i int) {
+	m.card = &i
+}
+
+// CardID returns the value of the "card_id" field in the mutation.
+func (m *PaymentMutation) CardID() (r int, exists bool) {
+	v := m.card
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldCardID returns the old "card_id" field's value of the Payment entity.
+// If the Payment object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *PaymentMutation) OldCardID(ctx context.Context) (v int, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldCardID is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldCardID requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldCardID: %w", err)
+	}
+	return oldValue.CardID, nil
+}
+
+// ResetCardID resets all changes to the "card_id" field.
+func (m *PaymentMutation) ResetCardID() {
+	m.card = nil
+}
+
+// SetAmount sets the "amount" field.
+func (m *PaymentMutation) SetAmount(f float64) {
+	m.amount = &f
+	m.addamount = nil
+}
+
+// Amount returns the value of the "amount" field in the mutation.
+func (m *PaymentMutation) Amount() (r float64, exists bool) {
+	v := m.amount
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldAmount returns the old "amount" field's value of the Payment entity.
+// If the Payment object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *PaymentMutation) OldAmount(ctx context.Context) (v float64, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldAmount is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldAmount requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldAmount: %w", err)
+	}
+	return oldValue.Amount, nil
+}
+
+// AddAmount adds f to the "amount" field.
+func (m *PaymentMutation) AddAmount(f float64) {
+	if m.addamount != nil {
+		*m.addamount += f
+	} else {
+		m.addamount = &f
+	}
+}
+
+// AddedAmount returns the value that was added to the "amount" field in this mutation.
+func (m *PaymentMutation) AddedAmount() (r float64, exists bool) {
+	v := m.addamount
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// ResetAmount resets all changes to the "amount" field.
+func (m *PaymentMutation) ResetAmount() {
+	m.amount = nil
+	m.addamount = nil
+}
+
+// SetCurrency sets the "currency" field.
+func (m *PaymentMutation) SetCurrency(pa payment.Currency) {
+	m.currency = &pa
+}
+
+// Currency returns the value of the "currency" field in the mutation.
+func (m *PaymentMutation) Currency() (r payment.Currency, exists bool) {
+	v := m.currency
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldCurrency returns the old "currency" field's value of the Payment entity.
+// If the Payment object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *PaymentMutation) OldCurrency(ctx context.Context) (v payment.Currency, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldCurrency is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldCurrency requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldCurrency: %w", err)
+	}
+	return oldValue.Currency, nil
+}
+
+// ResetCurrency resets all changes to the "currency" field.
+func (m *PaymentMutation) ResetCurrency() {
+	m.currency = nil
+}
+
+// SetTime sets the "time" field.
+func (m *PaymentMutation) SetTime(t time.Time) {
+	m.time = &t
+}
+
+// Time returns the value of the "time" field in the mutation.
+func (m *PaymentMutation) Time() (r time.Time, exists bool) {
+	v := m.time
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldTime returns the old "time" field's value of the Payment entity.
+// If the Payment object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *PaymentMutation) OldTime(ctx context.Context) (v time.Time, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldTime is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldTime requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldTime: %w", err)
+	}
+	return oldValue.Time, nil
+}
+
+// ResetTime resets all changes to the "time" field.
+func (m *PaymentMutation) ResetTime() {
+	m.time = nil
+}
+
+// SetDescription sets the "description" field.
+func (m *PaymentMutation) SetDescription(s string) {
+	m.description = &s
+}
+
+// Description returns the value of the "description" field in the mutation.
+func (m *PaymentMutation) Description() (r string, exists bool) {
+	v := m.description
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldDescription returns the old "description" field's value of the Payment entity.
+// If the Payment object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *PaymentMutation) OldDescription(ctx context.Context) (v string, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldDescription is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldDescription requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldDescription: %w", err)
+	}
+	return oldValue.Description, nil
+}
+
+// ResetDescription resets all changes to the "description" field.
+func (m *PaymentMutation) ResetDescription() {
+	m.description = nil
+}
+
+// SetStatus sets the "status" field.
+func (m *PaymentMutation) SetStatus(pa payment.Status) {
+	m.status = &pa
+}
+
+// Status returns the value of the "status" field in the mutation.
+func (m *PaymentMutation) Status() (r payment.Status, exists bool) {
+	v := m.status
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldStatus returns the old "status" field's value of the Payment entity.
+// If the Payment object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *PaymentMutation) OldStatus(ctx context.Context) (v payment.Status, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldStatus is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldStatus requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldStatus: %w", err)
+	}
+	return oldValue.Status, nil
+}
+
+// ResetStatus resets all changes to the "status" field.
+func (m *PaymentMutation) ResetStatus() {
+	m.status = nil
+}
+
+// ClearCard clears the "card" edge to the Card entity.
+func (m *PaymentMutation) ClearCard() {
+	m.clearedcard = true
+	m.clearedFields[payment.FieldCardID] = struct{}{}
+}
+
+// CardCleared reports if the "card" edge to the Card entity was cleared.
+func (m *PaymentMutation) CardCleared() bool {
+	return m.clearedcard
+}
+
+// CardIDs returns the "card" edge IDs in the mutation.
+// Note that IDs always returns len(IDs) <= 1 for unique edges, and you should use
+// CardID instead. It exists only for internal usage by the builders.
+func (m *PaymentMutation) CardIDs() (ids []int) {
+	if id := m.card; id != nil {
+		ids = append(ids, *id)
+	}
+	return
+}
+
+// ResetCard resets all changes to the "card" edge.
+func (m *PaymentMutation) ResetCard() {
+	m.card = nil
+	m.clearedcard = false
+}
+
+// Where appends a list predicates to the PaymentMutation builder.
+func (m *PaymentMutation) Where(ps ...predicate.Payment) {
+	m.predicates = append(m.predicates, ps...)
+}
+
+// WhereP appends storage-level predicates to the PaymentMutation builder. Using this method,
+// users can use type-assertion to append predicates that do not depend on any generated package.
+func (m *PaymentMutation) WhereP(ps ...func(*sql.Selector)) {
+	p := make([]predicate.Payment, len(ps))
+	for i := range ps {
+		p[i] = ps[i]
+	}
+	m.Where(p...)
+}
+
+// Op returns the operation name.
+func (m *PaymentMutation) Op() Op {
+	return m.op
+}
+
+// SetOp allows setting the mutation operation.
+func (m *PaymentMutation) SetOp(op Op) {
+	m.op = op
+}
+
+// Type returns the node type of this mutation (Payment).
+func (m *PaymentMutation) Type() string {
+	return m.typ
+}
+
+// Fields returns all fields that were changed during this mutation. Note that in
+// order to get all numeric fields that were incremented/decremented, call
+// AddedFields().
+func (m *PaymentMutation) Fields() []string {
+	fields := make([]string, 0, 6)
+	if m.card != nil {
+		fields = append(fields, payment.FieldCardID)
+	}
+	if m.amount != nil {
+		fields = append(fields, payment.FieldAmount)
+	}
+	if m.currency != nil {
+		fields = append(fields, payment.FieldCurrency)
+	}
+	if m.time != nil {
+		fields = append(fields, payment.FieldTime)
+	}
+	if m.description != nil {
+		fields = append(fields, payment.FieldDescription)
+	}
+	if m.status != nil {
+		fields = append(fields, payment.FieldStatus)
+	}
+	return fields
+}
+
+// Field returns the value of a field with the given name. The second boolean
+// return value indicates that this field was not set, or was not defined in the
+// schema.
+func (m *PaymentMutation) Field(name string) (ent.Value, bool) {
+	switch name {
+	case payment.FieldCardID:
+		return m.CardID()
+	case payment.FieldAmount:
+		return m.Amount()
+	case payment.FieldCurrency:
+		return m.Currency()
+	case payment.FieldTime:
+		return m.Time()
+	case payment.FieldDescription:
+		return m.Description()
+	case payment.FieldStatus:
+		return m.Status()
+	}
+	return nil, false
+}
+
+// OldField returns the old value of the field from the database. An error is
+// returned if the mutation operation is not UpdateOne, or the query to the
+// database failed.
+func (m *PaymentMutation) OldField(ctx context.Context, name string) (ent.Value, error) {
+	switch name {
+	case payment.FieldCardID:
+		return m.OldCardID(ctx)
+	case payment.FieldAmount:
+		return m.OldAmount(ctx)
+	case payment.FieldCurrency:
+		return m.OldCurrency(ctx)
+	case payment.FieldTime:
+		return m.OldTime(ctx)
+	case payment.FieldDescription:
+		return m.OldDescription(ctx)
+	case payment.FieldStatus:
+		return m.OldStatus(ctx)
+	}
+	return nil, fmt.Errorf("unknown Payment field %s", name)
+}
+
+// SetField sets the value of a field with the given name. It returns an error if
+// the field is not defined in the schema, or if the type mismatched the field
+// type.
+func (m *PaymentMutation) SetField(name string, value ent.Value) error {
+	switch name {
+	case payment.FieldCardID:
+		v, ok := value.(int)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetCardID(v)
+		return nil
+	case payment.FieldAmount:
+		v, ok := value.(float64)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetAmount(v)
+		return nil
+	case payment.FieldCurrency:
+		v, ok := value.(payment.Currency)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetCurrency(v)
+		return nil
+	case payment.FieldTime:
+		v, ok := value.(time.Time)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetTime(v)
+		return nil
+	case payment.FieldDescription:
+		v, ok := value.(string)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetDescription(v)
+		return nil
+	case payment.FieldStatus:
+		v, ok := value.(payment.Status)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetStatus(v)
+		return nil
+	}
+	return fmt.Errorf("unknown Payment field %s", name)
+}
+
+// AddedFields returns all numeric fields that were incremented/decremented during
+// this mutation.
+func (m *PaymentMutation) AddedFields() []string {
+	var fields []string
+	if m.addamount != nil {
+		fields = append(fields, payment.FieldAmount)
+	}
+	return fields
+}
+
+// AddedField returns the numeric value that was incremented/decremented on a field
+// with the given name. The second boolean return value indicates that this field
+// was not set, or was not defined in the schema.
+func (m *PaymentMutation) AddedField(name string) (ent.Value, bool) {
+	switch name {
+	case payment.FieldAmount:
+		return m.AddedAmount()
+	}
+	return nil, false
+}
+
+// AddField adds the value to the field with the given name. It returns an error if
+// the field is not defined in the schema, or if the type mismatched the field
+// type.
+func (m *PaymentMutation) AddField(name string, value ent.Value) error {
+	switch name {
+	case payment.FieldAmount:
+		v, ok := value.(float64)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.AddAmount(v)
+		return nil
+	}
+	return fmt.Errorf("unknown Payment numeric field %s", name)
+}
+
+// ClearedFields returns all nullable fields that were cleared during this
+// mutation.
+func (m *PaymentMutation) ClearedFields() []string {
+	return nil
+}
+
+// FieldCleared returns a boolean indicating if a field with the given name was
+// cleared in this mutation.
+func (m *PaymentMutation) FieldCleared(name string) bool {
+	_, ok := m.clearedFields[name]
+	return ok
+}
+
+// ClearField clears the value of the field with the given name. It returns an
+// error if the field is not defined in the schema.
+func (m *PaymentMutation) ClearField(name string) error {
+	return fmt.Errorf("unknown Payment nullable field %s", name)
+}
+
+// ResetField resets all changes in the mutation for the field with the given name.
+// It returns an error if the field is not defined in the schema.
+func (m *PaymentMutation) ResetField(name string) error {
+	switch name {
+	case payment.FieldCardID:
+		m.ResetCardID()
+		return nil
+	case payment.FieldAmount:
+		m.ResetAmount()
+		return nil
+	case payment.FieldCurrency:
+		m.ResetCurrency()
+		return nil
+	case payment.FieldTime:
+		m.ResetTime()
+		return nil
+	case payment.FieldDescription:
+		m.ResetDescription()
+		return nil
+	case payment.FieldStatus:
+		m.ResetStatus()
+		return nil
+	}
+	return fmt.Errorf("unknown Payment field %s", name)
+}
+
+// AddedEdges returns all edge names that were set/added in this mutation.
+func (m *PaymentMutation) AddedEdges() []string {
+	edges := make([]string, 0, 1)
+	if m.card != nil {
+		edges = append(edges, payment.EdgeCard)
+	}
+	return edges
+}
+
+// AddedIDs returns all IDs (to other nodes) that were added for the given edge
+// name in this mutation.
+func (m *PaymentMutation) AddedIDs(name string) []ent.Value {
+	switch name {
+	case payment.EdgeCard:
+		if id := m.card; id != nil {
+			return []ent.Value{*id}
+		}
+	}
+	return nil
+}
+
+// RemovedEdges returns all edge names that were removed in this mutation.
+func (m *PaymentMutation) RemovedEdges() []string {
+	edges := make([]string, 0, 1)
+	return edges
+}
+
+// RemovedIDs returns all IDs (to other nodes) that were removed for the edge with
+// the given name in this mutation.
+func (m *PaymentMutation) RemovedIDs(name string) []ent.Value {
+	return nil
+}
+
+// ClearedEdges returns all edge names that were cleared in this mutation.
+func (m *PaymentMutation) ClearedEdges() []string {
+	edges := make([]string, 0, 1)
+	if m.clearedcard {
+		edges = append(edges, payment.EdgeCard)
+	}
+	return edges
+}
+
+// EdgeCleared returns a boolean which indicates if the edge with the given name
+// was cleared in this mutation.
+func (m *PaymentMutation) EdgeCleared(name string) bool {
+	switch name {
+	case payment.EdgeCard:
+		return m.clearedcard
+	}
+	return false
+}
+
+// ClearEdge clears the value of the edge with the given name. It returns an error
+// if that edge is not defined in the schema.
+func (m *PaymentMutation) ClearEdge(name string) error {
+	switch name {
+	case payment.EdgeCard:
+		m.ClearCard()
+		return nil
+	}
+	return fmt.Errorf("unknown Payment unique edge %s", name)
+}
+
+// ResetEdge resets all changes to the edge with the given name in this mutation.
+// It returns an error if the edge is not defined in the schema.
+func (m *PaymentMutation) ResetEdge(name string) error {
+	switch name {
+	case payment.EdgeCard:
+		m.ResetCard()
+		return nil
+	}
+	return fmt.Errorf("unknown Payment edge %s", name)
+}
+
 // PetMutation represents an operation that mutates the Pet nodes in the graph.
 type PetMutation struct {
 	config

examples/migration/ent/payment.go

@@ -0,0 +1,198 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
+)
+
+// Payment is the model entity for the Payment schema.
+type Payment struct {
+	config `json:"-"`
+	// ID of the ent.
+	ID int `json:"id,omitempty"`
+	// CardID holds the value of the "card_id" field.
+	CardID int `json:"card_id,omitempty"`
+	// Amount holds the value of the "amount" field.
+	Amount float64 `json:"amount,omitempty"`
+	// Currency holds the value of the "currency" field.
+	Currency payment.Currency `json:"currency,omitempty"`
+	// Time holds the value of the "time" field.
+	Time time.Time `json:"time,omitempty"`
+	// Description holds the value of the "description" field.
+	Description string `json:"description,omitempty"`
+	// Status holds the value of the "status" field.
+	Status payment.Status `json:"status,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the PaymentQuery when eager-loading is set.
+	Edges        PaymentEdges `json:"edges"`
+	selectValues sql.SelectValues
+}
+
+// PaymentEdges holds the relations/edges for other nodes in the graph.
+type PaymentEdges struct {
+	// Card holds the value of the card edge.
+	Card *Card `json:"card,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [1]bool
+}
+
+// CardOrErr returns the Card value or an error if the edge
+// was not loaded in eager-loading, or loaded but was not found.
+func (e PaymentEdges) CardOrErr() (*Card, error) {
+	if e.loadedTypes[0] {
+		if e.Card == nil {
+			// Edge was loaded but was not found.
+			return nil, &NotFoundError{label: card.Label}
+		}
+		return e.Card, nil
+	}
+	return nil, &NotLoadedError{edge: "card"}
+}
+
+// scanValues returns the types for scanning values from sql.Rows.
+func (*Payment) scanValues(columns []string) ([]any, error) {
+	values := make([]any, len(columns))
+	for i := range columns {
+		switch columns[i] {
+		case payment.FieldAmount:
+			values[i] = new(sql.NullFloat64)
+		case payment.FieldID, payment.FieldCardID:
+			values[i] = new(sql.NullInt64)
+		case payment.FieldCurrency, payment.FieldDescription, payment.FieldStatus:
+			values[i] = new(sql.NullString)
+		case payment.FieldTime:
+			values[i] = new(sql.NullTime)
+		default:
+			values[i] = new(sql.UnknownType)
+		}
+	}
+	return values, nil
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the Payment fields.
+func (pa *Payment) assignValues(columns []string, values []any) error {
+	if m, n := len(values), len(columns); m < n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	for i := range columns {
+		switch columns[i] {
+		case payment.FieldID:
+			value, ok := values[i].(*sql.NullInt64)
+			if !ok {
+				return fmt.Errorf("unexpected type %T for field id", value)
+			}
+			pa.ID = int(value.Int64)
+		case payment.FieldCardID:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field card_id", values[i])
+			} else if value.Valid {
+				pa.CardID = int(value.Int64)
+			}
+		case payment.FieldAmount:
+			if value, ok := values[i].(*sql.NullFloat64); !ok {
+				return fmt.Errorf("unexpected type %T for field amount", values[i])
+			} else if value.Valid {
+				pa.Amount = value.Float64
+			}
+		case payment.FieldCurrency:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field currency", values[i])
+			} else if value.Valid {
+				pa.Currency = payment.Currency(value.String)
+			}
+		case payment.FieldTime:
+			if value, ok := values[i].(*sql.NullTime); !ok {
+				return fmt.Errorf("unexpected type %T for field time", values[i])
+			} else if value.Valid {
+				pa.Time = value.Time
+			}
+		case payment.FieldDescription:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field description", values[i])
+			} else if value.Valid {
+				pa.Description = value.String
+			}
+		case payment.FieldStatus:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field status", values[i])
+			} else if value.Valid {
+				pa.Status = payment.Status(value.String)
+			}
+		default:
+			pa.selectValues.Set(columns[i], values[i])
+		}
+	}
+	return nil
+}
+
+// Value returns the ent.Value that was dynamically selected and assigned to the Payment.
+// This includes values selected through modifiers, order, etc.
+func (pa *Payment) Value(name string) (ent.Value, error) {
+	return pa.selectValues.Get(name)
+}
+
+// QueryCard queries the "card" edge of the Payment entity.
+func (pa *Payment) QueryCard() *CardQuery {
+	return NewPaymentClient(pa.config).QueryCard(pa)
+}
+
+// Update returns a builder for updating this Payment.
+// Note that you need to call Payment.Unwrap() before calling this method if this Payment
+// was returned from a transaction, and the transaction was committed or rolled back.
+func (pa *Payment) Update() *PaymentUpdateOne {
+	return NewPaymentClient(pa.config).UpdateOne(pa)
+}
+
+// Unwrap unwraps the Payment entity that was returned from a transaction after it was closed,
+// so that all future queries will be executed through the driver which created the transaction.
+func (pa *Payment) Unwrap() *Payment {
+	_tx, ok := pa.config.driver.(*txDriver)
+	if !ok {
+		panic("ent: Payment is not a transactional entity")
+	}
+	pa.config.driver = _tx.drv
+	return pa
+}
+
+// String implements the fmt.Stringer.
+func (pa *Payment) String() string {
+	var builder strings.Builder
+	builder.WriteString("Payment(")
+	builder.WriteString(fmt.Sprintf("id=%v, ", pa.ID))
+	builder.WriteString("card_id=")
+	builder.WriteString(fmt.Sprintf("%v", pa.CardID))
+	builder.WriteString(", ")
+	builder.WriteString("amount=")
+	builder.WriteString(fmt.Sprintf("%v", pa.Amount))
+	builder.WriteString(", ")
+	builder.WriteString("currency=")
+	builder.WriteString(fmt.Sprintf("%v", pa.Currency))
+	builder.WriteString(", ")
+	builder.WriteString("time=")
+	builder.WriteString(pa.Time.Format(time.ANSIC))
+	builder.WriteString(", ")
+	builder.WriteString("description=")
+	builder.WriteString(pa.Description)
+	builder.WriteString(", ")
+	builder.WriteString("status=")
+	builder.WriteString(fmt.Sprintf("%v", pa.Status))
+	builder.WriteByte(')')
+	return builder.String()
+}
+
+// Payments is a parsable slice of Payment.
+type Payments []*Payment

examples/migration/ent/payment/payment.go

@@ -0,0 +1,169 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package payment
+
+import (
+	"fmt"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the payment type in the database.
+	Label = "payment"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldCardID holds the string denoting the card_id field in the database.
+	FieldCardID = "card_id"
+	// FieldAmount holds the string denoting the amount field in the database.
+	FieldAmount = "amount"
+	// FieldCurrency holds the string denoting the currency field in the database.
+	FieldCurrency = "currency"
+	// FieldTime holds the string denoting the time field in the database.
+	FieldTime = "time"
+	// FieldDescription holds the string denoting the description field in the database.
+	FieldDescription = "description"
+	// FieldStatus holds the string denoting the status field in the database.
+	FieldStatus = "status"
+	// EdgeCard holds the string denoting the card edge name in mutations.
+	EdgeCard = "card"
+	// Table holds the table name of the payment in the database.
+	Table = "payments"
+	// CardTable is the table that holds the card relation/edge.
+	CardTable = "payments"
+	// CardInverseTable is the table name for the Card entity.
+	// It exists in this package in order to avoid circular dependency with the "card" package.
+	CardInverseTable = "cards"
+	// CardColumn is the table column denoting the card relation/edge.
+	CardColumn = "card_id"
+)
+
+// Columns holds all SQL columns for payment fields.
+var Columns = []string{
+	FieldID,
+	FieldCardID,
+	FieldAmount,
+	FieldCurrency,
+	FieldTime,
+	FieldDescription,
+	FieldStatus,
+}
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	return false
+}
+
+var (
+	// AmountValidator is a validator for the "amount" field. It is called by the builders before save.
+	AmountValidator func(float64) error
+)
+
+// Currency defines the type for the "currency" enum field.
+type Currency string
+
+// Currency values.
+const (
+	CurrencyUSD Currency = "USD"
+	CurrencyILS Currency = "ILS"
+)
+
+func (c Currency) String() string {
+	return string(c)
+}
+
+// CurrencyValidator is a validator for the "currency" field enum values. It is called by the builders before save.
+func CurrencyValidator(c Currency) error {
+	switch c {
+	case CurrencyUSD, CurrencyILS:
+		return nil
+	default:
+		return fmt.Errorf("payment: invalid enum value for currency field: %q", c)
+	}
+}
+
+// Status defines the type for the "status" enum field.
+type Status string
+
+// Status values.
+const (
+	StatusPending   Status = "pending"
+	StatusCompleted Status = "completed"
+	StatusFailed    Status = "failed"
+)
+
+func (s Status) String() string {
+	return string(s)
+}
+
+// StatusValidator is a validator for the "status" field enum values. It is called by the builders before save.
+func StatusValidator(s Status) error {
+	switch s {
+	case StatusPending, StatusCompleted, StatusFailed:
+		return nil
+	default:
+		return fmt.Errorf("payment: invalid enum value for status field: %q", s)
+	}
+}
+
+// OrderOption defines the ordering options for the Payment queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}
+
+// ByCardID orders the results by the card_id field.
+func ByCardID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldCardID, opts...).ToFunc()
+}
+
+// ByAmount orders the results by the amount field.
+func ByAmount(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldAmount, opts...).ToFunc()
+}
+
+// ByCurrency orders the results by the currency field.
+func ByCurrency(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldCurrency, opts...).ToFunc()
+}
+
+// ByTime orders the results by the time field.
+func ByTime(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldTime, opts...).ToFunc()
+}
+
+// ByDescription orders the results by the description field.
+func ByDescription(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldDescription, opts...).ToFunc()
+}
+
+// ByStatus orders the results by the status field.
+func ByStatus(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldStatus, opts...).ToFunc()
+}
+
+// ByCardField orders the results by card field.
+func ByCardField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newCardStep(), sql.OrderByField(field, opts...))
+	}
+}
+func newCardStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(CardInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, CardTable, CardColumn),
+	)
+}

examples/migration/ent/payment/where.go

@@ -0,0 +1,323 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package payment
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/examples/migration/ent/predicate"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int) predicate.Payment {
+	return predicate.Payment(sql.FieldLTE(FieldID, id))
+}
+
+// CardID applies equality check predicate on the "card_id" field. It's identical to CardIDEQ.
+func CardID(v int) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldCardID, v))
+}
+
+// Amount applies equality check predicate on the "amount" field. It's identical to AmountEQ.
+func Amount(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldAmount, v))
+}
+
+// Time applies equality check predicate on the "time" field. It's identical to TimeEQ.
+func Time(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldTime, v))
+}
+
+// Description applies equality check predicate on the "description" field. It's identical to DescriptionEQ.
+func Description(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldDescription, v))
+}
+
+// CardIDEQ applies the EQ predicate on the "card_id" field.
+func CardIDEQ(v int) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldCardID, v))
+}
+
+// CardIDNEQ applies the NEQ predicate on the "card_id" field.
+func CardIDNEQ(v int) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldCardID, v))
+}
+
+// CardIDIn applies the In predicate on the "card_id" field.
+func CardIDIn(vs ...int) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldCardID, vs...))
+}
+
+// CardIDNotIn applies the NotIn predicate on the "card_id" field.
+func CardIDNotIn(vs ...int) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldCardID, vs...))
+}
+
+// AmountEQ applies the EQ predicate on the "amount" field.
+func AmountEQ(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldAmount, v))
+}
+
+// AmountNEQ applies the NEQ predicate on the "amount" field.
+func AmountNEQ(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldAmount, v))
+}
+
+// AmountIn applies the In predicate on the "amount" field.
+func AmountIn(vs ...float64) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldAmount, vs...))
+}
+
+// AmountNotIn applies the NotIn predicate on the "amount" field.
+func AmountNotIn(vs ...float64) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldAmount, vs...))
+}
+
+// AmountGT applies the GT predicate on the "amount" field.
+func AmountGT(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldGT(FieldAmount, v))
+}
+
+// AmountGTE applies the GTE predicate on the "amount" field.
+func AmountGTE(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldGTE(FieldAmount, v))
+}
+
+// AmountLT applies the LT predicate on the "amount" field.
+func AmountLT(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldLT(FieldAmount, v))
+}
+
+// AmountLTE applies the LTE predicate on the "amount" field.
+func AmountLTE(v float64) predicate.Payment {
+	return predicate.Payment(sql.FieldLTE(FieldAmount, v))
+}
+
+// CurrencyEQ applies the EQ predicate on the "currency" field.
+func CurrencyEQ(v Currency) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldCurrency, v))
+}
+
+// CurrencyNEQ applies the NEQ predicate on the "currency" field.
+func CurrencyNEQ(v Currency) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldCurrency, v))
+}
+
+// CurrencyIn applies the In predicate on the "currency" field.
+func CurrencyIn(vs ...Currency) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldCurrency, vs...))
+}
+
+// CurrencyNotIn applies the NotIn predicate on the "currency" field.
+func CurrencyNotIn(vs ...Currency) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldCurrency, vs...))
+}
+
+// TimeEQ applies the EQ predicate on the "time" field.
+func TimeEQ(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldTime, v))
+}
+
+// TimeNEQ applies the NEQ predicate on the "time" field.
+func TimeNEQ(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldTime, v))
+}
+
+// TimeIn applies the In predicate on the "time" field.
+func TimeIn(vs ...time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldTime, vs...))
+}
+
+// TimeNotIn applies the NotIn predicate on the "time" field.
+func TimeNotIn(vs ...time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldTime, vs...))
+}
+
+// TimeGT applies the GT predicate on the "time" field.
+func TimeGT(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldGT(FieldTime, v))
+}
+
+// TimeGTE applies the GTE predicate on the "time" field.
+func TimeGTE(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldGTE(FieldTime, v))
+}
+
+// TimeLT applies the LT predicate on the "time" field.
+func TimeLT(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldLT(FieldTime, v))
+}
+
+// TimeLTE applies the LTE predicate on the "time" field.
+func TimeLTE(v time.Time) predicate.Payment {
+	return predicate.Payment(sql.FieldLTE(FieldTime, v))
+}
+
+// DescriptionEQ applies the EQ predicate on the "description" field.
+func DescriptionEQ(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldDescription, v))
+}
+
+// DescriptionNEQ applies the NEQ predicate on the "description" field.
+func DescriptionNEQ(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldDescription, v))
+}
+
+// DescriptionIn applies the In predicate on the "description" field.
+func DescriptionIn(vs ...string) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldDescription, vs...))
+}
+
+// DescriptionNotIn applies the NotIn predicate on the "description" field.
+func DescriptionNotIn(vs ...string) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldDescription, vs...))
+}
+
+// DescriptionGT applies the GT predicate on the "description" field.
+func DescriptionGT(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldGT(FieldDescription, v))
+}
+
+// DescriptionGTE applies the GTE predicate on the "description" field.
+func DescriptionGTE(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldGTE(FieldDescription, v))
+}
+
+// DescriptionLT applies the LT predicate on the "description" field.
+func DescriptionLT(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldLT(FieldDescription, v))
+}
+
+// DescriptionLTE applies the LTE predicate on the "description" field.
+func DescriptionLTE(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldLTE(FieldDescription, v))
+}
+
+// DescriptionContains applies the Contains predicate on the "description" field.
+func DescriptionContains(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldContains(FieldDescription, v))
+}
+
+// DescriptionHasPrefix applies the HasPrefix predicate on the "description" field.
+func DescriptionHasPrefix(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldHasPrefix(FieldDescription, v))
+}
+
+// DescriptionHasSuffix applies the HasSuffix predicate on the "description" field.
+func DescriptionHasSuffix(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldHasSuffix(FieldDescription, v))
+}
+
+// DescriptionEqualFold applies the EqualFold predicate on the "description" field.
+func DescriptionEqualFold(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldEqualFold(FieldDescription, v))
+}
+
+// DescriptionContainsFold applies the ContainsFold predicate on the "description" field.
+func DescriptionContainsFold(v string) predicate.Payment {
+	return predicate.Payment(sql.FieldContainsFold(FieldDescription, v))
+}
+
+// StatusEQ applies the EQ predicate on the "status" field.
+func StatusEQ(v Status) predicate.Payment {
+	return predicate.Payment(sql.FieldEQ(FieldStatus, v))
+}
+
+// StatusNEQ applies the NEQ predicate on the "status" field.
+func StatusNEQ(v Status) predicate.Payment {
+	return predicate.Payment(sql.FieldNEQ(FieldStatus, v))
+}
+
+// StatusIn applies the In predicate on the "status" field.
+func StatusIn(vs ...Status) predicate.Payment {
+	return predicate.Payment(sql.FieldIn(FieldStatus, vs...))
+}
+
+// StatusNotIn applies the NotIn predicate on the "status" field.
+func StatusNotIn(vs ...Status) predicate.Payment {
+	return predicate.Payment(sql.FieldNotIn(FieldStatus, vs...))
+}
+
+// HasCard applies the HasEdge predicate on the "card" edge.
+func HasCard() predicate.Payment {
+	return predicate.Payment(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, CardTable, CardColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasCardWith applies the HasEdge predicate on the "card" edge with a given conditions (other predicates).
+func HasCardWith(preds ...predicate.Card) predicate.Payment {
+	return predicate.Payment(func(s *sql.Selector) {
+		step := newCardStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.Payment) predicate.Payment {
+	return predicate.Payment(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.Payment) predicate.Payment {
+	return predicate.Payment(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.Payment) predicate.Payment {
+	return predicate.Payment(sql.NotPredicates(p))
+}

examples/migration/ent/payment_create.go

@@ -0,0 +1,290 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
+	"entgo.io/ent/schema/field"
+)
+
+// PaymentCreate is the builder for creating a Payment entity.
+type PaymentCreate struct {
+	config
+	mutation *PaymentMutation
+	hooks    []Hook
+}
+
+// SetCardID sets the "card_id" field.
+func (pc *PaymentCreate) SetCardID(i int) *PaymentCreate {
+	pc.mutation.SetCardID(i)
+	return pc
+}
+
+// SetAmount sets the "amount" field.
+func (pc *PaymentCreate) SetAmount(f float64) *PaymentCreate {
+	pc.mutation.SetAmount(f)
+	return pc
+}
+
+// SetCurrency sets the "currency" field.
+func (pc *PaymentCreate) SetCurrency(pa payment.Currency) *PaymentCreate {
+	pc.mutation.SetCurrency(pa)
+	return pc
+}
+
+// SetTime sets the "time" field.
+func (pc *PaymentCreate) SetTime(t time.Time) *PaymentCreate {
+	pc.mutation.SetTime(t)
+	return pc
+}
+
+// SetDescription sets the "description" field.
+func (pc *PaymentCreate) SetDescription(s string) *PaymentCreate {
+	pc.mutation.SetDescription(s)
+	return pc
+}
+
+// SetStatus sets the "status" field.
+func (pc *PaymentCreate) SetStatus(pa payment.Status) *PaymentCreate {
+	pc.mutation.SetStatus(pa)
+	return pc
+}
+
+// SetCard sets the "card" edge to the Card entity.
+func (pc *PaymentCreate) SetCard(c *Card) *PaymentCreate {
+	return pc.SetCardID(c.ID)
+}
+
+// Mutation returns the PaymentMutation object of the builder.
+func (pc *PaymentCreate) Mutation() *PaymentMutation {
+	return pc.mutation
+}
+
+// Save creates the Payment in the database.
+func (pc *PaymentCreate) Save(ctx context.Context) (*Payment, error) {
+	return withHooks(ctx, pc.sqlSave, pc.mutation, pc.hooks)
+}
+
+// SaveX calls Save and panics if Save returns an error.
+func (pc *PaymentCreate) SaveX(ctx context.Context) *Payment {
+	v, err := pc.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (pc *PaymentCreate) Exec(ctx context.Context) error {
+	_, err := pc.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (pc *PaymentCreate) ExecX(ctx context.Context) {
+	if err := pc.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (pc *PaymentCreate) check() error {
+	if _, ok := pc.mutation.CardID(); !ok {
+		return &ValidationError{Name: "card_id", err: errors.New(`ent: missing required field "Payment.card_id"`)}
+	}
+	if _, ok := pc.mutation.Amount(); !ok {
+		return &ValidationError{Name: "amount", err: errors.New(`ent: missing required field "Payment.amount"`)}
+	}
+	if v, ok := pc.mutation.Amount(); ok {
+		if err := payment.AmountValidator(v); err != nil {
+			return &ValidationError{Name: "amount", err: fmt.Errorf(`ent: validator failed for field "Payment.amount": %w`, err)}
+		}
+	}
+	if _, ok := pc.mutation.Currency(); !ok {
+		return &ValidationError{Name: "currency", err: errors.New(`ent: missing required field "Payment.currency"`)}
+	}
+	if v, ok := pc.mutation.Currency(); ok {
+		if err := payment.CurrencyValidator(v); err != nil {
+			return &ValidationError{Name: "currency", err: fmt.Errorf(`ent: validator failed for field "Payment.currency": %w`, err)}
+		}
+	}
+	if _, ok := pc.mutation.Time(); !ok {
+		return &ValidationError{Name: "time", err: errors.New(`ent: missing required field "Payment.time"`)}
+	}
+	if _, ok := pc.mutation.Description(); !ok {
+		return &ValidationError{Name: "description", err: errors.New(`ent: missing required field "Payment.description"`)}
+	}
+	if _, ok := pc.mutation.Status(); !ok {
+		return &ValidationError{Name: "status", err: errors.New(`ent: missing required field "Payment.status"`)}
+	}
+	if v, ok := pc.mutation.Status(); ok {
+		if err := payment.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "Payment.status": %w`, err)}
+		}
+	}
+	if _, ok := pc.mutation.CardID(); !ok {
+		return &ValidationError{Name: "card", err: errors.New(`ent: missing required edge "Payment.card"`)}
+	}
+	return nil
+}
+
+func (pc *PaymentCreate) sqlSave(ctx context.Context) (*Payment, error) {
+	if err := pc.check(); err != nil {
+		return nil, err
+	}
+	_node, _spec := pc.createSpec()
+	if err := sqlgraph.CreateNode(ctx, pc.driver, _spec); err != nil {
+		if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	id := _spec.ID.Value.(int64)
+	_node.ID = int(id)
+	pc.mutation.id = &_node.ID
+	pc.mutation.done = true
+	return _node, nil
+}
+
+func (pc *PaymentCreate) createSpec() (*Payment, *sqlgraph.CreateSpec) {
+	var (
+		_node = &Payment{config: pc.config}
+		_spec = sqlgraph.NewCreateSpec(payment.Table, sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt))
+	)
+	if value, ok := pc.mutation.Amount(); ok {
+		_spec.SetField(payment.FieldAmount, field.TypeFloat64, value)
+		_node.Amount = value
+	}
+	if value, ok := pc.mutation.Currency(); ok {
+		_spec.SetField(payment.FieldCurrency, field.TypeEnum, value)
+		_node.Currency = value
+	}
+	if value, ok := pc.mutation.Time(); ok {
+		_spec.SetField(payment.FieldTime, field.TypeTime, value)
+		_node.Time = value
+	}
+	if value, ok := pc.mutation.Description(); ok {
+		_spec.SetField(payment.FieldDescription, field.TypeString, value)
+		_node.Description = value
+	}
+	if value, ok := pc.mutation.Status(); ok {
+		_spec.SetField(payment.FieldStatus, field.TypeEnum, value)
+		_node.Status = value
+	}
+	if nodes := pc.mutation.CardIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   payment.CardTable,
+			Columns: []string{payment.CardColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(card.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.CardID = nodes[0]
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	return _node, _spec
+}
+
+// PaymentCreateBulk is the builder for creating many Payment entities in bulk.
+type PaymentCreateBulk struct {
+	config
+	err      error
+	builders []*PaymentCreate
+}
+
+// Save creates the Payment entities in the database.
+func (pcb *PaymentCreateBulk) Save(ctx context.Context) ([]*Payment, error) {
+	if pcb.err != nil {
+		return nil, pcb.err
+	}
+	specs := make([]*sqlgraph.CreateSpec, len(pcb.builders))
+	nodes := make([]*Payment, len(pcb.builders))
+	mutators := make([]Mutator, len(pcb.builders))
+	for i := range pcb.builders {
+		func(i int, root context.Context) {
+			builder := pcb.builders[i]
+			var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
+				mutation, ok := m.(*PaymentMutation)
+				if !ok {
+					return nil, fmt.Errorf("unexpected mutation type %T", m)
+				}
+				if err := builder.check(); err != nil {
+					return nil, err
+				}
+				builder.mutation = mutation
+				var err error
+				nodes[i], specs[i] = builder.createSpec()
+				if i < len(mutators)-1 {
+					_, err = mutators[i+1].Mutate(root, pcb.builders[i+1].mutation)
+				} else {
+					spec := &sqlgraph.BatchCreateSpec{Nodes: specs}
+					// Invoke the actual operation on the latest mutation in the chain.
+					if err = sqlgraph.BatchCreate(ctx, pcb.driver, spec); err != nil {
+						if sqlgraph.IsConstraintError(err) {
+							err = &ConstraintError{msg: err.Error(), wrap: err}
+						}
+					}
+				}
+				if err != nil {
+					return nil, err
+				}
+				mutation.id = &nodes[i].ID
+				if specs[i].ID.Value != nil {
+					id := specs[i].ID.Value.(int64)
+					nodes[i].ID = int(id)
+				}
+				mutation.done = true
+				return nodes[i], nil
+			})
+			for i := len(builder.hooks) - 1; i >= 0; i-- {
+				mut = builder.hooks[i](mut)
+			}
+			mutators[i] = mut
+		}(i, ctx)
+	}
+	if len(mutators) > 0 {
+		if _, err := mutators[0].Mutate(ctx, pcb.builders[0].mutation); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (pcb *PaymentCreateBulk) SaveX(ctx context.Context) []*Payment {
+	v, err := pcb.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (pcb *PaymentCreateBulk) Exec(ctx context.Context) error {
+	_, err := pcb.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (pcb *PaymentCreateBulk) ExecX(ctx context.Context) {
+	if err := pcb.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

examples/migration/ent/payment_delete.go

@@ -0,0 +1,92 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/examples/migration/ent/payment"
+	"entgo.io/ent/examples/migration/ent/predicate"
+	"entgo.io/ent/schema/field"
+)
+
+// PaymentDelete is the builder for deleting a Payment entity.
+type PaymentDelete struct {
+	config
+	hooks    []Hook
+	mutation *PaymentMutation
+}
+
+// Where appends a list predicates to the PaymentDelete builder.
+func (pd *PaymentDelete) Where(ps ...predicate.Payment) *PaymentDelete {
+	pd.mutation.Where(ps...)
+	return pd
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (pd *PaymentDelete) Exec(ctx context.Context) (int, error) {
+	return withHooks(ctx, pd.sqlExec, pd.mutation, pd.hooks)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (pd *PaymentDelete) ExecX(ctx context.Context) int {
+	n, err := pd.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (pd *PaymentDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(payment.Table, sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt))
+	if ps := pd.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	affected, err := sqlgraph.DeleteNodes(ctx, pd.driver, _spec)
+	if err != nil && sqlgraph.IsConstraintError(err) {
+		err = &ConstraintError{msg: err.Error(), wrap: err}
+	}
+	pd.mutation.done = true
+	return affected, err
+}
+
+// PaymentDeleteOne is the builder for deleting a single Payment entity.
+type PaymentDeleteOne struct {
+	pd *PaymentDelete
+}
+
+// Where appends a list predicates to the PaymentDelete builder.
+func (pdo *PaymentDeleteOne) Where(ps ...predicate.Payment) *PaymentDeleteOne {
+	pdo.pd.mutation.Where(ps...)
+	return pdo
+}
+
+// Exec executes the deletion query.
+func (pdo *PaymentDeleteOne) Exec(ctx context.Context) error {
+	n, err := pdo.pd.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{payment.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (pdo *PaymentDeleteOne) ExecX(ctx context.Context) {
+	if err := pdo.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

examples/migration/ent/payment_query.go

@@ -0,0 +1,609 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
+	"entgo.io/ent/examples/migration/ent/predicate"
+	"entgo.io/ent/schema/field"
+)
+
+// PaymentQuery is the builder for querying Payment entities.
+type PaymentQuery struct {
+	config
+	ctx        *QueryContext
+	order      []payment.OrderOption
+	inters     []Interceptor
+	predicates []predicate.Payment
+	withCard   *CardQuery
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the PaymentQuery builder.
+func (pq *PaymentQuery) Where(ps ...predicate.Payment) *PaymentQuery {
+	pq.predicates = append(pq.predicates, ps...)
+	return pq
+}
+
+// Limit the number of records to be returned by this query.
+func (pq *PaymentQuery) Limit(limit int) *PaymentQuery {
+	pq.ctx.Limit = &limit
+	return pq
+}
+
+// Offset to start from.
+func (pq *PaymentQuery) Offset(offset int) *PaymentQuery {
+	pq.ctx.Offset = &offset
+	return pq
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (pq *PaymentQuery) Unique(unique bool) *PaymentQuery {
+	pq.ctx.Unique = &unique
+	return pq
+}
+
+// Order specifies how the records should be ordered.
+func (pq *PaymentQuery) Order(o ...payment.OrderOption) *PaymentQuery {
+	pq.order = append(pq.order, o...)
+	return pq
+}
+
+// QueryCard chains the current query on the "card" edge.
+func (pq *PaymentQuery) QueryCard() *CardQuery {
+	query := (&CardClient{config: pq.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := pq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := pq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(payment.Table, payment.FieldID, selector),
+			sqlgraph.To(card.Table, card.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, payment.CardTable, payment.CardColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(pq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first Payment entity from the query.
+// Returns a *NotFoundError when no Payment was found.
+func (pq *PaymentQuery) First(ctx context.Context) (*Payment, error) {
+	nodes, err := pq.Limit(1).All(setContextOp(ctx, pq.ctx, "First"))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{payment.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (pq *PaymentQuery) FirstX(ctx context.Context) *Payment {
+	node, err := pq.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first Payment ID from the query.
+// Returns a *NotFoundError when no Payment ID was found.
+func (pq *PaymentQuery) FirstID(ctx context.Context) (id int, err error) {
+	var ids []int
+	if ids, err = pq.Limit(1).IDs(setContextOp(ctx, pq.ctx, "FirstID")); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{payment.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (pq *PaymentQuery) FirstIDX(ctx context.Context) int {
+	id, err := pq.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single Payment entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one Payment entity is found.
+// Returns a *NotFoundError when no Payment entities are found.
+func (pq *PaymentQuery) Only(ctx context.Context) (*Payment, error) {
+	nodes, err := pq.Limit(2).All(setContextOp(ctx, pq.ctx, "Only"))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{payment.Label}
+	default:
+		return nil, &NotSingularError{payment.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (pq *PaymentQuery) OnlyX(ctx context.Context) *Payment {
+	node, err := pq.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only Payment ID in the query.
+// Returns a *NotSingularError when more than one Payment ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (pq *PaymentQuery) OnlyID(ctx context.Context) (id int, err error) {
+	var ids []int
+	if ids, err = pq.Limit(2).IDs(setContextOp(ctx, pq.ctx, "OnlyID")); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{payment.Label}
+	default:
+		err = &NotSingularError{payment.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (pq *PaymentQuery) OnlyIDX(ctx context.Context) int {
+	id, err := pq.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of Payments.
+func (pq *PaymentQuery) All(ctx context.Context) ([]*Payment, error) {
+	ctx = setContextOp(ctx, pq.ctx, "All")
+	if err := pq.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*Payment, *PaymentQuery]()
+	return withInterceptors[[]*Payment](ctx, pq, qr, pq.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (pq *PaymentQuery) AllX(ctx context.Context) []*Payment {
+	nodes, err := pq.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of Payment IDs.
+func (pq *PaymentQuery) IDs(ctx context.Context) (ids []int, err error) {
+	if pq.ctx.Unique == nil && pq.path != nil {
+		pq.Unique(true)
+	}
+	ctx = setContextOp(ctx, pq.ctx, "IDs")
+	if err = pq.Select(payment.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (pq *PaymentQuery) IDsX(ctx context.Context) []int {
+	ids, err := pq.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (pq *PaymentQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, pq.ctx, "Count")
+	if err := pq.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, pq, querierCount[*PaymentQuery](), pq.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (pq *PaymentQuery) CountX(ctx context.Context) int {
+	count, err := pq.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (pq *PaymentQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, pq.ctx, "Exist")
+	switch _, err := pq.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (pq *PaymentQuery) ExistX(ctx context.Context) bool {
+	exist, err := pq.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the PaymentQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (pq *PaymentQuery) Clone() *PaymentQuery {
+	if pq == nil {
+		return nil
+	}
+	return &PaymentQuery{
+		config:     pq.config,
+		ctx:        pq.ctx.Clone(),
+		order:      append([]payment.OrderOption{}, pq.order...),
+		inters:     append([]Interceptor{}, pq.inters...),
+		predicates: append([]predicate.Payment{}, pq.predicates...),
+		withCard:   pq.withCard.Clone(),
+		// clone intermediate query.
+		sql:  pq.sql.Clone(),
+		path: pq.path,
+	}
+}
+
+// WithCard tells the query-builder to eager-load the nodes that are connected to
+// the "card" edge. The optional arguments are used to configure the query builder of the edge.
+func (pq *PaymentQuery) WithCard(opts ...func(*CardQuery)) *PaymentQuery {
+	query := (&CardClient{config: pq.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	pq.withCard = query
+	return pq
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		CardID int `json:"card_id,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.Payment.Query().
+//		GroupBy(payment.FieldCardID).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (pq *PaymentQuery) GroupBy(field string, fields ...string) *PaymentGroupBy {
+	pq.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &PaymentGroupBy{build: pq}
+	grbuild.flds = &pq.ctx.Fields
+	grbuild.label = payment.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		CardID int `json:"card_id,omitempty"`
+//	}
+//
+//	client.Payment.Query().
+//		Select(payment.FieldCardID).
+//		Scan(ctx, &v)
+func (pq *PaymentQuery) Select(fields ...string) *PaymentSelect {
+	pq.ctx.Fields = append(pq.ctx.Fields, fields...)
+	sbuild := &PaymentSelect{PaymentQuery: pq}
+	sbuild.label = payment.Label
+	sbuild.flds, sbuild.scan = &pq.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a PaymentSelect configured with the given aggregations.
+func (pq *PaymentQuery) Aggregate(fns ...AggregateFunc) *PaymentSelect {
+	return pq.Select().Aggregate(fns...)
+}
+
+func (pq *PaymentQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range pq.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, pq); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range pq.ctx.Fields {
+		if !payment.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if pq.path != nil {
+		prev, err := pq.path(ctx)
+		if err != nil {
+			return err
+		}
+		pq.sql = prev
+	}
+	return nil
+}
+
+func (pq *PaymentQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Payment, error) {
+	var (
+		nodes       = []*Payment{}
+		_spec       = pq.querySpec()
+		loadedTypes = [1]bool{
+			pq.withCard != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*Payment).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &Payment{config: pq.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, pq.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := pq.withCard; query != nil {
+		if err := pq.loadCard(ctx, query, nodes, nil,
+			func(n *Payment, e *Card) { n.Edges.Card = e }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (pq *PaymentQuery) loadCard(ctx context.Context, query *CardQuery, nodes []*Payment, init func(*Payment), assign func(*Payment, *Card)) error {
+	ids := make([]int, 0, len(nodes))
+	nodeids := make(map[int][]*Payment)
+	for i := range nodes {
+		fk := nodes[i].CardID
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(card.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "card_id" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+
+func (pq *PaymentQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := pq.querySpec()
+	_spec.Node.Columns = pq.ctx.Fields
+	if len(pq.ctx.Fields) > 0 {
+		_spec.Unique = pq.ctx.Unique != nil && *pq.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, pq.driver, _spec)
+}
+
+func (pq *PaymentQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(payment.Table, payment.Columns, sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt))
+	_spec.From = pq.sql
+	if unique := pq.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if pq.path != nil {
+		_spec.Unique = true
+	}
+	if fields := pq.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, payment.FieldID)
+		for i := range fields {
+			if fields[i] != payment.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+		if pq.withCard != nil {
+			_spec.Node.AddColumnOnce(payment.FieldCardID)
+		}
+	}
+	if ps := pq.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := pq.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := pq.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := pq.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (pq *PaymentQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(pq.driver.Dialect())
+	t1 := builder.Table(payment.Table)
+	columns := pq.ctx.Fields
+	if len(columns) == 0 {
+		columns = payment.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if pq.sql != nil {
+		selector = pq.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if pq.ctx.Unique != nil && *pq.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, p := range pq.predicates {
+		p(selector)
+	}
+	for _, p := range pq.order {
+		p(selector)
+	}
+	if offset := pq.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := pq.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// PaymentGroupBy is the group-by builder for Payment entities.
+type PaymentGroupBy struct {
+	selector
+	build *PaymentQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (pgb *PaymentGroupBy) Aggregate(fns ...AggregateFunc) *PaymentGroupBy {
+	pgb.fns = append(pgb.fns, fns...)
+	return pgb
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (pgb *PaymentGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, pgb.build.ctx, "GroupBy")
+	if err := pgb.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PaymentQuery, *PaymentGroupBy](ctx, pgb.build, pgb, pgb.build.inters, v)
+}
+
+func (pgb *PaymentGroupBy) sqlScan(ctx context.Context, root *PaymentQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(pgb.fns))
+	for _, fn := range pgb.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*pgb.flds)+len(pgb.fns))
+		for _, f := range *pgb.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*pgb.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := pgb.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// PaymentSelect is the builder for selecting fields of Payment entities.
+type PaymentSelect struct {
+	*PaymentQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (ps *PaymentSelect) Aggregate(fns ...AggregateFunc) *PaymentSelect {
+	ps.fns = append(ps.fns, fns...)
+	return ps
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (ps *PaymentSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, ps.ctx, "Select")
+	if err := ps.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PaymentQuery, *PaymentSelect](ctx, ps.PaymentQuery, ps, ps.inters, v)
+}
+
+func (ps *PaymentSelect) sqlScan(ctx context.Context, root *PaymentQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(ps.fns))
+	for _, fn := range ps.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*ps.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := ps.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

examples/migration/ent/payment_update.go

@@ -0,0 +1,531 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
+	"entgo.io/ent/examples/migration/ent/predicate"
+	"entgo.io/ent/schema/field"
+)
+
+// PaymentUpdate is the builder for updating Payment entities.
+type PaymentUpdate struct {
+	config
+	hooks    []Hook
+	mutation *PaymentMutation
+}
+
+// Where appends a list predicates to the PaymentUpdate builder.
+func (pu *PaymentUpdate) Where(ps ...predicate.Payment) *PaymentUpdate {
+	pu.mutation.Where(ps...)
+	return pu
+}
+
+// SetCardID sets the "card_id" field.
+func (pu *PaymentUpdate) SetCardID(i int) *PaymentUpdate {
+	pu.mutation.SetCardID(i)
+	return pu
+}
+
+// SetNillableCardID sets the "card_id" field if the given value is not nil.
+func (pu *PaymentUpdate) SetNillableCardID(i *int) *PaymentUpdate {
+	if i != nil {
+		pu.SetCardID(*i)
+	}
+	return pu
+}
+
+// SetAmount sets the "amount" field.
+func (pu *PaymentUpdate) SetAmount(f float64) *PaymentUpdate {
+	pu.mutation.ResetAmount()
+	pu.mutation.SetAmount(f)
+	return pu
+}
+
+// SetNillableAmount sets the "amount" field if the given value is not nil.
+func (pu *PaymentUpdate) SetNillableAmount(f *float64) *PaymentUpdate {
+	if f != nil {
+		pu.SetAmount(*f)
+	}
+	return pu
+}
+
+// AddAmount adds f to the "amount" field.
+func (pu *PaymentUpdate) AddAmount(f float64) *PaymentUpdate {
+	pu.mutation.AddAmount(f)
+	return pu
+}
+
+// SetCurrency sets the "currency" field.
+func (pu *PaymentUpdate) SetCurrency(pa payment.Currency) *PaymentUpdate {
+	pu.mutation.SetCurrency(pa)
+	return pu
+}
+
+// SetNillableCurrency sets the "currency" field if the given value is not nil.
+func (pu *PaymentUpdate) SetNillableCurrency(pa *payment.Currency) *PaymentUpdate {
+	if pa != nil {
+		pu.SetCurrency(*pa)
+	}
+	return pu
+}
+
+// SetTime sets the "time" field.
+func (pu *PaymentUpdate) SetTime(t time.Time) *PaymentUpdate {
+	pu.mutation.SetTime(t)
+	return pu
+}
+
+// SetNillableTime sets the "time" field if the given value is not nil.
+func (pu *PaymentUpdate) SetNillableTime(t *time.Time) *PaymentUpdate {
+	if t != nil {
+		pu.SetTime(*t)
+	}
+	return pu
+}
+
+// SetDescription sets the "description" field.
+func (pu *PaymentUpdate) SetDescription(s string) *PaymentUpdate {
+	pu.mutation.SetDescription(s)
+	return pu
+}
+
+// SetNillableDescription sets the "description" field if the given value is not nil.
+func (pu *PaymentUpdate) SetNillableDescription(s *string) *PaymentUpdate {
+	if s != nil {
+		pu.SetDescription(*s)
+	}
+	return pu
+}
+
+// SetStatus sets the "status" field.
+func (pu *PaymentUpdate) SetStatus(pa payment.Status) *PaymentUpdate {
+	pu.mutation.SetStatus(pa)
+	return pu
+}
+
+// SetNillableStatus sets the "status" field if the given value is not nil.
+func (pu *PaymentUpdate) SetNillableStatus(pa *payment.Status) *PaymentUpdate {
+	if pa != nil {
+		pu.SetStatus(*pa)
+	}
+	return pu
+}
+
+// SetCard sets the "card" edge to the Card entity.
+func (pu *PaymentUpdate) SetCard(c *Card) *PaymentUpdate {
+	return pu.SetCardID(c.ID)
+}
+
+// Mutation returns the PaymentMutation object of the builder.
+func (pu *PaymentUpdate) Mutation() *PaymentMutation {
+	return pu.mutation
+}
+
+// ClearCard clears the "card" edge to the Card entity.
+func (pu *PaymentUpdate) ClearCard() *PaymentUpdate {
+	pu.mutation.ClearCard()
+	return pu
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (pu *PaymentUpdate) Save(ctx context.Context) (int, error) {
+	return withHooks(ctx, pu.sqlSave, pu.mutation, pu.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (pu *PaymentUpdate) SaveX(ctx context.Context) int {
+	affected, err := pu.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (pu *PaymentUpdate) Exec(ctx context.Context) error {
+	_, err := pu.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (pu *PaymentUpdate) ExecX(ctx context.Context) {
+	if err := pu.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (pu *PaymentUpdate) check() error {
+	if v, ok := pu.mutation.Amount(); ok {
+		if err := payment.AmountValidator(v); err != nil {
+			return &ValidationError{Name: "amount", err: fmt.Errorf(`ent: validator failed for field "Payment.amount": %w`, err)}
+		}
+	}
+	if v, ok := pu.mutation.Currency(); ok {
+		if err := payment.CurrencyValidator(v); err != nil {
+			return &ValidationError{Name: "currency", err: fmt.Errorf(`ent: validator failed for field "Payment.currency": %w`, err)}
+		}
+	}
+	if v, ok := pu.mutation.Status(); ok {
+		if err := payment.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "Payment.status": %w`, err)}
+		}
+	}
+	if _, ok := pu.mutation.CardID(); pu.mutation.CardCleared() && !ok {
+		return errors.New(`ent: clearing a required unique edge "Payment.card"`)
+	}
+	return nil
+}
+
+func (pu *PaymentUpdate) sqlSave(ctx context.Context) (n int, err error) {
+	if err := pu.check(); err != nil {
+		return n, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(payment.Table, payment.Columns, sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt))
+	if ps := pu.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := pu.mutation.Amount(); ok {
+		_spec.SetField(payment.FieldAmount, field.TypeFloat64, value)
+	}
+	if value, ok := pu.mutation.AddedAmount(); ok {
+		_spec.AddField(payment.FieldAmount, field.TypeFloat64, value)
+	}
+	if value, ok := pu.mutation.Currency(); ok {
+		_spec.SetField(payment.FieldCurrency, field.TypeEnum, value)
+	}
+	if value, ok := pu.mutation.Time(); ok {
+		_spec.SetField(payment.FieldTime, field.TypeTime, value)
+	}
+	if value, ok := pu.mutation.Description(); ok {
+		_spec.SetField(payment.FieldDescription, field.TypeString, value)
+	}
+	if value, ok := pu.mutation.Status(); ok {
+		_spec.SetField(payment.FieldStatus, field.TypeEnum, value)
+	}
+	if pu.mutation.CardCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   payment.CardTable,
+			Columns: []string{payment.CardColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(card.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := pu.mutation.CardIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   payment.CardTable,
+			Columns: []string{payment.CardColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(card.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if n, err = sqlgraph.UpdateNodes(ctx, pu.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{payment.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	pu.mutation.done = true
+	return n, nil
+}
+
+// PaymentUpdateOne is the builder for updating a single Payment entity.
+type PaymentUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *PaymentMutation
+}
+
+// SetCardID sets the "card_id" field.
+func (puo *PaymentUpdateOne) SetCardID(i int) *PaymentUpdateOne {
+	puo.mutation.SetCardID(i)
+	return puo
+}
+
+// SetNillableCardID sets the "card_id" field if the given value is not nil.
+func (puo *PaymentUpdateOne) SetNillableCardID(i *int) *PaymentUpdateOne {
+	if i != nil {
+		puo.SetCardID(*i)
+	}
+	return puo
+}
+
+// SetAmount sets the "amount" field.
+func (puo *PaymentUpdateOne) SetAmount(f float64) *PaymentUpdateOne {
+	puo.mutation.ResetAmount()
+	puo.mutation.SetAmount(f)
+	return puo
+}
+
+// SetNillableAmount sets the "amount" field if the given value is not nil.
+func (puo *PaymentUpdateOne) SetNillableAmount(f *float64) *PaymentUpdateOne {
+	if f != nil {
+		puo.SetAmount(*f)
+	}
+	return puo
+}
+
+// AddAmount adds f to the "amount" field.
+func (puo *PaymentUpdateOne) AddAmount(f float64) *PaymentUpdateOne {
+	puo.mutation.AddAmount(f)
+	return puo
+}
+
+// SetCurrency sets the "currency" field.
+func (puo *PaymentUpdateOne) SetCurrency(pa payment.Currency) *PaymentUpdateOne {
+	puo.mutation.SetCurrency(pa)
+	return puo
+}
+
+// SetNillableCurrency sets the "currency" field if the given value is not nil.
+func (puo *PaymentUpdateOne) SetNillableCurrency(pa *payment.Currency) *PaymentUpdateOne {
+	if pa != nil {
+		puo.SetCurrency(*pa)
+	}
+	return puo
+}
+
+// SetTime sets the "time" field.
+func (puo *PaymentUpdateOne) SetTime(t time.Time) *PaymentUpdateOne {
+	puo.mutation.SetTime(t)
+	return puo
+}
+
+// SetNillableTime sets the "time" field if the given value is not nil.
+func (puo *PaymentUpdateOne) SetNillableTime(t *time.Time) *PaymentUpdateOne {
+	if t != nil {
+		puo.SetTime(*t)
+	}
+	return puo
+}
+
+// SetDescription sets the "description" field.
+func (puo *PaymentUpdateOne) SetDescription(s string) *PaymentUpdateOne {
+	puo.mutation.SetDescription(s)
+	return puo
+}
+
+// SetNillableDescription sets the "description" field if the given value is not nil.
+func (puo *PaymentUpdateOne) SetNillableDescription(s *string) *PaymentUpdateOne {
+	if s != nil {
+		puo.SetDescription(*s)
+	}
+	return puo
+}
+
+// SetStatus sets the "status" field.
+func (puo *PaymentUpdateOne) SetStatus(pa payment.Status) *PaymentUpdateOne {
+	puo.mutation.SetStatus(pa)
+	return puo
+}
+
+// SetNillableStatus sets the "status" field if the given value is not nil.
+func (puo *PaymentUpdateOne) SetNillableStatus(pa *payment.Status) *PaymentUpdateOne {
+	if pa != nil {
+		puo.SetStatus(*pa)
+	}
+	return puo
+}
+
+// SetCard sets the "card" edge to the Card entity.
+func (puo *PaymentUpdateOne) SetCard(c *Card) *PaymentUpdateOne {
+	return puo.SetCardID(c.ID)
+}
+
+// Mutation returns the PaymentMutation object of the builder.
+func (puo *PaymentUpdateOne) Mutation() *PaymentMutation {
+	return puo.mutation
+}
+
+// ClearCard clears the "card" edge to the Card entity.
+func (puo *PaymentUpdateOne) ClearCard() *PaymentUpdateOne {
+	puo.mutation.ClearCard()
+	return puo
+}
+
+// Where appends a list predicates to the PaymentUpdate builder.
+func (puo *PaymentUpdateOne) Where(ps ...predicate.Payment) *PaymentUpdateOne {
+	puo.mutation.Where(ps...)
+	return puo
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (puo *PaymentUpdateOne) Select(field string, fields ...string) *PaymentUpdateOne {
+	puo.fields = append([]string{field}, fields...)
+	return puo
+}
+
+// Save executes the query and returns the updated Payment entity.
+func (puo *PaymentUpdateOne) Save(ctx context.Context) (*Payment, error) {
+	return withHooks(ctx, puo.sqlSave, puo.mutation, puo.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (puo *PaymentUpdateOne) SaveX(ctx context.Context) *Payment {
+	node, err := puo.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (puo *PaymentUpdateOne) Exec(ctx context.Context) error {
+	_, err := puo.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (puo *PaymentUpdateOne) ExecX(ctx context.Context) {
+	if err := puo.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (puo *PaymentUpdateOne) check() error {
+	if v, ok := puo.mutation.Amount(); ok {
+		if err := payment.AmountValidator(v); err != nil {
+			return &ValidationError{Name: "amount", err: fmt.Errorf(`ent: validator failed for field "Payment.amount": %w`, err)}
+		}
+	}
+	if v, ok := puo.mutation.Currency(); ok {
+		if err := payment.CurrencyValidator(v); err != nil {
+			return &ValidationError{Name: "currency", err: fmt.Errorf(`ent: validator failed for field "Payment.currency": %w`, err)}
+		}
+	}
+	if v, ok := puo.mutation.Status(); ok {
+		if err := payment.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "Payment.status": %w`, err)}
+		}
+	}
+	if _, ok := puo.mutation.CardID(); puo.mutation.CardCleared() && !ok {
+		return errors.New(`ent: clearing a required unique edge "Payment.card"`)
+	}
+	return nil
+}
+
+func (puo *PaymentUpdateOne) sqlSave(ctx context.Context) (_node *Payment, err error) {
+	if err := puo.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(payment.Table, payment.Columns, sqlgraph.NewFieldSpec(payment.FieldID, field.TypeInt))
+	id, ok := puo.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "Payment.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := puo.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, payment.FieldID)
+		for _, f := range fields {
+			if !payment.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != payment.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := puo.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := puo.mutation.Amount(); ok {
+		_spec.SetField(payment.FieldAmount, field.TypeFloat64, value)
+	}
+	if value, ok := puo.mutation.AddedAmount(); ok {
+		_spec.AddField(payment.FieldAmount, field.TypeFloat64, value)
+	}
+	if value, ok := puo.mutation.Currency(); ok {
+		_spec.SetField(payment.FieldCurrency, field.TypeEnum, value)
+	}
+	if value, ok := puo.mutation.Time(); ok {
+		_spec.SetField(payment.FieldTime, field.TypeTime, value)
+	}
+	if value, ok := puo.mutation.Description(); ok {
+		_spec.SetField(payment.FieldDescription, field.TypeString, value)
+	}
+	if value, ok := puo.mutation.Status(); ok {
+		_spec.SetField(payment.FieldStatus, field.TypeEnum, value)
+	}
+	if puo.mutation.CardCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   payment.CardTable,
+			Columns: []string{payment.CardColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(card.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := puo.mutation.CardIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   payment.CardTable,
+			Columns: []string{payment.CardColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(card.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &Payment{config: puo.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, puo.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{payment.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	puo.mutation.done = true
+	return _node, nil
+}

examples/migration/ent/predicate/predicate.go

@@ -13,6 +13,9 @@ import (
 // Card is the predicate function for card builders.
 type Card func(*sql.Selector)
 
+// Payment is the predicate function for payment builders.
+type Payment func(*sql.Selector)
+
 // Pet is the predicate function for pet builders.
 type Pet func(*sql.Selector)
 

examples/migration/ent/runtime.go

@@ -8,6 +8,7 @@ package ent
 
 import (
 	"entgo.io/ent/examples/migration/ent/card"
+	"entgo.io/ent/examples/migration/ent/payment"
 	"entgo.io/ent/examples/migration/ent/pet"
 	"entgo.io/ent/examples/migration/ent/schema"
 	"github.com/google/uuid"
@@ -23,6 +24,12 @@ func init() {
 	cardDescOwnerID := cardFields[1].Descriptor()
 	// card.DefaultOwnerID holds the default value on creation for the owner_id field.
 	card.DefaultOwnerID = cardDescOwnerID.Default.(int)
+	paymentFields := schema.Payment{}.Fields()
+	_ = paymentFields
+	// paymentDescAmount is the schema descriptor for amount field.
+	paymentDescAmount := paymentFields[1].Descriptor()
+	// payment.AmountValidator is a validator for the "amount" field. It is called by the builders before save.
+	payment.AmountValidator = paymentDescAmount.Validators[0].(func(float64) error)
 	petFields := schema.Pet{}.Fields()
 	_ = petFields
 	// petDescOwnerID is the schema descriptor for owner_id field.

examples/migration/ent/schema/card.go

@@ -34,6 +34,7 @@ func (Card) Edges() []ent.Edge {
 			Unique().
 			Required().
 			Field("owner_id"),
+		edge.To("payments", Payment.Type),
 	}
 }
 

examples/migration/ent/schema/payment.go

@@ -0,0 +1,63 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// Payment holds the schema definition for the Payment entity.
+type Payment struct {
+	ent.Schema
+}
+
+// Fields of the Payment.
+func (Payment) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int("card_id"),
+		field.Float("amount").
+			Positive(),
+		field.Enum("currency").
+			Values("USD", "ILS"),
+		field.Time("time"),
+		field.String("description"),
+		field.Enum("status").
+			Values("pending", "completed", "failed"),
+	}
+}
+
+// Edges of the Payment.
+func (Payment) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("card", Card.Type).
+			Ref("payments").
+			Unique().
+			Required().
+			Field("card_id"),
+	}
+}
+
+// Indexes of the Payment.
+func (Payment) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("status", "time"),
+	}
+}
+
+// Annotations of the Payment.
+func (Payment) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		// Named check constraints are compared by their name.
+		// Thus, the definition does not need to be normalized.
+		entsql.Checks(map[string]string{
+			"amount_positive": "(`amount` > 0)",
+		}),
+	}
+}

examples/migration/ent/tx.go

@@ -18,6 +18,8 @@ type Tx struct {
 	config
 	// Card is the client for interacting with the Card builders.
 	Card *CardClient
+	// Payment is the client for interacting with the Payment builders.
+	Payment *PaymentClient
 	// Pet is the client for interacting with the Pet builders.
 	Pet *PetClient
 	// User is the client for interacting with the User builders.
@@ -154,6 +156,7 @@ func (tx *Tx) Client() *Client {
 
 func (tx *Tx) init() {
 	tx.Card = NewCardClient(tx.config)
+	tx.Payment = NewPaymentClient(tx.config)
 	tx.Pet = NewPetClient(tx.config)
 	tx.User = NewUserClient(tx.config)
 }