examples: regenerate assets

Closes #261

examples/start/ent/car.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/facebookincubator/ent/dialect/sql"
+	"github.com/facebookincubator/ent/examples/start/ent/car"
 )
 
 // Car is the model entity for the Car schema.
@@ -25,24 +26,37 @@ type Car struct {
 	RegisteredAt time.Time `json:"registered_at,omitempty"`
 }
 
-// FromRows scans the sql response data into Car.
-func (c *Car) FromRows(rows *sql.Rows) error {
-	var scanc struct {
-		ID           int
-		Model        sql.NullString
-		RegisteredAt sql.NullTime
+// scanValues returns the types for scanning values from sql.Rows.
+func (*Car) scanValues() []interface{} {
+	return []interface{}{
+		&sql.NullInt64{},
+		&sql.NullString{},
+		&sql.NullTime{},
 	}
-	// the order here should be the same as in the `car.Columns`.
-	if err := rows.Scan(
-		&scanc.ID,
-		&scanc.Model,
-		&scanc.RegisteredAt,
-	); err != nil {
-		return err
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the Car fields.
+func (c *Car) assignValues(values ...interface{}) error {
+	if m, n := len(values), len(car.Columns); m != n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	value, ok := values[0].(*sql.NullInt64)
+	if !ok {
+		return fmt.Errorf("unexpected type %T for field id", value)
+	}
+	c.ID = int(value.Int64)
+	values = values[1:]
+	if value, ok := values[0].(*sql.NullString); !ok {
+		return fmt.Errorf("unexpected type %T for field model", values[0])
+	} else if value.Valid {
+		c.Model = value.String
+	}
+	if value, ok := values[1].(*sql.NullTime); !ok {
+		return fmt.Errorf("unexpected type %T for field registered_at", values[1])
+	} else if value.Valid {
+		c.RegisteredAt = value.Time
 	}
-	c.ID = scanc.ID
-	c.Model = scanc.Model.String
-	c.RegisteredAt = scanc.RegisteredAt.Time
 	return nil
 }
 
@@ -85,18 +99,6 @@ func (c *Car) String() string {
 // Cars is a parsable slice of Car.
 type Cars []*Car
 
-// FromRows scans the sql response data into Cars.
-func (c *Cars) FromRows(rows *sql.Rows) error {
-	for rows.Next() {
-		scanc := &Car{}
-		if err := scanc.FromRows(rows); err != nil {
-			return err
-		}
-		*c = append(*c, scanc)
-	}
-	return nil
-}
-
 func (c Cars) config(cfg config) {
 	for _i := range c {
 		c[_i].config = cfg

examples/start/ent/car_query.go

@@ -17,6 +17,7 @@ import (
 	"github.com/facebookincubator/ent/examples/start/ent/car"
 	"github.com/facebookincubator/ent/examples/start/ent/predicate"
 	"github.com/facebookincubator/ent/examples/start/ent/user"
+	"github.com/facebookincubator/ent/schema/field"
 )
 
 // CarQuery is the builder for querying Car entities.
@@ -278,45 +279,31 @@ func (cq *CarQuery) Select(field string, fields ...string) *CarSelect {
 }
 
 func (cq *CarQuery) sqlAll(ctx context.Context) ([]*Car, error) {
-	rows := &sql.Rows{}
-	selector := cq.sqlQuery()
-	if unique := cq.unique; len(unique) == 0 {
-		selector.Distinct()
+	var (
+		nodes []*Car
+		spec  = cq.querySpec()
+	)
+	spec.ScanValues = func() []interface{} {
+		node := &Car{config: cq.config}
+		nodes = append(nodes, node)
+		return node.scanValues()
 	}
-	query, args := selector.Query()
-	if err := cq.driver.Query(ctx, query, args, rows); err != nil {
+	spec.Assign = func(values ...interface{}) error {
+		if len(nodes) == 0 {
+			return fmt.Errorf("ent: Assign called without calling ScanValues")
+		}
+		node := nodes[len(nodes)-1]
+		return node.assignValues(values...)
+	}
+	if err := sqlgraph.QueryNodes(ctx, cq.driver, spec); err != nil {
 		return nil, err
 	}
-	defer rows.Close()
-	var cs Cars
-	if err := cs.FromRows(rows); err != nil {
-		return nil, err
-	}
-	cs.config(cq.config)
-	return cs, nil
+	return nodes, nil
 }
 
 func (cq *CarQuery) sqlCount(ctx context.Context) (int, error) {
-	rows := &sql.Rows{}
-	selector := cq.sqlQuery()
-	unique := []string{car.FieldID}
-	if len(cq.unique) > 0 {
-		unique = cq.unique
-	}
-	selector.Count(sql.Distinct(selector.Columns(unique...)...))
-	query, args := selector.Query()
-	if err := cq.driver.Query(ctx, query, args, rows); err != nil {
-		return 0, err
-	}
-	defer rows.Close()
-	if !rows.Next() {
-		return 0, errors.New("ent: no rows found")
-	}
-	var n int
-	if err := rows.Scan(&n); err != nil {
-		return 0, fmt.Errorf("ent: failed reading count: %v", err)
-	}
-	return n, nil
+	spec := cq.querySpec()
+	return sqlgraph.CountNodes(ctx, cq.driver, spec)
 }
 
 func (cq *CarQuery) sqlExist(ctx context.Context) (bool, error) {
@@ -327,6 +314,42 @@ func (cq *CarQuery) sqlExist(ctx context.Context) (bool, error) {
 	return n > 0, nil
 }
 
+func (cq *CarQuery) querySpec() *sqlgraph.QuerySpec {
+	spec := &sqlgraph.QuerySpec{
+		Node: &sqlgraph.NodeSpec{
+			Table:   car.Table,
+			Columns: car.Columns,
+			ID: &sqlgraph.FieldSpec{
+				Type:   field.TypeInt,
+				Column: car.FieldID,
+			},
+		},
+		From:   cq.sql,
+		Unique: true,
+	}
+	if ps := cq.predicates; len(ps) > 0 {
+		spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := cq.limit; limit != nil {
+		spec.Limit = *limit
+	}
+	if offset := cq.offset; offset != nil {
+		spec.Offset = *offset
+	}
+	if ps := cq.order; len(ps) > 0 {
+		spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return spec
+}
+
 func (cq *CarQuery) sqlQuery() *sql.Selector {
 	builder := sql.Dialect(cq.driver.Dialect())
 	t1 := builder.Table(car.Table)
@@ -598,7 +621,7 @@ func (cs *CarSelect) sqlScan(ctx context.Context, v interface{}) error {
 }
 
 func (cs *CarSelect) sqlQuery() sql.Querier {
-	view := "car_view"
-	return sql.Dialect(cs.driver.Dialect()).
-		Select(cs.fields...).From(cs.sql.As(view))
+	selector := cs.sql
+	selector.Select(selector.Columns(cs.fields...)...)
+	return selector
 }

examples/start/ent/car_update.go

@@ -9,7 +9,6 @@ package ent
 import (
 	"context"
 	"errors"
-	"fmt"
 	"time"
 
 	"github.com/facebookincubator/ent/dialect/sql"
@@ -324,33 +323,8 @@ func (cuo *CarUpdateOne) sqlSave(ctx context.Context) (c *Car, err error) {
 		spec.Edges.Add = append(spec.Edges.Add, edge)
 	}
 	c = &Car{config: cuo.config}
-	spec.ScanTypes = []interface{}{
-		&sql.NullInt64{},
-		&sql.NullString{},
-		&sql.NullTime{},
-	}
-	spec.Assign = func(values ...interface{}) error {
-		if m, n := len(values), len(spec.ScanTypes); m != n {
-			return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
-		}
-		value, ok := values[0].(*sql.NullInt64)
-		if !ok {
-			return fmt.Errorf("unexpected type %T for field id", value)
-		}
-		c.ID = int(value.Int64)
-		values = values[1:]
-		if value, ok := values[0].(*sql.NullString); !ok {
-			return fmt.Errorf("unexpected type %T for field model", values[0])
-		} else if value.Valid {
-			c.Model = value.String
-		}
-		if value, ok := values[1].(*sql.NullTime); !ok {
-			return fmt.Errorf("unexpected type %T for field registered_at", values[1])
-		} else if value.Valid {
-			c.RegisteredAt = value.Time
-		}
-		return nil
-	}
+	spec.Assign = c.assignValues
+	spec.ScanValues = c.scanValues()
 	if err = sqlgraph.UpdateNode(ctx, cuo.driver, spec); err != nil {
 		if cerr, ok := isSQLConstraintError(err); ok {
 			err = cerr

examples/start/ent/group.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/facebookincubator/ent/dialect/sql"
+	"github.com/facebookincubator/ent/examples/start/ent/group"
 )
 
 // Group is the model entity for the Group schema.
@@ -22,21 +23,31 @@ type Group struct {
 	Name string `json:"name,omitempty"`
 }
 
-// FromRows scans the sql response data into Group.
-func (gr *Group) FromRows(rows *sql.Rows) error {
-	var scangr struct {
-		ID   int
-		Name sql.NullString
+// scanValues returns the types for scanning values from sql.Rows.
+func (*Group) scanValues() []interface{} {
+	return []interface{}{
+		&sql.NullInt64{},
+		&sql.NullString{},
 	}
-	// the order here should be the same as in the `group.Columns`.
-	if err := rows.Scan(
-		&scangr.ID,
-		&scangr.Name,
-	); err != nil {
-		return err
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the Group fields.
+func (gr *Group) assignValues(values ...interface{}) error {
+	if m, n := len(values), len(group.Columns); m != n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	value, ok := values[0].(*sql.NullInt64)
+	if !ok {
+		return fmt.Errorf("unexpected type %T for field id", value)
+	}
+	gr.ID = int(value.Int64)
+	values = values[1:]
+	if value, ok := values[0].(*sql.NullString); !ok {
+		return fmt.Errorf("unexpected type %T for field name", values[0])
+	} else if value.Valid {
+		gr.Name = value.String
 	}
-	gr.ID = scangr.ID
-	gr.Name = scangr.Name.String
 	return nil
 }
 
@@ -77,18 +88,6 @@ func (gr *Group) String() string {
 // Groups is a parsable slice of Group.
 type Groups []*Group
 
-// FromRows scans the sql response data into Groups.
-func (gr *Groups) FromRows(rows *sql.Rows) error {
-	for rows.Next() {
-		scangr := &Group{}
-		if err := scangr.FromRows(rows); err != nil {
-			return err
-		}
-		*gr = append(*gr, scangr)
-	}
-	return nil
-}
-
 func (gr Groups) config(cfg config) {
 	for _i := range gr {
 		gr[_i].config = cfg

examples/start/ent/group_query.go

@@ -17,6 +17,7 @@ import (
 	"github.com/facebookincubator/ent/examples/start/ent/group"
 	"github.com/facebookincubator/ent/examples/start/ent/predicate"
 	"github.com/facebookincubator/ent/examples/start/ent/user"
+	"github.com/facebookincubator/ent/schema/field"
 )
 
 // GroupQuery is the builder for querying Group entities.
@@ -278,45 +279,31 @@ func (gq *GroupQuery) Select(field string, fields ...string) *GroupSelect {
 }
 
 func (gq *GroupQuery) sqlAll(ctx context.Context) ([]*Group, error) {
-	rows := &sql.Rows{}
-	selector := gq.sqlQuery()
-	if unique := gq.unique; len(unique) == 0 {
-		selector.Distinct()
+	var (
+		nodes []*Group
+		spec  = gq.querySpec()
+	)
+	spec.ScanValues = func() []interface{} {
+		node := &Group{config: gq.config}
+		nodes = append(nodes, node)
+		return node.scanValues()
 	}
-	query, args := selector.Query()
-	if err := gq.driver.Query(ctx, query, args, rows); err != nil {
+	spec.Assign = func(values ...interface{}) error {
+		if len(nodes) == 0 {
+			return fmt.Errorf("ent: Assign called without calling ScanValues")
+		}
+		node := nodes[len(nodes)-1]
+		return node.assignValues(values...)
+	}
+	if err := sqlgraph.QueryNodes(ctx, gq.driver, spec); err != nil {
 		return nil, err
 	}
-	defer rows.Close()
-	var grs Groups
-	if err := grs.FromRows(rows); err != nil {
-		return nil, err
-	}
-	grs.config(gq.config)
-	return grs, nil
+	return nodes, nil
 }
 
 func (gq *GroupQuery) sqlCount(ctx context.Context) (int, error) {
-	rows := &sql.Rows{}
-	selector := gq.sqlQuery()
-	unique := []string{group.FieldID}
-	if len(gq.unique) > 0 {
-		unique = gq.unique
-	}
-	selector.Count(sql.Distinct(selector.Columns(unique...)...))
-	query, args := selector.Query()
-	if err := gq.driver.Query(ctx, query, args, rows); err != nil {
-		return 0, err
-	}
-	defer rows.Close()
-	if !rows.Next() {
-		return 0, errors.New("ent: no rows found")
-	}
-	var n int
-	if err := rows.Scan(&n); err != nil {
-		return 0, fmt.Errorf("ent: failed reading count: %v", err)
-	}
-	return n, nil
+	spec := gq.querySpec()
+	return sqlgraph.CountNodes(ctx, gq.driver, spec)
 }
 
 func (gq *GroupQuery) sqlExist(ctx context.Context) (bool, error) {
@@ -327,6 +314,42 @@ func (gq *GroupQuery) sqlExist(ctx context.Context) (bool, error) {
 	return n > 0, nil
 }
 
+func (gq *GroupQuery) querySpec() *sqlgraph.QuerySpec {
+	spec := &sqlgraph.QuerySpec{
+		Node: &sqlgraph.NodeSpec{
+			Table:   group.Table,
+			Columns: group.Columns,
+			ID: &sqlgraph.FieldSpec{
+				Type:   field.TypeInt,
+				Column: group.FieldID,
+			},
+		},
+		From:   gq.sql,
+		Unique: true,
+	}
+	if ps := gq.predicates; len(ps) > 0 {
+		spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := gq.limit; limit != nil {
+		spec.Limit = *limit
+	}
+	if offset := gq.offset; offset != nil {
+		spec.Offset = *offset
+	}
+	if ps := gq.order; len(ps) > 0 {
+		spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return spec
+}
+
 func (gq *GroupQuery) sqlQuery() *sql.Selector {
 	builder := sql.Dialect(gq.driver.Dialect())
 	t1 := builder.Table(group.Table)
@@ -598,7 +621,7 @@ func (gs *GroupSelect) sqlScan(ctx context.Context, v interface{}) error {
 }
 
 func (gs *GroupSelect) sqlQuery() sql.Querier {
-	view := "group_view"
-	return sql.Dialect(gs.driver.Dialect()).
-		Select(gs.fields...).From(gs.sql.As(view))
+	selector := gs.sql
+	selector.Select(selector.Columns(gs.fields...)...)
+	return selector
 }

examples/start/ent/group_update.go

@@ -328,27 +328,8 @@ func (guo *GroupUpdateOne) sqlSave(ctx context.Context) (gr *Group, err error) {
 		spec.Edges.Add = append(spec.Edges.Add, edge)
 	}
 	gr = &Group{config: guo.config}
-	spec.ScanTypes = []interface{}{
-		&sql.NullInt64{},
-		&sql.NullString{},
-	}
-	spec.Assign = func(values ...interface{}) error {
-		if m, n := len(values), len(spec.ScanTypes); m != n {
-			return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
-		}
-		value, ok := values[0].(*sql.NullInt64)
-		if !ok {
-			return fmt.Errorf("unexpected type %T for field id", value)
-		}
-		gr.ID = int(value.Int64)
-		values = values[1:]
-		if value, ok := values[0].(*sql.NullString); !ok {
-			return fmt.Errorf("unexpected type %T for field name", values[0])
-		} else if value.Valid {
-			gr.Name = value.String
-		}
-		return nil
-	}
+	spec.Assign = gr.assignValues
+	spec.ScanValues = gr.scanValues()
 	if err = sqlgraph.UpdateNode(ctx, guo.driver, spec); err != nil {
 		if cerr, ok := isSQLConstraintError(err); ok {
 			err = cerr

examples/start/ent/user.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/facebookincubator/ent/dialect/sql"
+	"github.com/facebookincubator/ent/examples/start/ent/user"
 )
 
 // User is the model entity for the User schema.
@@ -24,24 +25,37 @@ type User struct {
 	Name string `json:"name,omitempty"`
 }
 
-// FromRows scans the sql response data into User.
-func (u *User) FromRows(rows *sql.Rows) error {
-	var scanu struct {
-		ID   int
-		Age  sql.NullInt64
-		Name sql.NullString
+// scanValues returns the types for scanning values from sql.Rows.
+func (*User) scanValues() []interface{} {
+	return []interface{}{
+		&sql.NullInt64{},
+		&sql.NullInt64{},
+		&sql.NullString{},
 	}
-	// the order here should be the same as in the `user.Columns`.
-	if err := rows.Scan(
-		&scanu.ID,
-		&scanu.Age,
-		&scanu.Name,
-	); err != nil {
-		return err
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the User fields.
+func (u *User) assignValues(values ...interface{}) error {
+	if m, n := len(values), len(user.Columns); m != n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	value, ok := values[0].(*sql.NullInt64)
+	if !ok {
+		return fmt.Errorf("unexpected type %T for field id", value)
+	}
+	u.ID = int(value.Int64)
+	values = values[1:]
+	if value, ok := values[0].(*sql.NullInt64); !ok {
+		return fmt.Errorf("unexpected type %T for field age", values[0])
+	} else if value.Valid {
+		u.Age = int(value.Int64)
+	}
+	if value, ok := values[1].(*sql.NullString); !ok {
+		return fmt.Errorf("unexpected type %T for field name", values[1])
+	} else if value.Valid {
+		u.Name = value.String
 	}
-	u.ID = scanu.ID
-	u.Age = int(scanu.Age.Int64)
-	u.Name = scanu.Name.String
 	return nil
 }
 
@@ -89,18 +103,6 @@ func (u *User) String() string {
 // Users is a parsable slice of User.
 type Users []*User
 
-// FromRows scans the sql response data into Users.
-func (u *Users) FromRows(rows *sql.Rows) error {
-	for rows.Next() {
-		scanu := &User{}
-		if err := scanu.FromRows(rows); err != nil {
-			return err
-		}
-		*u = append(*u, scanu)
-	}
-	return nil
-}
-
 func (u Users) config(cfg config) {
 	for _i := range u {
 		u[_i].config = cfg

examples/start/ent/user_query.go

@@ -18,6 +18,7 @@ import (
 	"github.com/facebookincubator/ent/examples/start/ent/group"
 	"github.com/facebookincubator/ent/examples/start/ent/predicate"
 	"github.com/facebookincubator/ent/examples/start/ent/user"
+	"github.com/facebookincubator/ent/schema/field"
 )
 
 // UserQuery is the builder for querying User entities.
@@ -291,45 +292,31 @@ func (uq *UserQuery) Select(field string, fields ...string) *UserSelect {
 }
 
 func (uq *UserQuery) sqlAll(ctx context.Context) ([]*User, error) {
-	rows := &sql.Rows{}
-	selector := uq.sqlQuery()
-	if unique := uq.unique; len(unique) == 0 {
-		selector.Distinct()
+	var (
+		nodes []*User
+		spec  = uq.querySpec()
+	)
+	spec.ScanValues = func() []interface{} {
+		node := &User{config: uq.config}
+		nodes = append(nodes, node)
+		return node.scanValues()
 	}
-	query, args := selector.Query()
-	if err := uq.driver.Query(ctx, query, args, rows); err != nil {
+	spec.Assign = func(values ...interface{}) error {
+		if len(nodes) == 0 {
+			return fmt.Errorf("ent: Assign called without calling ScanValues")
+		}
+		node := nodes[len(nodes)-1]
+		return node.assignValues(values...)
+	}
+	if err := sqlgraph.QueryNodes(ctx, uq.driver, spec); err != nil {
 		return nil, err
 	}
-	defer rows.Close()
-	var us Users
-	if err := us.FromRows(rows); err != nil {
-		return nil, err
-	}
-	us.config(uq.config)
-	return us, nil
+	return nodes, nil
 }
 
 func (uq *UserQuery) sqlCount(ctx context.Context) (int, error) {
-	rows := &sql.Rows{}
-	selector := uq.sqlQuery()
-	unique := []string{user.FieldID}
-	if len(uq.unique) > 0 {
-		unique = uq.unique
-	}
-	selector.Count(sql.Distinct(selector.Columns(unique...)...))
-	query, args := selector.Query()
-	if err := uq.driver.Query(ctx, query, args, rows); err != nil {
-		return 0, err
-	}
-	defer rows.Close()
-	if !rows.Next() {
-		return 0, errors.New("ent: no rows found")
-	}
-	var n int
-	if err := rows.Scan(&n); err != nil {
-		return 0, fmt.Errorf("ent: failed reading count: %v", err)
-	}
-	return n, nil
+	spec := uq.querySpec()
+	return sqlgraph.CountNodes(ctx, uq.driver, spec)
 }
 
 func (uq *UserQuery) sqlExist(ctx context.Context) (bool, error) {
@@ -340,6 +327,42 @@ func (uq *UserQuery) sqlExist(ctx context.Context) (bool, error) {
 	return n > 0, nil
 }
 
+func (uq *UserQuery) querySpec() *sqlgraph.QuerySpec {
+	spec := &sqlgraph.QuerySpec{
+		Node: &sqlgraph.NodeSpec{
+			Table:   user.Table,
+			Columns: user.Columns,
+			ID: &sqlgraph.FieldSpec{
+				Type:   field.TypeInt,
+				Column: user.FieldID,
+			},
+		},
+		From:   uq.sql,
+		Unique: true,
+	}
+	if ps := uq.predicates; len(ps) > 0 {
+		spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := uq.limit; limit != nil {
+		spec.Limit = *limit
+	}
+	if offset := uq.offset; offset != nil {
+		spec.Offset = *offset
+	}
+	if ps := uq.order; len(ps) > 0 {
+		spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return spec
+}
+
 func (uq *UserQuery) sqlQuery() *sql.Selector {
 	builder := sql.Dialect(uq.driver.Dialect())
 	t1 := builder.Table(user.Table)
@@ -611,7 +634,7 @@ func (us *UserSelect) sqlScan(ctx context.Context, v interface{}) error {
 }
 
 func (us *UserSelect) sqlQuery() sql.Querier {
-	view := "user_view"
-	return sql.Dialect(us.driver.Dialect()).
-		Select(us.fields...).From(us.sql.As(view))
+	selector := us.sql
+	selector.Select(selector.Columns(us.fields...)...)
+	return selector
 }

examples/start/ent/user_update.go

@@ -571,33 +571,8 @@ func (uuo *UserUpdateOne) sqlSave(ctx context.Context) (u *User, err error) {
 		spec.Edges.Add = append(spec.Edges.Add, edge)
 	}
 	u = &User{config: uuo.config}
-	spec.ScanTypes = []interface{}{
-		&sql.NullInt64{},
-		&sql.NullInt64{},
-		&sql.NullString{},
-	}
-	spec.Assign = func(values ...interface{}) error {
-		if m, n := len(values), len(spec.ScanTypes); m != n {
-			return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
-		}
-		value, ok := values[0].(*sql.NullInt64)
-		if !ok {
-			return fmt.Errorf("unexpected type %T for field id", value)
-		}
-		u.ID = int(value.Int64)
-		values = values[1:]
-		if value, ok := values[0].(*sql.NullInt64); !ok {
-			return fmt.Errorf("unexpected type %T for field age", values[0])
-		} else if value.Valid {
-			u.Age = int(value.Int64)
-		}
-		if value, ok := values[1].(*sql.NullString); !ok {
-			return fmt.Errorf("unexpected type %T for field name", values[1])
-		} else if value.Valid {
-			u.Name = value.String
-		}
-		return nil
-	}
+	spec.Assign = u.assignValues
+	spec.ScanValues = u.scanValues()
 	if err = sqlgraph.UpdateNode(ctx, uuo.driver, spec); err != nil {
 		if cerr, ok := isSQLConstraintError(err); ok {
 			err = cerr