examples: regenerate assets

Closes #261

examples/m2mbidi/ent/user.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/facebookincubator/ent/dialect/sql"
+	"github.com/facebookincubator/ent/examples/m2mbidi/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
 }
 
@@ -84,18 +98,6 @@ 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/m2mbidi/ent/user_query.go

@@ -16,6 +16,7 @@ import (
 	"github.com/facebookincubator/ent/dialect/sql/sqlgraph"
 	"github.com/facebookincubator/ent/examples/m2mbidi/ent/predicate"
 	"github.com/facebookincubator/ent/examples/m2mbidi/ent/user"
+	"github.com/facebookincubator/ent/schema/field"
 )
 
 // UserQuery is the builder for querying User entities.
@@ -277,45 +278,31 @@ 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) {
@@ -326,6 +313,42 @@ 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)
@@ -597,7 +620,7 @@ 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/m2mbidi/ent/user_update.go

@@ -8,7 +8,6 @@ package ent
 
 import (
 	"context"
-	"fmt"
 
 	"github.com/facebookincubator/ent/dialect/sql"
 	"github.com/facebookincubator/ent/dialect/sql/sqlgraph"
@@ -383,33 +382,8 @@ 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