entc/gen: change name format for edge fks (#286)

* entc/gen: change name format for edge fks

* dialect/sql/schema: add fixture support for mysql and postgres

* sql/dialect: merge fkcolumn queries to one for the 2 dialects

examples/o2m2types/ent/migrate/schema.go

@@ -16,7 +16,7 @@ var (
 	PetsColumns = []*schema.Column{
 		{Name: "id", Type: field.TypeInt, Increment: true},
 		{Name: "name", Type: field.TypeString},
-		{Name: "owner_id", Type: field.TypeInt, Nullable: true},
+		{Name: "user_pets", Type: field.TypeInt, Nullable: true},
 	}
 	// PetsTable holds the schema information for the "pets" table.
 	PetsTable = &schema.Table{

examples/o2m2types/ent/pet.go

@@ -24,8 +24,8 @@ type Pet struct {
 	Name string `json:"name,omitempty"`
 	// Edges holds the relations/edges for other nodes in the graph.
 	// The values are being populated by the PetQuery when eager-loading is set.
-	Edges    PetEdges `json:"edges"`
-	owner_id *int
+	Edges     PetEdges `json:"edges"`
+	user_pets *int
 }
 
 // PetEdges holds the relations/edges for other nodes in the graph.
@@ -62,7 +62,7 @@ func (*Pet) scanValues() []interface{} {
 // fkValues returns the types for scanning foreign-keys values from sql.Rows.
 func (*Pet) fkValues() []interface{} {
 	return []interface{}{
-		&sql.NullInt64{}, // owner_id
+		&sql.NullInt64{}, // user_pets
 	}
 }
 
@@ -86,10 +86,10 @@ func (pe *Pet) assignValues(values ...interface{}) error {
 	values = values[1:]
 	if len(values) == len(pet.ForeignKeys) {
 		if value, ok := values[0].(*sql.NullInt64); !ok {
-			return fmt.Errorf("unexpected type %T for edge-field owner_id", value)
+			return fmt.Errorf("unexpected type %T for edge-field user_pets", value)
 		} else if value.Valid {
-			pe.owner_id = new(int)
-			*pe.owner_id = int(value.Int64)
+			pe.user_pets = new(int)
+			*pe.user_pets = int(value.Int64)
 		}
 	}
 	return nil

examples/o2m2types/ent/pet/pet.go

@@ -22,7 +22,7 @@ const (
 	// It exists in this package in order to avoid circular dependency with the "user" package.
 	OwnerInverseTable = "users"
 	// OwnerColumn is the table column denoting the owner relation/edge.
-	OwnerColumn = "owner_id"
+	OwnerColumn = "user_pets"
 )
 
 // Columns holds all SQL columns for pet fields.
@@ -33,5 +33,5 @@ var Columns = []string{
 
 // ForeignKeys holds the SQL foreign-keys that are owned by the Pet type.
 var ForeignKeys = []string{
-	"owner_id",
+	"user_pets",
 }

examples/o2m2types/ent/pet_query.go

@@ -335,7 +335,7 @@ func (pq *PetQuery) sqlAll(ctx context.Context) ([]*Pet, error) {
 		ids := make([]int, 0, len(nodes))
 		nodeids := make(map[int][]*Pet)
 		for i := range nodes {
-			if fk := nodes[i].owner_id; fk != nil {
+			if fk := nodes[i].user_pets; fk != nil {
 				ids = append(ids, *fk)
 				nodeids[*fk] = append(nodeids[*fk], nodes[i])
 			}
@@ -348,7 +348,7 @@ func (pq *PetQuery) sqlAll(ctx context.Context) ([]*Pet, error) {
 		for _, n := range neighbors {
 			nodes, ok := nodeids[n.ID]
 			if !ok {
-				return nil, fmt.Errorf(`unexpected foreign-key "owner_id" returned %v`, n.ID)
+				return nil, fmt.Errorf(`unexpected foreign-key "user_pets" returned %v`, n.ID)
 			}
 			for i := range nodes {
 				nodes[i].Edges.Owner = n

examples/o2m2types/ent/user/user.go

@@ -24,7 +24,7 @@ const (
 	// It exists in this package in order to avoid circular dependency with the "pet" package.
 	PetsInverseTable = "pets"
 	// PetsColumn is the table column denoting the pets relation/edge.
-	PetsColumn = "owner_id"
+	PetsColumn = "user_pets"
 )
 
 // Columns holds all SQL columns for user fields.

examples/o2m2types/ent/user_query.go

@@ -337,13 +337,13 @@ func (uq *UserQuery) sqlAll(ctx context.Context) ([]*User, error) {
 			return nil, err
 		}
 		for _, n := range neighbors {
-			fk := n.owner_id
+			fk := n.user_pets
 			if fk == nil {
-				return nil, fmt.Errorf(`foreign-key "owner_id" is nil for node %v`, n.ID)
+				return nil, fmt.Errorf(`foreign-key "user_pets" is nil for node %v`, n.ID)
 			}
 			node, ok := nodeids[*fk]
 			if !ok {
-				return nil, fmt.Errorf(`unexpected foreign-key "owner_id" returned %v for node %v`, *fk, n.ID)
+				return nil, fmt.Errorf(`unexpected foreign-key "user_pets" returned %v for node %v`, *fk, n.ID)
 			}
 			node.Edges.Pets = append(node.Edges.Pets, n)
 		}