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// Copyright (c) Facebook, Inc. and its affiliates. 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 (@generated) by entc, DO NOT EDIT.
package ent
import (
"context"
"errors"
"github.com/facebookincubator/ent/dialect"
"github.com/facebookincubator/ent/dialect/gremlin"
"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl"
"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl/__"
"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl/g"
"github.com/facebookincubator/ent/dialect/sql"
"github.com/facebookincubator/ent/entc/integration/ent/card"
"github.com/facebookincubator/ent/entc/integration/ent/predicate"
)
// CardDelete is the builder for deleting a Card entity.
type CardDelete struct {
config
predicates []predicate.Card
}
// Where adds a new predicate to the delete builder.
func (cd *CardDelete) Where(ps ...predicate.Card) *CardDelete {
cd.predicates = append(cd.predicates, ps...)
return cd
}
// Exec executes the deletion query and returns how many vertices were deleted.
func (cd *CardDelete) Exec(ctx context.Context) (int, error) {
switch cd.driver.Dialect() {
case dialect.MySQL, dialect.Postgres, dialect.SQLite:
return cd.sqlExec(ctx)
case dialect.Gremlin:
return cd.gremlinExec(ctx)
default:
return 0, errors.New("ent: unsupported dialect")
}
}
// ExecX is like Exec, but panics if an error occurs.
func (cd *CardDelete) ExecX(ctx context.Context) int {
n, err := cd.Exec(ctx)
if err != nil {
panic(err)
}
return n
}
func (cd *CardDelete) sqlExec(ctx context.Context) (int, error) {
var (
res sql.Result
builder = sql.Dialect(cd.driver.Dialect())
)
selector := builder.Select().From(sql.Table(card.Table))
for _, p := range cd.predicates {
p(selector)
}
query, args := builder.Delete(card.Table).FromSelect(selector).Query()
if err := cd.driver.Exec(ctx, query, args, &res); err != nil {
return 0, err
}
affected, err := res.RowsAffected()
if err != nil {
return 0, err
}
return int(affected), nil
}
func (cd *CardDelete) gremlinExec(ctx context.Context) (int, error) {
res := &gremlin.Response{}
query, bindings := cd.gremlin().Query()
if err := cd.driver.Exec(ctx, query, bindings, res); err != nil {
return 0, err
}
return res.ReadInt()
}
func (cd *CardDelete) gremlin() *dsl.Traversal {
t := g.V().HasLabel(card.Label)
for _, p := range cd.predicates {
p(t)
}
return t.SideEffect(__.Drop()).Count()
}
// CardDeleteOne is the builder for deleting a single Card entity.
type CardDeleteOne struct {
cd *CardDelete
}
// Exec executes the deletion query.
func (cdo *CardDeleteOne) Exec(ctx context.Context) error {
n, err := cdo.cd.Exec(ctx)
switch {
case err != nil:
return err
case n == 0:
return &ErrNotFound{card.Label}
default:
return nil
}
}
// ExecX is like Exec, but panics if an error occurs.
func (cdo *CardDeleteOne) ExecX(ctx context.Context) {
cdo.cd.ExecX(ctx)
}
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