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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/file"
"github.com/facebookincubator/ent/entc/integration/ent/predicate"
)
// FileDelete is the builder for deleting a File entity.
type FileDelete struct {
config
predicates []predicate.File
}
// Where adds a new predicate to the delete builder.
func (fd *FileDelete) Where(ps ...predicate.File) *FileDelete {
fd.predicates = append(fd.predicates, ps...)
return fd
}
// Exec executes the deletion query and returns how many vertices were deleted.
func (fd *FileDelete) Exec(ctx context.Context) (int, error) {
switch fd.driver.Dialect() {
case dialect.MySQL, dialect.Postgres, dialect.SQLite:
return fd.sqlExec(ctx)
case dialect.Gremlin:
return fd.gremlinExec(ctx)
default:
return 0, errors.New("ent: unsupported dialect")
}
}
// ExecX is like Exec, but panics if an error occurs.
func (fd *FileDelete) ExecX(ctx context.Context) int {
n, err := fd.Exec(ctx)
if err != nil {
panic(err)
}
return n
}
func (fd *FileDelete) sqlExec(ctx context.Context) (int, error) {
var (
res sql.Result
builder = sql.Dialect(fd.driver.Dialect())
)
selector := builder.Select().From(sql.Table(file.Table))
for _, p := range fd.predicates {
p(selector)
}
query, args := builder.Delete(file.Table).FromSelect(selector).Query()
if err := fd.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 (fd *FileDelete) gremlinExec(ctx context.Context) (int, error) {
res := &gremlin.Response{}
query, bindings := fd.gremlin().Query()
if err := fd.driver.Exec(ctx, query, bindings, res); err != nil {
return 0, err
}
return res.ReadInt()
}
func (fd *FileDelete) gremlin() *dsl.Traversal {
t := g.V().HasLabel(file.Label)
for _, p := range fd.predicates {
p(t)
}
return t.SideEffect(__.Drop()).Count()
}
// FileDeleteOne is the builder for deleting a single File entity.
type FileDeleteOne struct {
fd *FileDelete
}
// Exec executes the deletion query.
func (fdo *FileDeleteOne) Exec(ctx context.Context) error {
n, err := fdo.fd.Exec(ctx)
switch {
case err != nil:
return err
case n == 0:
return &ErrNotFound{file.Label}
default:
return nil
}
}
// ExecX is like Exec, but panics if an error occurs.
func (fdo *FileDeleteOne) ExecX(ctx context.Context) {
fdo.fd.ExecX(ctx)
}
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