mirror of
https://github.com/ent/ent.git
synced 2026-05-24 09:31:56 +03:00
c3955a08f1
Summary: Pull Request resolved: https://github.com/facebookincubator/ent/pull/38 Only `IsNil` and `NotNil` predicates are supported this moment Reviewed By: alexsn Differential Revision: D17444976 fbshipit-source-id: 37336fa0bc7749af995933baee2e23bb7366dd78
112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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// This source code is licensed under the Apache 2.0 license found
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// in the LICENSE file in the root directory of this source tree.
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// Code generated (@generated) by entc, DO NOT EDIT.
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package ent
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import (
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"context"
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"errors"
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"github.com/facebookincubator/ent/dialect"
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"github.com/facebookincubator/ent/dialect/gremlin"
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"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl"
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"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl/__"
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"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl/g"
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"github.com/facebookincubator/ent/dialect/sql"
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"github.com/facebookincubator/ent/entc/integration/ent/node"
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"github.com/facebookincubator/ent/entc/integration/ent/predicate"
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)
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// NodeDelete is the builder for deleting a Node entity.
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type NodeDelete struct {
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config
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predicates []predicate.Node
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}
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// Where adds a new predicate to the delete builder.
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func (nd *NodeDelete) Where(ps ...predicate.Node) *NodeDelete {
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nd.predicates = append(nd.predicates, ps...)
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return nd
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}
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// Exec executes the deletion query and returns how many vertices were deleted.
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func (nd *NodeDelete) Exec(ctx context.Context) (int, error) {
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switch nd.driver.Dialect() {
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case dialect.MySQL, dialect.SQLite:
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return nd.sqlExec(ctx)
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case dialect.Gremlin:
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return nd.gremlinExec(ctx)
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default:
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return 0, errors.New("ent: unsupported dialect")
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}
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}
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// ExecX is like Exec, but panics if an error occurs.
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func (nd *NodeDelete) ExecX(ctx context.Context) int {
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n, err := nd.Exec(ctx)
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if err != nil {
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panic(err)
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}
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return n
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}
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func (nd *NodeDelete) sqlExec(ctx context.Context) (int, error) {
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var res sql.Result
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selector := sql.Select().From(sql.Table(node.Table))
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for _, p := range nd.predicates {
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p(selector)
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}
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query, args := sql.Delete(node.Table).FromSelect(selector).Query()
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if err := nd.driver.Exec(ctx, query, args, &res); err != nil {
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return 0, err
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}
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affected, err := res.RowsAffected()
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if err != nil {
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return 0, err
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}
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return int(affected), nil
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}
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func (nd *NodeDelete) gremlinExec(ctx context.Context) (int, error) {
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res := &gremlin.Response{}
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query, bindings := nd.gremlin().Query()
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if err := nd.driver.Exec(ctx, query, bindings, res); err != nil {
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return 0, err
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}
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return res.ReadInt()
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}
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func (nd *NodeDelete) gremlin() *dsl.Traversal {
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t := g.V().HasLabel(node.Label)
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for _, p := range nd.predicates {
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p(t)
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}
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return t.SideEffect(__.Drop()).Count()
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}
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// NodeDeleteOne is the builder for deleting a single Node entity.
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type NodeDeleteOne struct {
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nd *NodeDelete
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}
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// Exec executes the deletion query.
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func (ndo *NodeDeleteOne) Exec(ctx context.Context) error {
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n, err := ndo.nd.Exec(ctx)
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switch {
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case err != nil:
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return err
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case n == 0:
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return &ErrNotFound{node.Label}
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default:
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return nil
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}
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}
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// ExecX is like Exec, but panics if an error occurs.
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func (ndo *NodeDeleteOne) ExecX(ctx context.Context) {
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ndo.nd.ExecX(ctx)
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}
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