ent/examples/o2mrecur/ent/node_delete.go

// 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 by entc, DO NOT EDIT.

package ent

import (
	"context"

	"github.com/facebookincubator/ent/dialect/sql"
	"github.com/facebookincubator/ent/dialect/sql/sqlgraph"
	"github.com/facebookincubator/ent/examples/o2mrecur/ent/node"
	"github.com/facebookincubator/ent/examples/o2mrecur/ent/predicate"
	"github.com/facebookincubator/ent/schema/field"
)

// NodeDelete is the builder for deleting a Node entity.
type NodeDelete struct {
	config
	predicates []predicate.Node
}

// Where adds a new predicate to the delete builder.
func (nd *NodeDelete) Where(ps ...predicate.Node) *NodeDelete {
	nd.predicates = append(nd.predicates, ps...)
	return nd
}

// Exec executes the deletion query and returns how many vertices were deleted.
func (nd *NodeDelete) Exec(ctx context.Context) (int, error) {
	return nd.sqlExec(ctx)
}

// ExecX is like Exec, but panics if an error occurs.
func (nd *NodeDelete) ExecX(ctx context.Context) int {
	n, err := nd.Exec(ctx)
	if err != nil {
		panic(err)
	}
	return n
}

func (nd *NodeDelete) sqlExec(ctx context.Context) (int, error) {
	spec := &sqlgraph.DeleteSpec{
		Node: &sqlgraph.NodeSpec{
			Table: node.Table,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeInt,
				Column: node.FieldID,
			},
		},
	}
	if ps := nd.predicates; len(ps) > 0 {
		spec.Predicate = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector)
			}
		}
	}
	return sqlgraph.DeleteNodes(ctx, nd.driver, spec)
}

// NodeDeleteOne is the builder for deleting a single Node entity.
type NodeDeleteOne struct {
	nd *NodeDelete
}

// Exec executes the deletion query.
func (ndo *NodeDeleteOne) Exec(ctx context.Context) error {
	n, err := ndo.nd.Exec(ctx)
	switch {
	case err != nil:
		return err
	case n == 0:
		return &ErrNotFound{node.Label}
	default:
		return nil
	}
}

// ExecX is like Exec, but panics if an error occurs.
func (ndo *NodeDeleteOne) ExecX(ctx context.Context) {
	ndo.nd.ExecX(ctx)
}