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// Copyright 2019-present Facebook Inc. 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"
"fmt"
"github.com/facebook/ent/dialect/gremlin"
"github.com/facebook/ent/dialect/gremlin/graph/dsl"
"github.com/facebook/ent/dialect/gremlin/graph/dsl/__"
"github.com/facebook/ent/dialect/gremlin/graph/dsl/g"
"github.com/facebook/ent/entc/integration/gremlin/ent/predicate"
"github.com/facebook/ent/entc/integration/gremlin/ent/task"
)
// TaskDelete is the builder for deleting a Task entity.
type TaskDelete struct {
config
hooks []Hook
mutation *TaskMutation
}
// Where adds a new predicate to the TaskDelete builder.
func (td *TaskDelete) Where(ps ...predicate.Task) *TaskDelete {
td.mutation.predicates = append(td.mutation.predicates, ps...)
return td
}
// Exec executes the deletion query and returns how many vertices were deleted.
func (td *TaskDelete) Exec(ctx context.Context) (int, error) {
var (
err error
affected int
)
if len(td.hooks) == 0 {
affected, err = td.gremlinExec(ctx)
} else {
var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
mutation, ok := m.(*TaskMutation)
if !ok {
return nil, fmt.Errorf("unexpected mutation type %T", m)
}
td.mutation = mutation
affected, err = td.gremlinExec(ctx)
mutation.done = true
return affected, err
})
for i := len(td.hooks) - 1; i >= 0; i-- {
mut = td.hooks[i](mut)
}
if _, err := mut.Mutate(ctx, td.mutation); err != nil {
return 0, err
}
}
return affected, err
}
// ExecX is like Exec, but panics if an error occurs.
func (td *TaskDelete) ExecX(ctx context.Context) int {
n, err := td.Exec(ctx)
if err != nil {
panic(err)
}
return n
}
func (td *TaskDelete) gremlinExec(ctx context.Context) (int, error) {
res := &gremlin.Response{}
query, bindings := td.gremlin().Query()
if err := td.driver.Exec(ctx, query, bindings, res); err != nil {
return 0, err
}
return res.ReadInt()
}
func (td *TaskDelete) gremlin() *dsl.Traversal {
t := g.V().HasLabel(task.Label)
for _, p := range td.mutation.predicates {
p(t)
}
return t.SideEffect(__.Drop()).Count()
}
// TaskDeleteOne is the builder for deleting a single Task entity.
type TaskDeleteOne struct {
td *TaskDelete
}
// Exec executes the deletion query.
func (tdo *TaskDeleteOne) Exec(ctx context.Context) error {
n, err := tdo.td.Exec(ctx)
switch {
case err != nil:
return err
case n == 0:
return &NotFoundError{task.Label}
default:
return nil
}
}
// ExecX is like Exec, but panics if an error occurs.
func (tdo *TaskDeleteOne) ExecX(ctx context.Context) {
tdo.td.ExecX(ctx)
}
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