ent/examples/start/ent/group_create.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"
	"errors"
	"fmt"

	"github.com/facebookincubator/ent/dialect/sql/sqlgraph"
	"github.com/facebookincubator/ent/examples/start/ent/group"
	"github.com/facebookincubator/ent/examples/start/ent/user"
	"github.com/facebookincubator/ent/schema/field"
)

// GroupCreate is the builder for creating a Group entity.
type GroupCreate struct {
	config
	mutation *GroupMutation
	hooks    []Hook
}

// SetName sets the name field.
func (gc *GroupCreate) SetName(s string) *GroupCreate {
	gc.mutation.SetName(s)
	return gc
}

// AddUserIDs adds the users edge to User by ids.
func (gc *GroupCreate) AddUserIDs(ids ...int) *GroupCreate {
	gc.mutation.AddUserIDs(ids...)
	return gc
}

// AddUsers adds the users edges to User.
func (gc *GroupCreate) AddUsers(u ...*User) *GroupCreate {
	ids := make([]int, len(u))
	for i := range u {
		ids[i] = u[i].ID
	}
	return gc.AddUserIDs(ids...)
}

// Save creates the Group in the database.
func (gc *GroupCreate) Save(ctx context.Context) (*Group, error) {
	if _, ok := gc.mutation.Name(); !ok {
		return nil, errors.New("ent: missing required field \"name\"")
	}
	if v, ok := gc.mutation.Name(); ok {
		if err := group.NameValidator(v); err != nil {
			return nil, fmt.Errorf("ent: validator failed for field \"name\": %v", err)
		}
	}
	var (
		err  error
		node *Group
	)
	if len(gc.hooks) == 0 {
		node, err = gc.sqlSave(ctx)
	} else {
		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
			mutation, ok := m.(*GroupMutation)
			if !ok {
				return nil, fmt.Errorf("unexpected mutation type %T", m)
			}
			gc.mutation = mutation
			node, err = gc.sqlSave(ctx)
			mutation.done = true
			return node, err
		})
		for i := len(gc.hooks) - 1; i >= 0; i-- {
			mut = gc.hooks[i](mut)
		}
		if _, err := mut.Mutate(ctx, gc.mutation); err != nil {
			return nil, err
		}
	}
	return node, err
}

// SaveX calls Save and panics if Save returns an error.
func (gc *GroupCreate) SaveX(ctx context.Context) *Group {
	v, err := gc.Save(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (gc *GroupCreate) sqlSave(ctx context.Context) (*Group, error) {
	var (
		gr    = &Group{config: gc.config}
		_spec = &sqlgraph.CreateSpec{
			Table: group.Table,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeInt,
				Column: group.FieldID,
			},
		}
	)
	if value, ok := gc.mutation.Name(); ok {
		_spec.Fields = append(_spec.Fields, &sqlgraph.FieldSpec{
			Type:   field.TypeString,
			Value:  value,
			Column: group.FieldName,
		})
		gr.Name = value
	}
	if nodes := gc.mutation.UsersIDs(); len(nodes) > 0 {
		edge := &sqlgraph.EdgeSpec{
			Rel:     sqlgraph.M2M,
			Inverse: false,
			Table:   group.UsersTable,
			Columns: group.UsersPrimaryKey,
			Bidi:    false,
			Target: &sqlgraph.EdgeTarget{
				IDSpec: &sqlgraph.FieldSpec{
					Type:   field.TypeInt,
					Column: user.FieldID,
				},
			},
		}
		for _, k := range nodes {
			edge.Target.Nodes = append(edge.Target.Nodes, k)
		}
		_spec.Edges = append(_spec.Edges, edge)
	}
	if err := sqlgraph.CreateNode(ctx, gc.driver, _spec); err != nil {
		if cerr, ok := isSQLConstraintError(err); ok {
			err = cerr
		}
		return nil, err
	}
	id := _spec.ID.Value.(int64)
	gr.ID = int(id)
	return gr, nil
}