package callbacks

import (
	"gorm.io/gorm"
)

func BeginTransaction(db *gorm.DB) {
	if !db.Config.SkipDefaultTransaction && db.Error == nil {
		if tx := db.Begin(); tx.Error == nil {
			db.Statement.ConnPool = tx.Statement.ConnPool
			db.InstanceSet("gorm:started_transaction", true)
		} else if tx.Error == gorm.ErrInvalidTransaction {
			tx.Error = nil
		} else {
			db.Error = tx.Error
		}
	}
}

				if db.AddError(tx.Clauses(clause.Where{Exprs: queryConds}).Delete(modelValue).Error) != nil {
					return
				}
			}
		}

	}
}

func Delete(config *Config) func(db *gorm.DB) {
	supportReturning := utils.Contains(config.DeleteClauses, "RETURNING")

	return func(db *gorm.DB) {
		if db.Error != nil {
			return
		}

		if db.Statement.Schema != nil {

package tests_test

import (
	"testing"

	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

func TestUpdateBelongsTo(t *testing.T) {
	user := *GetUser("update-belongs-to", Config{})

	if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	user.Company = Company{Name: "company-belongs-to-association"}
	user.Manager = &User{Name: "manager-belongs-to-association"}

import (
	"testing"

	"gorm.io/driver/mysql"

	"gorm.io/gorm"
)

func TestOpen(t *testing.T) {
	dsn := "gorm:gorm@tcp(localhost:9910)/gorm?loc=Asia%2FHongKong" // invalid loc
	_, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
	if err == nil {
		t.Fatalf("should returns error but got nil")
	}
}

func TestReturningWithNullToZeroValues(t *testing.T) {
	dialect := DB.Dialector.Name()
	switch dialect {
	case "mysql", "sqlserver":

	}

	if config.Company {
		user.Company = Company{Name: "company-" + name}
	}

	if config.Manager {
		user.Manager = GetUser(name+"_manager", Config{})
	}

	for i := 0; i < config.Team; i++ {
		user.Team = append(user.Team, *GetUser(name+"_team_"+strconv.Itoa(i+1), Config{}))
	}

	for i := 0; i < config.Languages; i++ {
		name := name + "_locale_" + strconv.Itoa(i+1)

		t.Errorf("account's number should not be saved")
	}
}

func TestHasOneAssociationForSlice(t *testing.T) {
	users := []User{
		*GetUser("slice-hasone-1", Config{Account: true}),
		*GetUser("slice-hasone-2", Config{Account: false}),
		*GetUser("slice-hasone-3", Config{Account: true}),
	}

	DB.Create(&users)

	// Count
	AssertAssociationCount(t, users, "Account", 2, "")

	// Find
	var accounts []Account

package tests_test

import (
	"testing"

	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

func TestUpdateMany2ManyAssociations(t *testing.T) {
	user := *GetUser("update-many2many", Config{})

	if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	user.Languages = []Language{{Code: "zh-CN", Name: "Chinese"}, {Code: "en", Name: "English"}}
	for _, lang := range user.Languages {

	}
	if len(config.QueryClauses) == 0 {
		config.QueryClauses = queryClauses
	}
	if len(config.DeleteClauses) == 0 {
		config.DeleteClauses = deleteClauses
	}
	if len(config.UpdateClauses) == 0 {
		config.UpdateClauses = updateClauses
	}

	createCallback := db.Callback().Create()
	createCallback.Match(enableTransaction).Register("gorm:begin_transaction", BeginTransaction)
	createCallback.Register("gorm:before_create", BeforeCreate)

import (
	"errors"
	"testing"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	. "gorm.io/gorm/utils/tests"
)

func TestDelete(t *testing.T) {
	users := []User{*GetUser("delete", Config{}), *GetUser("delete", Config{}), *GetUser("delete", Config{})}

	if err := DB.Create(&users).Error; err != nil {
		t.Errorf("errors happened when create: %v", err)
	}

	for _, user := range users {
		if user.ID == 0 {

		GetUser("manager-slice-belongs-to-1", Config{}),
		GetUser("manager-slice-belongs-to-2", Config{}),
		GetUser("manager-slice-belongs-to-3", Config{}),
	)
	AssertAssociationCount(t, users, "Manager", 3, "After Append")

	if err := DB.Model(&users).Association("Manager").Append(
		GetUser("manager-slice-belongs-to-test-1", Config{}),
	).Error; err == nil {