account := Account{Number: "account-has-one-append"}

	if err := DB.Model(&user2).Association("Account").Append(&account); err != nil {
		t.Fatalf("Error happened when append account, got %v", err)
	}

	if account.ID == 0 {
		t.Fatalf("Account's ID should be created")
	}

	user.Account = account
	CheckUser(t, user2, user)

	AssertAssociationCount(t, user, "Account", 1, "AfterAppend")

	// Replace

		"ManagerID", "Active")

	t.Run("Account", func(t *testing.T) {
		AssertObjEqual(t, user.Account, expect.Account, "ID", "CreatedAt", "UpdatedAt", "DeletedAt", "UserID", "Number")

		if user.Account.Number != "" {
			if !user.Account.UserID.Valid {
				t.Errorf("Account's foreign key should be saved")
			} else {
				var account Account
				db(unscoped).First(&account, "user_id = ?", user.ID)

		t.Errorf("UpdatedAt should be updated")
	}

	var animals []Animal
	DB.Find(&animals)
	if count := DB.Model(Animal{}).Where("1=1").Update("CreatedAt", time.Now().Add(2*time.Hour)).RowsAffected; count != int64(len(animals)) {
		t.Error("RowsAffected should be correct when do batch update")
	}

	ErrInvalidValueOfLength = errors.New("invalid association values, length doesn't match")
	// ErrPreloadNotAllowed preload is not allowed when count is used
	ErrPreloadNotAllowed = errors.New("preload is not allowed when count is used")
	// ErrDuplicatedKey occurs when there is a unique key constraint violation
	ErrDuplicatedKey = errors.New("duplicated key not allowed")