DB.Model(&users).Association("Pets").Append(
		&Pet{Name: "pet-slice-append-1"},
		[]*Pet{{Name: "pet-slice-append-2-1"}, {Name: "pet-slice-append-2-2"}},
		&Pet{Name: "pet-slice-append-3"},
	)

	AssertAssociationCount(t, users, "Pets", 10, "After Append")

	// Replace -> same as append
	DB.Model(&users).Association("Pets").Replace(
		[]*Pet{{Name: "pet-slice-replace-1-1"}, {Name: "pet-slice-replace-1-2"}},

		"name": "jinzhu",
		"age":  18,
	})

	assignments := []clause.Assignment(set)

	sort.Slice(assignments, func(i, j int) bool {
		return strings.Compare(assignments[i].Column.Name, assignments[j].Column.Name) > 0
	})

	if len(assignments) != 2 || assignments[0].Column.Name != "name" || assignments[0].Value.(string) != "jinzhu" || assignments[1].Column.Name != "age" || assignments[1].Value.(int) != 18 {

			"SELECT * FROM `users` WHERE name = ? AND `users`.`deleted_at` IS NULL ORDER BY `users`.`id` LIMIT ?",
			"INSERT INTO `users` (`created_at`,`updated_at`,`deleted_at`,`name`,`age`,`birthday`,`company_id`,`manager_id`,`active`) VALUES (?,?,?,?,?,?,?,?,?)",

type Insert struct {
	Table    Table
	Modifier string
}

// Name insert clause name
func (insert Insert) Name() string {
	return "INSERT"
}

// Build build insert clause
func (insert Insert) Build(builder Builder) {
	if insert.Modifier != "" {
		builder.WriteString(insert.Modifier)
		builder.WriteByte(' ')
	}

	builder.WriteString("INTO ")
	if insert.Table.Name == "" {
		builder.WriteQuoted(currentTable)
	} else {

		Result  string
		Vars    []interface{}
	}{
		{
			[]clause.Interface{
				clause.Insert{},
				clause.Values{
					Columns: []clause.Column{{Name: "name"}, {Name: "age"}},
					Values:  [][]interface{}{{"jinzhu", 18}, {"josh", 1}},
				},
			},
			"INSERT INTO `users` (`name`,`age`) VALUES (?,?),(?,?)",
			[]interface{}{"jinzhu", 18, "josh", 1},
		},
	}

	for idx, result := range results {

package clause

// Limit limit clause
type Limit struct {
	Limit  *int
	Offset int
}

// Name where clause name
func (limit Limit) Name() string {
	return "LIMIT"
}

// Build build where clause
func (limit Limit) Build(builder Builder) {
	if limit.Limit != nil && *limit.Limit >= 0 {
		builder.WriteString("LIMIT ")
		builder.AddVar(builder, *limit.Limit)
	}
	if limit.Offset > 0 {

		}
	}()
	if err := tx.Error; err != nil {
		t.Errorf("Failed to start transaction, got error %v\n", err)
	}

	if err := tx.Where("name=?", "zzjin").Delete(&User{}).Error; err != nil {
		tx.Rollback()
		t.Errorf("Failed to run one transaction, got error %v\n", err)
	}

	if err := tx.Create(&User{Name: "zzjin"}).Error; err != nil {
		tx.Rollback()
		t.Errorf("Failed to run one transaction, got error %v\n", err)
	}

package clause

type Returning struct {
	Columns []Column
}

// Name where clause name
func (returning Returning) Name() string {
	return "RETURNING"
}

// Build build where clause
func (returning Returning) Build(builder Builder) {
	if len(returning.Columns) > 0 {
		for idx, column := range returning.Columns {
			if idx > 0 {
				builder.WriteByte(',')
			}

			builder.WriteQuoted(column)
		}
	} else {

		user.Account.UpdatedAt = user4.Account.UpdatedAt
		CheckUser(t, user4, user)
	}

	t.Run("Polymorphic", func(t *testing.T) {
		pet := Pet{Name: "create"}

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

		pet.Toy = Toy{Name: "Update-HasOneAssociation-Polymorphic"}

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

package clause

type OrderByColumn struct {
	Column  Column
	Desc    bool
	Reorder bool
}

type OrderBy struct {
	Columns    []OrderByColumn
	Expression Expression
}

// Name where clause name
func (orderBy OrderBy) Name() string {
	return "ORDER BY"
}

// Build build where clause
func (orderBy OrderBy) Build(builder Builder) {
	if orderBy.Expression != nil {
		orderBy.Expression.Build(builder)
	} else {