entity

type Book struct {
	ID        int64     `column:"id" option:"pk" json:"id"`
	Title     string    `column:"title" json:"title" validate:"required"`
	Author    string    `column:"author" json:"author" validate:"required"`
	UpdatedAt time.Time `column:"updated_at" option:"now" json:"update_at"`
	CreatedAt time.Time `column:"created_at" option:"now,no_update" json:"created_at"`
}

type Song struct {
	ID        int64     `column:"id" option:"pk" json:"id"`
	Title     string    `column:"title" json:"title" validate:"required"`
	Artist    string    `column:"artist" json:"artist" validate:"required"`
	UpdatedAt time.Time `column:"updated_at" option:"now" json:"update_at"`
	CreatedAt time.Time `column:"created_at" option:"now,no_update" json:"created_at"`
}