example

type User struct {
	ID        int64     `gom:"id,primary_key,auto_increment"`
	Username  string    `gom:"username,size:50,not_null,unique"`
	Email     string    `gom:"email,size:100,not_null,unique"`
	Age       int       `gom:"age"`
	Active    bool      `gom:"active,default:true"`
	Role      string    `gom:"role,size:20,default:'user'"`
	CreatedAt time.Time `gom:"created_at,not_null"`
	UpdatedAt time.Time `gom:"updated_at,not_null"`
}