linyerun / instant_messaging_system

即时通信系统

im_system

gorm

• 获取记录数为0, 再获取error会出现err != nil
• 设置零值使用default

type Friend struct {
	Email01   string    `gorm:"column:email01"`
	Email02   string    `gorm:"column:email02"`
	RoomId    uint      `gorm:"column:room_id"`
	CreatedAt time.Time `gorm:"column:created_at"`
	DeletedAt time.Time `gorm:"column:deleted_at;default:NULL"` // 设置默认值
}

• 使用 first获取一条参数

func GetUserByEmail(email string) (user *models.User, err error) {
	user = new(models.User)
	err = MySQLClient.First(user, "email = ?", email).Error
	return
}