Function GetUsernameById

model/user.go:782–807

GetUsernameById gets username from Redis first, falls back to DB if needed

(id int, fromDB bool)

// GetUsernameById gets username from Redis first, falls back to DB if needed
func GetUsernameById(id int, fromDB bool) (username string, err error) {
	defer func() {
		// Update Redis cache asynchronously on successful DB read
		if shouldUpdateRedis(fromDB, err) {
			gopool.Go(func() {
				if err := updateUserNameCache(id, username); err != nil {
					common.SysError("failed to update user name cache: " + err.Error())
				}
			})
		}
	}()
	if !fromDB && common.RedisEnabled {
		username, err := getUserNameCache(id)
		if err == nil {
			return username, nil
		}
		// Don't return error - fall through to DB
	}
	fromDB = true
	err = DB.Model(&User{}).Where("id = ?", id).Select("username").Find(&username).Error
	if err != nil {
		return "", err
	}

	return username, nil
}

func IsLinuxDOIdAlreadyTaken(linuxDOId string) bool {
	var user User