Function updateUserCacheField

model/user_cache.go:256–268

updateUserCacheField prevents individual cache refreshes from bypassing the auth-version fence. It intentionally does nothing when the complete hash is absent; the next GetUserCache call will repopulate it from the database.

(userId int, field string, value interface{})

// auth-version fence. It intentionally does nothing when the complete hash is
// absent; the next GetUserCache call will repopulate it from the database.
func updateUserCacheField(userId int, field string, value interface{}) error {
	if !common.RedisEnabled {
		return nil
	}
	var user User
	if err := DB.Select("id", "auth_version").Where("id = ?", userId).First(&user).Error; err != nil {
		return err
	}
	if user.AuthVersion <= 0 {
		return fmt.Errorf("invalid user auth version")
	}
	return updateUserCacheFieldAtVersion(userId, field, value, user.AuthVersion)
}

// GetUserLanguage returns the user's language preference from cache
// Uses the existing GetUserCache mechanism for efficiency