def alias_exists? alias_name, args = {}
      RedisModelExtension::Database.redis.exists(self.name.constantize.generate_alias_key(alias_name, args))
    end
def alias_exists? alias_name, args = {}
      RedisModelExtension::Database.redis.exists(self.name.constantize.generate_alias_key(alias_name, args))
    end
Check if key by alias name and arguments exists in db