def get_by_alias_key(alias_key)
      klass = self.name.constantize
      if RedisModelExtension::Database.redis.exists(alias_key)
        out = []
        RedisModelExtension::Database.redis.smembers(alias_key).each do |key|
          item = klass.new_by_key(key)
          out << item if item
        end
        return out
      end
      nil
    end
def get_by_alias_key(alias_key)
      klass = self.name.constantize
      if RedisModelExtension::Database.redis.exists(alias_key)
        out = []
        RedisModelExtension::Database.redis.smembers(alias_key).each do |key|
          item = klass.new_by_key(key)
          out << item if item
        end
        return out
      end
      nil
    end
fastest method to get object from redis by getting it by alias and arguments