public static bool CommunityTopic_Redundent_Check(this Req_Cm_Comment comment) =>
Util.PostFilter($"CommunityTopicCache_{comment.u_id}", comment.topic_content);
public static Maybe <Req_Cm_Comment> User_Valid_Check(this Req_Cm_Comment comment)
{
var u_id = comment.u_id.ToInt();
return(u_id > 0 ? comment : None <Req_Cm_Comment> .Default);
}
