* - jerr() will stop insert.. (Prefered)
* - return false for fail and set DO->err;
* - beforeUpdate($old, $request,$roo) - after update - jerr() will stop insert..
* - jerr() will stop insert.. (Prefered)
* - return false for fail and set DO->err;
* - beforeUpdate($old, $request,$roo) - after update - jerr() will stop insert..