model("credit_sheet"); return $oCredit_sheet->save($data); } function gen_id(){ $oCredit_sheet = app::get('purchase')->model("credit_sheet"); return $oCredit_sheet->gen_id(); } function isCredit($po_id){ $oCredit_sheet = app::get('purchase')->model("credit_sheet"); return $oCredit_sheet->isCredit($po_id); } } ?>