belongsTo('App\Order','order_id','id'); } public function commodities(){ return $this->hasMany('App\OrderPackageCommodities','order_package_id','id'); } public function paperBox(){ return $this->hasOne('App\PaperBox','id','paper_box_id'); } public function measuringMachine(){ return $this->hasOne('App\MeasuringMachine','id','measuring_machine_id'); } public function delete() { $this->commodities()->delete(); return parent::delete(); } public function deleteSafe(){ return parent::delete(); } }