public function saveTemporary($csv_file = null, $temporary_model = null)
	{
		$csv_file =  $csv_file ? $csv_file :  $this->csv_file;
		if( $csv_file )
		{
			$temporary_model = ($temporary_model) ? $temporary_model : new TemporaryModel();
			$temporary_model->fill(array("file_object"=>$csv_file));
			// disable query logging
			$connection_name = Config::get('laravel-import-export::baseconf.connection_name');
			DB::connection($connection_name)->disableQueryLog();
			return $temporary_model->save();
		}
		else
		{
			return false;
		}
	}