public function operation($personid, $operationid)
 {
     $person = Person::findOrFail($personid);
     list($operations, $summ, $books) = Operation::get_all_operations($personid, $operationid);
     $operation_type_name = Operation::operation_type_name($personid);
     $book_names_by_id = Operation::book_names_by_id();
     return view('persons.operation', ['operations' => $operations, 'person' => $person, 'summ' => $summ, 'books' => $books, 'operation_type_name' => $operation_type_name, 'book_names_by_id' => $book_names_by_id]);
 }