|string> */ public function rules(): array { return [ 'tour_id' => [ 'nullable', 'exists:tours,id', 'required_without:flight_id', ], 'flight_id' => [ 'nullable', 'exists:flights,id', 'required_without:tour_id', ], 'rating' => [ 'required', 'integer', 'min:1', 'max:5', ], 'comment' => [ 'nullable', 'string', 'max:1000', ], ]; } }