|string> */ public function rules(): array { return [ 'id' => 'nullable|exists:schedules,id', 'installation_date' => 'required|date', 'comment' => 'nullable|string', 'area_id' => 'nullable|exists:areas,id', 'district_id' => 'nullable|exists:districts,id', 'brigadier_id' => 'required|exists:users,id', 'object_address' => 'required|string', 'object_type' => 'required|string', 'mafs' => 'required|string', 'mafs_count' => 'required|integer', 'address_code' => 'nullable|string', ]; } }