WP_REST_Attachments_Controller::update_item( WP_REST_Request $request ): WP_REST_Response|WP_Error

399	public function update_item( $request ) {400		if ( ! empty( $request['post'] ) && in_array( get_post_type( $request['post'] ), array( 'revision', 'attachment' ), true ) ) {401			return new WP_Error(402				'rest_invalid_param',403				__( 'Invalid parent type.' ),404				array( 'status' => 400 )405			);406		}407 408		$attachment_before = get_post( $request['id'] );409		$response          = parent::update_item( $request );410 411		if ( is_wp_error( $response ) ) {412			return $response;413		}414 415		$response = rest_ensure_response( $response );416		$data     = $response->get_data();417 418		if ( isset( $request['alt_text'] ) ) {419			update_post_meta( $data['id'], '_wp_attachment_image_alt', $request['alt_text'] );420		}421 422		$attachment = get_post( $request['id'] );423 424		if ( ! empty( $schema['properties']['featured_media'] ) && isset( $request['featured_media'] ) ) {425			$thumbnail_update = $this->handle_featured_media( $request['featured_media'], $attachment->ID );426 427			if ( is_wp_error( $thumbnail_update ) ) {428				return $thumbnail_update;429			}430		}431 432		$fields_update = $this->update_additional_fields_for_object( $attachment, $request );433 434		if ( is_wp_error( $fields_update ) ) {435			return $fields_update;436		}437 438		$request->set_param( 'context', 'edit' );439 440		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php */441		do_action( 'rest_after_insert_attachment', $attachment, $request, false );442 443		wp_after_insert_post( $attachment, true, $attachment_before );444 445		$response = $this->prepare_item_for_response( $attachment, $request );446		$response = rest_ensure_response( $response );447 448		return $response;449	}