WordPress как на ладони
Недорогой хостинг для сайтов на WordPress: wordpress.jino.ru
функция не описана

WC_REST_Products_V1_Controller::prepare_item_for_database() protected WC 1.0

Prepare a single product for create or update.

Это метод класса: WC_REST_Products_V1_Controller{}

Хуки из метода
Возвращает

WP_Error/stdClass. $data Post object.

Использование

// protected - в коде основоного (родительского) или дочернего класса
$result = $this->prepare_item_for_database( $request );
$request(WP_REST_Request) (обязательный)
Request object.

Код WC_REST_Products_V1_Controller::prepare_item_for_database() WC 4.5.2

woocommerce/includes/rest-api/Controllers/Version1/class-wc-rest-products-v1-controller.php
<?php
protected function prepare_item_for_database( $request ) {
	$id = isset( $request['id'] ) ? absint( $request['id'] ) : 0;

	// Type is the most important part here because we need to be using the correct class and methods.
	if ( isset( $request['type'] ) ) {
		$classname = WC_Product_Factory::get_classname_from_product_type( $request['type'] );

		if ( ! class_exists( $classname ) ) {
			$classname = 'WC_Product_Simple';
		}

		$product = new $classname( $id );
	} elseif ( isset( $request['id'] ) ) {
		$product = wc_get_product( $id );
	} else {
		$product = new WC_Product_Simple();
	}

	// Post title.
	if ( isset( $request['name'] ) ) {
		$product->set_name( wp_filter_post_kses( $request['name'] ) );
	}

	// Post content.
	if ( isset( $request['description'] ) ) {
		$product->set_description( wp_filter_post_kses( $request['description'] ) );
	}

	// Post excerpt.
	if ( isset( $request['short_description'] ) ) {
		$product->set_short_description( wp_filter_post_kses( $request['short_description'] ) );
	}

	// Post status.
	if ( isset( $request['status'] ) ) {
		$product->set_status( get_post_status_object( $request['status'] ) ? $request['status'] : 'draft' );
	}

	// Post slug.
	if ( isset( $request['slug'] ) ) {
		$product->set_slug( $request['slug'] );
	}

	// Menu order.
	if ( isset( $request['menu_order'] ) ) {
		$product->set_menu_order( $request['menu_order'] );
	}

	// Comment status.
	if ( isset( $request['reviews_allowed'] ) ) {
		$product->set_reviews_allowed( $request['reviews_allowed'] );
	}

	/**
	 * Filter the query_vars used in `get_items` for the constructed query.
	 *
	 * The dynamic portion of the hook name, $this->post_type, refers to post_type of the post being
	 * prepared for insertion.
	 *
	 * @param WC_Product       $product An object representing a single item prepared
	 *                                       for inserting or updating the database.
	 * @param WP_REST_Request $request       Request object.
	 */
	return apply_filters( "woocommerce_rest_pre_insert_{$this->post_type}", $product, $request );
}