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функция не описана

WC_Query::pre_get_posts() public WC 1.0

Hook into pre_get_posts to do the main product query.

{} Это метод класса: WC_Query{}

Хуков нет.

Возвращает

Null. Ничего.

Использование

$WC_Query = new WC_Query();
$WC_Query->pre_get_posts( $q );
$q(WP_Query) (обязательный)
Query instance.

Код WC_Query::pre_get_posts() WC 4.6.1

<?php
public function pre_get_posts( $q ) {
	// We only want to affect the main query.
	if ( ! $q->is_main_query() ) {
		return;
	}

	// Fixes for queries on static homepages.
	if ( $this->is_showing_page_on_front( $q ) ) {

		// Fix for endpoints on the homepage.
		if ( ! $this->page_on_front_is( $q->get( 'page_id' ) ) ) {
			$_query = wp_parse_args( $q->query );
			if ( ! empty( $_query ) && array_intersect( array_keys( $_query ), array_keys( $this->get_query_vars() ) ) ) {
				$q->is_page     = true;
				$q->is_home     = false;
				$q->is_singular = true;
				$q->set( 'page_id', (int) get_option( 'page_on_front' ) );
				add_filter( 'redirect_canonical', '__return_false' );
			}
		}

		// When orderby is set, WordPress shows posts on the front-page. Get around that here.
		if ( $this->page_on_front_is( wc_get_page_id( 'shop' ) ) ) {
			$_query = wp_parse_args( $q->query );
			if ( empty( $_query ) || ! array_diff( array_keys( $_query ), array( 'preview', 'page', 'paged', 'cpage', 'orderby' ) ) ) {
				$q->set( 'page_id', (int) get_option( 'page_on_front' ) );
				$q->is_page = true;
				$q->is_home = false;

				// WP supporting themes show post type archive.
				if ( current_theme_supports( 'woocommerce' ) ) {
					$q->set( 'post_type', 'product' );
				} else {
					$q->is_singular = true;
				}
			}
		} elseif ( ! empty( $_GET['orderby'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			$q->set( 'page_id', (int) get_option( 'page_on_front' ) );
			$q->is_page     = true;
			$q->is_home     = false;
			$q->is_singular = true;
		}
	}

	// Fix product feeds.
	if ( $q->is_feed() && $q->is_post_type_archive( 'product' ) ) {
		$q->is_comment_feed = false;
	}

	// Special check for shops with the PRODUCT POST TYPE ARCHIVE on front.
	if ( current_theme_supports( 'woocommerce' ) && $q->is_page() && 'page' === get_option( 'show_on_front' ) && absint( $q->get( 'page_id' ) ) === wc_get_page_id( 'shop' ) ) {
		// This is a front-page shop.
		$q->set( 'post_type', 'product' );
		$q->set( 'page_id', '' );

		if ( isset( $q->query['paged'] ) ) {
			$q->set( 'paged', $q->query['paged'] );
		}

		// Define a variable so we know this is the front page shop later on.
		wc_maybe_define_constant( 'SHOP_IS_ON_FRONT', true );

		// Get the actual WP page to avoid errors and let us use is_front_page().
		// This is hacky but works. Awaiting https://core.trac.wordpress.org/ticket/21096.
		global $wp_post_types;

		$shop_page = get_post( wc_get_page_id( 'shop' ) );

		$wp_post_types['product']->ID         = $shop_page->ID;
		$wp_post_types['product']->post_title = $shop_page->post_title;
		$wp_post_types['product']->post_name  = $shop_page->post_name;
		$wp_post_types['product']->post_type  = $shop_page->post_type;
		$wp_post_types['product']->ancestors  = get_ancestors( $shop_page->ID, $shop_page->post_type );

		// Fix conditional Functions like is_front_page.
		$q->is_singular          = false;
		$q->is_post_type_archive = true;
		$q->is_archive           = true;
		$q->is_page              = true;

		// Remove post type archive name from front page title tag.
		add_filter( 'post_type_archive_title', '__return_empty_string', 5 );

		// Fix WP SEO.
		if ( class_exists( 'WPSEO_Meta' ) ) {
			add_filter( 'wpseo_metadesc', array( $this, 'wpseo_metadesc' ) );
			add_filter( 'wpseo_metakey', array( $this, 'wpseo_metakey' ) );
		}
	} elseif ( ! $q->is_post_type_archive( 'product' ) && ! $q->is_tax( get_object_taxonomies( 'product' ) ) ) {
		// Only apply to product categories, the product post archive, the shop page, product tags, and product attribute taxonomies.
		return;
	}

	$this->product_query( $q );
}