最后，我通过修改过滤器“posts\\u search”实现了上述功能。

通过使用下面的代码，您可以在woocommerce管理产品搜索区域中通过变量id搜索变量产品。

add_filter( \'posts_search\', \'product_search\' );

function product_search( $where ) {

    global $pagenow, $wpdb, $wp;

    if ( \'edit.php\' != $pagenow || ! is_search() || ! isset( $wp->query_vars[\'s\'] ) || \'product\' != $wp->query_vars[\'post_type\'] ) {
        return $where;
    }

    $search_ids = array();
    $terms      = explode( \',\', $wp->query_vars[\'s\'] );

    foreach ($terms as $term){
        if (is_numeric($term)){
            $post_type = get_post_type( $term );
            if($post_type == \'product_variation\'){
                $search_ids[]   =   wp_get_post_parent_id($term);
            }else{
               $search_ids[]   =   $term;
            }
        }
        // Attempt to get a SKU
        $sku_to_id = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_parent FROM {$wpdb->posts} LEFT JOIN {$wpdb->postmeta} ON {$wpdb->posts}.ID = {$wpdb->postmeta}.post_id WHERE meta_key=\'_sku\' AND meta_value LIKE %s;", \'%\' . $wpdb->esc_like( wc_clean( $term ) ) . \'%\' ) );
        $sku_to_id = array_merge( wp_list_pluck( $sku_to_id, \'ID\' ), wp_list_pluck( $sku_to_id, \'post_parent\' ) );

        if (sizeof($sku_to_id) > 0) {
            $search_ids = array_merge($search_ids, $sku_to_id);
        }
     }

     $search_ids = array_filter( array_unique( array_map( \'absint\', $search_ids ) ) );

    if ( sizeof( $search_ids ) > 0 ) {
        $where = str_replace( \'AND (((\', "AND ( ({$wpdb->posts}.ID IN (" . implode( \',\', $search_ids ) . ")) OR ((", $where );
    }
    return $where;
}