产品变体WP_Query与Woocommerce中的产品类别

Question

通过Woocommerce,我正在尝试使用产品类别"Apple"为产品变体发布类型的WP_Query.

$args = array(
    'product_cat'    => 'Apple',
    'post_type'      => array('product', 'product_variation'),
    'post_status'    => 'publish',
    'key'            => '_visibility',
    'value'          => 'visible',
    'posts_per_page' => 100,
    'taxonomy'       => 'pa_size',
    'meta_value'     => '39',
    'meta_query'     => array(
        array(
            'key'         => '_stock',
            'value'       => 0,
            'compare'     => '>'
        )
    )
);

但我无法在此查询中使用它.如果我删除'product_cat' => 'Apple',查询工作.为什么？

Answer 1

WP_Query关于Woocommerce产品有很多错误:

• 对于产品类别和产品属性,您应该更好地使用tax_query.
• 对于产品可见性,自Woocommerce 3以来,它由product_visibility分类'exclude-from-search'和'exclude-from-catalog'术语处理.

关于产品变化的重要说明:

• 产品类别(或产品标记)是没有处理由产品的变化,但由父变量产物
• 变奏曲产品属性处理后元数据与meta_key由"前缀attribute_"和met_value那就是长期塞.
• 产品可见性不会在产品变体中处理,因为它们不会显示在存档页面中.
• 它们不会显示在存档页面中(如前所述).

因此,当使用a时WP_Query,您不能同时查询 "产品"帖子类型和"product_variation"帖子类型,因为它们确实不同.

要使您的查询适用于"product_variation"帖子类型,您需要一个小实用程序函数来获取产品类别的父变量产品(或任何自定义分类作为产品标签...):

// Utility function to get the parent variable product IDs for a any term of a taxonomy
function get_variation_parent_ids_from_term( $term, $taxonomy, $type ){
    global $wpdb;

    return $wpdb->get_col( "
        SELECT DISTINCT p.ID
        FROM {$wpdb->prefix}posts as p
        INNER JOIN {$wpdb->prefix}posts as p2 ON p2.post_parent = p.ID
        INNER JOIN {$wpdb->prefix}term_relationships as tr ON p.ID = tr.object_id
        INNER JOIN {$wpdb->prefix}term_taxonomy as tt ON tr.term_taxonomy_id = tt.term_taxonomy_id
        INNER JOIN {$wpdb->prefix}terms as t ON tt.term_id = t.term_id
        WHERE p.post_type = 'product'
        AND p.post_status = 'publish'
        AND p2.post_status = 'publish'
        AND tt.taxonomy = '$taxonomy'
        AND t.$type = '$term'
    " );
}

代码位于活动子主题(或活动主题)的function.php文件中.经过测试和工作.必要的WP_Query下方 ...

这里WP_Query代码用于产品的变化 (仅)与特定产品类别和具体的变化属性值:

// Settings
$cat_name = 'Apple'; // Product category name
$attr_taxonomy = 'pa_size'; // Product attribute
$attribute_term_slugs = array('39'); // <== Need to be term SLUGs

$query = new WP_Query( array(
    'post_type'       => 'product_variation',
    'post_status'     => 'publish',
    'posts_per_page'  => 100,
    'post_parent__in' => get_variation_parent_ids_from_term( $cat_name, 'product_cat', 'name' ), // Variations
    'meta_query'      => array(
        'relation'    => 'AND',
        array(
            'key'     => '_stock',
            'value'   => 0,
            'compare' => '>'
        ),
        array( 
            'key'     => 'attribute_'.$attr_taxonomy, // Product variation attribute
            'value'   => $attribute_term_slugs, // Term slugs only
            'compare' => 'IN',
        ),
    ),
) );

// Display the queried products count
echo '<p>Product count: ' . $query->post_count . '<p>';

// Displaying raw output for posts
print_pr($query->posts);

经过测试和工作.