我一直在用手撞墙，想弄明白这一点。

有人能向我解释一下为什么这个自定义wp\\U查询会产生两个不同的sql语句，一个用于索引页（正确），另一个用于类别页（错误）

function myFunction( $category )
{
    if(!$category) return;

    $query = array(
        \'post_type\' => \'download\',
    );

    $query[\'tax_query\'][] = array(
        \'taxonomy\' => \'download_category\',
        \'terms\' => explode( \',\', $category ),
        \'field\' => \'slug\'
    );

    $downloads = new WP_Query( $query );

    return intval($downloads->found_posts);
}

索引sql（正确）：

SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1 AND ( wp_term_relationships.term_taxonomy_id IN (20) ) AND wp_posts.post_type = \'download\' AND (wp_posts.post_status = \'publish\' OR wp_posts.post_status = \'refunded\' OR wp_posts.post_status = \'failed\' OR wp_posts.post_status = \'revoked\' OR wp_posts.post_status = \'abandoned\' OR wp_posts.post_status = \'active\' OR wp_posts.post_status = \'inactive\' OR wp_posts.post_status = \'private\') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 10

类别sql（错误）：

SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1 AND ( wp_term_relationships.term_taxonomy_id IN (15) ) AND wp_posts.post_type IN (\'nav_menu_item\', \'post\', \'eddset\') AND (wp_posts.post_status = \'publish\' OR wp_posts.post_status = \'refunded\' OR wp_posts.post_status = \'failed\' OR wp_posts.post_status = \'revoked\' OR wp_posts.post_status = \'abandoned\' OR wp_posts.post_status = \'active\' OR wp_posts.post_status = \'inactive\' OR wp_posts.post_author = 1 AND wp_posts.post_status = \'private\') GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 10

它正在忽略post\\u类型，但无法找出原因？

非常感谢您的帮助。