我的问题如下：
我有一个简单的pre_get_posts操作来过滤所有网站中所有非英语的帖子：
function pre_query_languages( $query ) {
if ( is_admin() || $query->is_search() || is_single() ) {
return;
}
$tax_query = $query->get( 'tax_query' ) ?: array();
$tax_query[] = array(
'taxonomy' => 'language',
'field' => 'term_id',
'terms' => array( 28,29,30,31 ),
'operator' => 'NOT IN',
);
$query->set( 'tax_query', $tax_query );
}
add_action( 'pre_get_posts', 'pre_query_languages' );
在某些页面上，我正在加载（以AJAX格式）特定语言的帖子。但是我似乎找不到改变我的查询的方法，因此原来的tax_query被完全忽略了。
即使我使用$wp_query->set('tax_query',array());，
从[query_vars] [tax_query]中删除了tax_query，但从[tax_query]中删除了。 （请参见代码）
WP_Query Object
(
[query] => Array
(
[paged] => 1
[post_status] => publish
[suppress_filters] =>
[posts_per_page] => 8
[post_type] => press_coverage
[tax_query] => Array
(
[relation] => OR
[0] => Array
(
[taxonomy] => language
[terms] => 28
)
)
)
[query_vars] => Array
(
[paged] => 1
[post_status] => publish
[suppress_filters] =>
[posts_per_page] => 8
[post_type] => press_coverage
[tax_query] => Array
(
[relation] => OR
[0] => Array
(
[taxonomy] => language
[terms] => 28
)
//pre_get_posts tax-query is gone here
)
[error] =>
[m] =>
[p] => 0
[post_parent] =>
[subpost] =>
[subpost_id] =>
[attachment] =>
[attachment_id] => 0
[name] =>
[static] =>
[pagename] =>
[page_id] => 0
[second] =>
[minute] =>
[hour] =>
[day] => 0
[monthnum] => 0
[year] => 0
[w] => 0
[category_name] =>
[tag] =>
[cat] =>
[tag_id] =>
[author] =>
[author_name] =>
[feed] =>
[tb] =>
[meta_key] =>
[meta_value] =>
[preview] =>
[s] =>
[sentence] =>
[title] =>
[fields] =>
[menu_order] =>
[embed] =>
[category__in] => Array
(
)
[category__not_in] => Array
(
)
[category__and] => Array
(
)
[post__in] => Array
(
)
[post__not_in] => Array
(
)
[post_name__in] => Array
(
)
[tag__in] => Array
(
)
[tag__not_in] => Array
(
)
[tag__and] => Array
(
)
[tag_slug__in] => Array
(
)
[tag_slug__and] => Array
(
)
[post_parent__in] => Array
(
)
[post_parent__not_in] => Array
(
)
[author__in] => Array
(
)
[author__not_in] => Array
(
)
[ignore_sticky_posts] =>
[cache_results] => 1
[update_post_term_cache] => 1
[lazy_load_term_meta] => 1
[update_post_meta_cache] => 1
[nopaging] =>
[comments_per_page] => 50
[no_found_rows] =>
[taxonomy] => language
[term_id] => 28
[order] => DESC
)
// but not here !
[tax_query] => WP_Tax_Query Object
(
[queries] => Array
(
[relation] => OR
[0] => Array
(
[taxonomy] => language
[terms] => Array
(
[0] => 28
)
[field] => term_id
[operator] => IN
[include_children] => 1
)
[1] => Array
(
[taxonomy] => language
[terms] => Array
(
[0] => 28
[1] => 29
[2] => 30
[3] => 31
)
[field] => term_id
[operator] => NOT IN
[include_children] => 1
)
)
[relation] => OR
[table_aliases:protected] => Array
(
[0] => wpfw_term_relationships
)
[queried_terms] => Array
(
[language] => Array
(
[terms] => Array
(
[0] => 28
)
[field] => term_id
)
)
[primary_table] => wpfw_posts
[primary_id_column] => ID
)
我尝试使用get_posts，来自pre_get_posts的税收查询也处于活动状态，然后出现相同的问题。
是否有任何方法可以从查询中的pre_get_posts中覆盖税收查询（无需使用SQL），也许是在pre_get_posts操作中直接调用的条件？我是遇到错误还是做错了？