通过PRE_GET_POST添加META_KEY导致导航消失

时间：2012-05-18 作者：Philip Downer

我正在编写一个自定义函数，允许根据自定义字段对帖子进行排序。当用户提交“排序依据”表单时，meta\\u键（以及orderby和order）参数将存储在$\\u会话变量中，根据这些参数对帖子进行排序。

我正在使用pre\\u get\\u posts操作来钩住我的函数。该函数检查$\\u会话变量是否存在，并根据需要尝试设置适当的值

add_action(\'pre_get_posts\', \'ml_order_properties\');
function ml_order_properties($query) {

    //ml_is_property() function simply returns true/false
    //if this is a property listing related page/archive/post

    if ( ml_is_property() && is_main_query() ) {
        //SET THE SORT ORDER
        $query->query_vars[\'orderby\'] = $_SESSION[\'ml_user\'][\'orderby\'][\'orderby\']; //Like \'meta_value_num\'
        $query->query_vars[\'order\'] = $_SESSION[\'ml_user\'][\'orderby\'][\'order\']; //Like \'ASC\'
        $query->query_vars[\'meta_key\'] = $_SESSION[\'ml_user\'][\'orderby\'][\'meta_key\']; //Like \'property_price\'

        //ENSURE OFF MARKET PROPERTIES ARE NOT DISPLAYED
        $args = array(
            \'taxonomy\' => \'ml_property_status\',
            \'terms\' => array(
                \'off-market\'
            ),
            \'include_children\' => true,
            \'field\' => \'slug\',
            \'operator\' => \'NOT IN\'
        );

        //ALWAY ADD TO THE END OF THE EXISTING ARRAY
        $tax_query = $query->tax_query->queries;
        $tax_count = count($tax_query) == 1 ? 1 : count($tax_query)+1;
        $tax_query[$tax_count] = $args;

        $query->set(\'tax_query\', $tax_query);
    }
}
此功能的问题在于，它会导致WordPress主导航菜单停止显示。不会生成PHP错误。转储$wp\\u query全局变量会输出以下结果：

Object
(
|    query_vars => Array (60)
|    (
|    |    [\'ml_property_type\'] = String(5) "homes"
|    |    [\'error\'] = String(0) ""
|    |    [\'m\'] = Integer(1) 0
|    |    [\'p\'] = Integer(1) 0
|    |    [\'post_parent\'] = String(0) ""
|    |    [\'subpost\'] = String(0) ""
|    |    [\'subpost_id\'] = String(0) ""
|    |    [\'attachment\'] = String(0) ""
|    |    [\'attachment_id\'] = Integer(1) 0
|    |    [\'name\'] = String(0) ""
|    |    [\'static\'] = String(0) ""
|    |    [\'pagename\'] = String(0) ""
|    |    [\'page_id\'] = Integer(1) 0
|    |    [\'second\'] = String(0) ""
|    |    [\'minute\'] = String(0) ""
|    |    [\'hour\'] = String(0) ""
|    |    [\'day\'] = Integer(1) 0
|    |    [\'monthnum\'] = Integer(1) 0
|    |    [\'year\'] = Integer(1) 0
|    |    [\'w\'] = Integer(1) 0
|    |    [\'category_name\'] = String(0) ""
|    |    [\'tag\'] = String(0) ""
|    |    [\'cat\'] = String(0) ""
|    |    [\'tag_id\'] = String(0) ""
|    |    [\'author_name\'] = String(0) ""
|    |    [\'feed\'] = String(0) ""
|    |    [\'tb\'] = String(0) ""
|    |    [\'paged\'] = Integer(1) 0
|    |    [\'comments_popup\'] = String(0) ""
|    |    [\'meta_key\'] = String(14) "property_price"
|    |    [\'meta_value\'] = String(0) ""
|    |    [\'preview\'] = String(0) ""
|    |    [\'s\'] = String(0) ""
|    |    [\'sentence\'] = String(0) ""
|    |    [\'fields\'] = String(0) ""
|    |    [\'category__in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'category__not_in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'category__and\'] => Array (0)
|    |    (
|    |    )
|    |    [\'post__in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'post__not_in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'tag__in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'tag__not_in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'tag__and\'] => Array (0)
|    |    (
|    |    )
|    |    [\'tag_slug__in\'] => Array (0)
|    |    (
|    |    )
|    |    [\'tag_slug__and\'] => Array (0)
|    |    (
|    |    )
|    |    [\'orderby\'] = String(14) "meta_value_num"
|    |    [\'order\'] = String(3) "ASC"
|    |    [\'tax_query\'] => Array (2)
|    |    (
|    |    |    [\'0\'] => Array (5)
|    |    |    (
|    |    |    |    [\'taxonomy\'] = String(16) "ml_property_type"
|    |    |    |    [\'terms\'] => Array (1)
|    |    |    |    (
|    |    |    |    |    [\'0\'] = String(5) "homes"
|    |    |    |    )
|    |    |    |    [\'include_children\'] = Boolean(1) TRUE
|    |    |    |    [\'field\'] = String(4) "slug"
|    |    |    |    [\'operator\'] = String(2) "IN"
|    |    |    )
|    |    |    [\'1\'] => Array (5)
|    |    |    (
|    |    |    |    [\'taxonomy\'] = String(18) "ml_property_status"
|    |    |    |    [\'terms\'] => Array (1)
|    |    |    |    (
|    |    |    |    |    [\'0\'] = String(10) "off-market"
|    |    |    |    )
|    |    |    |    [\'include_children\'] = Boolean(1) TRUE
|    |    |    |    [\'field\'] = String(4) "slug"
|    |    |    |    [\'operator\'] = String(6) "NOT IN"
|    |    |    )
|    |    )
|    |    [\'ignore_sticky_posts\'] = Boolean(0) FALSE
|    |    [\'suppress_filters\'] = Boolean(0) FALSE
|    |    [\'cache_results\'] = Boolean(1) TRUE
|    |    [\'update_post_term_cache\'] = Boolean(1) TRUE
|    |    [\'update_post_meta_cache\'] = Boolean(1) TRUE
|    |    [\'post_type\'] = String(0) ""
|    |    [\'posts_per_page\'] = Integer(2) 10
|    |    [\'nopaging\'] = Boolean(0) FALSE
|    |    [\'comments_per_page\'] = String(2) "50"
|    |    [\'no_found_rows\'] = Boolean(0) FALSE
|    |    [\'taxonomy\'] = String(16) "ml_property_type"
|    |    [\'term\'] = String(5) "homes"
|    )
|    tax_query Object
|    (
|    |    queries => Array (3)
|    |    (
|    |    |    [\'0\'] => Array (5)
|    |    |    (
|    |    |    |    [\'taxonomy\'] = String(16) "ml_property_type"
|    |    |    |    [\'terms\'] => Array (1)
|    |    |    |    (
|    |    |    |    |    [\'0\'] = String(5) "homes"
|    |    |    |    )
|    |    |    |    [\'include_children\'] = Boolean(1) TRUE
|    |    |    |    [\'field\'] = String(4) "slug"
|    |    |    |    [\'operator\'] = String(2) "IN"
|    |    |    )
|    |    |    [\'1\'] => Array (5)
|    |    |    (
|    |    |    |    [\'taxonomy\'] = String(18) "ml_property_status"
|    |    |    |    [\'terms\'] => Array (1)
|    |    |    |    (
|    |    |    |    |    [\'0\'] = String(10) "off-market"
|    |    |    |    )
|    |    |    |    [\'include_children\'] = Boolean(1) TRUE
|    |    |    |    [\'field\'] = String(4) "slug"
|    |    |    |    [\'operator\'] = String(6) "NOT IN"
|    |    |    )
|    |    |    [\'2\'] => Array (5)
|    |    |    (
|    |    |    |    [\'taxonomy\'] = String(16) "ml_property_type"
|    |    |    |    [\'terms\'] => Array (1)
|    |    |    |    (
|    |    |    |    |    [\'0\'] = String(5) "homes"
|    |    |    |    )
|    |    |    |    [\'include_children\'] = Boolean(1) TRUE
|    |    |    |    [\'field\'] = String(4) "slug"
|    |    |    |    [\'operator\'] = String(2) "IN"
|    |    |    )
|    |    )
|    |    relation = String(3) "AND"
|    )
|    meta_query Object
|    (
|    |    queries => Array (1)
|    |    (
|    |    |    [\'0\'] => Array (1)
|    |    |    (
|    |    |    |    [\'key\'] = String(14) "property_price"
|    |    |    )
|    |    )
|    |    relation = String(3) "AND"
|    )
|    post_count = Integer(1) 4
|    current_post = Integer(2) -1
|    in_the_loop = Boolean(0) FALSE
|    comment_count = Integer(1) 0
|    current_comment = Integer(2) -1
|    found_posts = String(1) "4"
|    max_num_pages = Float(1) 1
|    max_num_comment_pages = Integer(1) 0
|    is_single = Boolean(0) FALSE
|    is_preview = Boolean(0) FALSE
|    is_page = Boolean(0) FALSE
|    is_archive = Boolean(1) TRUE
|    is_date = Boolean(0) FALSE
|    is_year = Boolean(0) FALSE
|    is_month = Boolean(0) FALSE
|    is_day = Boolean(0) FALSE
|    is_time = Boolean(0) FALSE
|    is_author = Boolean(0) FALSE
|    is_category = Boolean(0) FALSE
|    is_tag = Boolean(0) FALSE
|    is_tax = Boolean(1) TRUE
|    is_search = Boolean(0) FALSE
|    is_feed = Boolean(0) FALSE
|    is_comment_feed = Boolean(0) FALSE
|    is_trackback = Boolean(0) FALSE
|    is_home = Boolean(0) FALSE
|    is_404 = Boolean(0) FALSE
|    is_comments_popup = Boolean(0) FALSE
|    is_paged = Boolean(0) FALSE
|    is_admin = Boolean(0) FALSE
|    is_attachment = Boolean(0) FALSE
|    is_singular = Boolean(0) FALSE
|    is_robots = Boolean(0) FALSE
|    is_posts_page = Boolean(0) FALSE
|    is_post_type_archive = Boolean(0) FALSE
|    query_vars_hash = String(32) "225f6b4c460d5ca9fc40d6cf79dcc662"
|    query_vars_changed = Boolean(1) TRUE
|    thumbnails_cached = Boolean(0) FALSE
我的直觉告诉我这个问题可能与this similar question, 但在其他方面我几乎不知所措。

该功能还检查以确保显示的帖子没有应用“ml\\U property\\U status”分类法中的“场外”slug，因为这些项目永远不应该公开显示。

注释掉函数中的以下行可以正确显示所有内容（只是不排序）

$query->query_vars[\'meta_key\'] = $_SESSION[\'ml_user\'][\'orderby\'][\'meta_key\'];

1 个回复
最合适的回答,由SO网友:mrwweb 整理而成

如果您更改if 要使用的语句$query->is_main_query() 就像上面的例子is_main_query() codex page, 这能解决问题吗？

导航菜单是通过查询创建的，因此通常此问题源于pre_get_posts 干扰菜单查询。因此，我想知道这张支票是否有效。

结束
标签： pre-get-posts   sort   小码农  

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