通过一个自定义字段过滤，按另一个定制字段订购？

Question

我有一个自定义帖子类型“列表”，我想获得具有自定义字段的所有列表 gateway_value != 'Yes', ，并通过另一个自定义字段订购结果， location_level1_value. 。我可以将查询分开工作，但我不能将它们结合在一起：

查询1（按位置排序）：

                $wp_query = new WP_Query( array (
                    'post_type' => 'listing',
                    'post_status' => 'publish',
                    'posts_per_page' => '9',
                    'meta_key' => 'location_level1_value',
                    'orderby' => 'location_level1_value',
                    'order' => 'ASC',
                    'paged' => $paged
                    )
                 );

查询2（自定义字段值！= yes）：

                $wp_query = new WP_Query( array (
                    'post_type' => 'listing',
                    'posts_per_page' => '9',
                    'post_status' => 'publish',
                    'meta_key' => 'gateway_value',
                    'meta_value' => 'Yes',
                    'meta_compare' => '!=',
                    'paged' => $paged
                    )
                );

合并查询：

我看着 法典 为此提供帮助，但是以下查询不起作用：

                $wp_query = new WP_Query( array (
                    'post_type' => 'listing',
                    'posts_per_page' => '9',
                    'post_status' => 'publish',
                    'meta_query' => array(
                        array(
                            'key' => 'gateway_value',
                            'value' => 'Yes',
                            'compare' => '!='
                        ),
                        array(
                            'key' => 'location_level1_value'
                        )
                    ),
                    'orderby' => "location_level1_value",
                    'order' => 'ASC',
                    'paged' => $paged
                    )
                );

我在合并的查询中做错了什么？

更新]：因此，现在已发布3.1，上面的组合查询仍然不起作用。我确实得到结果，只是无法正确排序。

更新]： var_dump($wp_query->request) 给出以下内容：
string(527) " SELECT SQL_CALC_FOUND_ROWS wp_7v1oev_posts.* FROM wp_7v1oev_posts INNER JOIN wp_7v1oev_postmeta ON (wp_7v1oev_posts.ID = wp_7v1oev_postmeta.post_id) INNER JOIN wp_7v1oev_postmeta AS mt1 ON (wp_7v1oev_posts.ID = mt1.post_id) WHERE 1=1 AND wp_7v1oev_posts.post_type = 'listing' AND (wp_7v1oev_posts.post_status = 'publish') AND wp_7v1oev_postmeta.meta_key = 'gateway_value' AND CAST(wp_7v1oev_postmeta.meta_value AS CHAR) != 'Yes' AND mt1.meta_key = 'location_level1_value' ORDER BY wp_7v1oev_posts.post_date DESC LIMIT 0, 9"

Answer 1

您可以使用查询来通过使用过滤选项的“ meta_query”来过滤内容，并且对于顺序零件，只需添加/修改以下参数：

• 'orderby'=>'meta_value'
• 'meta_key'=>'location_level1_value'

• 'order'=>'asc'

  $wp_query = new WP_Query( array (
      'post_type'      => 'listing',
      'posts_per_page' => '9',
      'post_status'    => 'publish',
      'meta_query'     => array(
          array(
              'key'       => 'gateway_value',
              'value'     => 'Yes',
              'compare'   => '!='
          )
      ),
      'orderby'  => 'meta_value',            // this means we will be using a selected 
                                             // meta field to order
  
      'meta_key' => 'location_level1_value', // this states which meta field 
                                             // will be used in the ordering, 
                                             // regardless of the filters
      'order'    => 'ASC',
      'paged'    => $paged
      )
  );
  

Answer 2

就像Jan在新的WordPress 3.1中所说的那样，您可以使用 meta_query 但是，在此之前，您可以使用第一个查询来订购和过滤您的循环中：

 Global $my_query;
$my_query = new WP_Query( array (
                    'post_type' => 'listing',
                    'post_status' => 'publish',
                    'posts_per_page' => '9',
                    'meta_key' => 'location_level1_value',
                    'orderby' => 'location_level1_value',
                    'order' => 'ASC',
                    'paged' => $paged
                    )
                 );
while ($my_query->have_posts){
    $my_query->the_post();
              //do your loop stuff
} 

并将此代码添加到您的functions.php

   //join filter
         add_filter('posts_join', 'listing_join_865' );
         function listing_join_865($join){
Global$ my_query;            
if ('listing' = $my_query->query['post_type']){
                $restriction1 = 'gateway_value';
                return $join .="
                LEFT JOIN $wpdb->postmeta AS $restriction1 ON(
                $wpdb->posts.ID = $restriction1.post_id
                AND $restriction1.meta_key = '$restriction1'
                )";
             }else {
                return $join;
            }
         }
         //where filter
         add_filter('posts_where', 'listing_where_865' );
         function listing_where_865($where){
             global $my_query;
            if ('listing' = $my_query->query['post_type']){
                return $where.= " AND $restriction1.meta_value != 'yes'";
            }else{
                return $where;
            }
         }

现在这应该起作用。

Answer 3

很抱歉回答我自己的问题：

查看[http://core.trac.wordpress.org/ticket/15031] [1]，这似乎是一个已知的问题。我已经修复了（黑客？）它可以使用 post_filter, ，像这样（仅适用于任何可能正在寻找相同答案的人的参考）：

在functions.php ###

add_filter('posts_orderby', 'EV_locationl1' );
function EV_locationl1 ($orderby) {
    global $EV_locationl1_orderby;
    if ($EV_locationl1_orderby) $orderby = $EV_locationl1_orderby;
    return $orderby;
}

修改了模板文件中的wp_query ###

$EV_locationl1_orderby = " mt1.meta_value ASC";

$wp_query = new WP_Query( array (
    'post_type' => 'listing',
    'posts_per_page' => '9',
    'post_status' => 'publish',
    'meta_query' => array(
            array(
                    'key' => 'gateway_value',
                    'value' => 'Yes',
                    'compare' => '!='
                    ),
            array(
                    'key' => 'location_level1_value'
            )
        ),
    'order' => $EV_locationl1_orderby,
    'paged' => $paged
    ));