wordpress 查询答案

【问题标题】：wordpress querywordpress 查询
【发布时间】：2010-03-19 12:06:29
【问题描述】：

如何使用超过 1 个自定义键/值对查询某个类别的帖子？

【问题讨论】：

【解决方案1】：

$query =  "SELECT * FROM dishes " ;

$return  = $db->query( $query ) ;

【讨论】：

【解决方案2】：

您可以多次包含 postmeta。

$querystr = "
    SELECT wposts.* 
    FROM $wpdb->posts wposts, 
         $wpdb->postmeta wpostmeta1, 
         $wpdb->postmeta wpostmeta2
    WHERE wposts.ID = wpostmeta1.post_id 
    AND wposts.ID = wpostmeta2.post_id 
    AND wpostmeta1.meta_key = 'tag' 
    AND wpostmeta1.meta_value = 'email' 
    AND wpostmeta2.meta_key = 'anothertag' 
    AND wpostmeta2.meta_value = 'anothervalue' 
    AND wposts.post_status = 'publish' 
    AND wposts.post_type = 'post' 
    ORDER BY wposts.post_date DESC
 ";

 $pageposts = $wpdb->get_results($querystr, OBJECT);

【讨论】：

啊哈！那么这个查询如何与类别 ID 选择一起工作？

【解决方案3】：

有很多关于this here的信息

例如...

$querystr = "
    SELECT wposts.* 
    FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta
    WHERE wposts.ID = wpostmeta.post_id 
    AND wpostmeta.meta_key = 'tag' 
    AND wpostmeta.meta_value = 'email' 
    AND wposts.post_status = 'publish' 
    AND wposts.post_type = 'post' 
    ORDER BY wposts.post_date DESC
 ";

 $pageposts = $wpdb->get_results($querystr, OBJECT);

【讨论】：