基於wordpress中的自定義字段查詢帖子

Question

我試圖編寫一個查詢來查找並顯示與我的輸入具有相同自定義字段值的所有帖子。

在WordPress我有以下...

我查詢...

$pageposts = $wpdb->get_results("SELECT wposts.* FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_value = 'petrol' OR wpostmeta.meta_value = 'local' ORDER BY wpostmeta.meta_value DESC", OBJECT); 

如果我刪除「OR wpostmeta.meta_value = '本地' 這個工作正常並將自定義字段的值作爲「汽油」拉動正確的帖子。

有人可以給我一個關於我會出錯的想法嗎？目前，它的顯示我所有的帖子甚至那些草稿並已刪除，其還循環並展示他們無數次......

Answer 1

嘗試：

SELECT wposts.* 
FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta 
WHERE wposts.ID = wpostmeta.post_id 
AND (wpostmeta.meta_value = 'petrol' OR wpostmeta.meta_value = 'local') 
ORDER BY wpostmeta.meta_value DESC" 

Answer 2

想通了......

<?php 
$customkey = 'Network'; // set to your custom key 
$customvalue = 'Local'; // set to custom value 

global $wpdb; 
$my_posts = $wpdb->get_results("SELECT * FROM $wpdb->posts, $wpdb->postmeta WHERE ID = $wpdb->postmeta.post_id AND meta_key = '$customkey' AND meta_value = '$customvalue' ORDER BY post_date DESC"); 

foreach ($my_posts as $post) : 
setup_postdata($post); 

echo '<div><a href="'; 
the_permalink(); 
echo '"></div>'; 
the_title(); 

endforeach; 
?>