Wordpress SQL選擇多個元值/元鍵/自定義字段

我想修改wordpress/MySQL函數來顯示更多信息。我目前正在運行下面的查詢選擇後，加入「postmeta」，並得到其中meta_key = _likedWordpress SQL選擇多個元值/元鍵/自定義字段

function most_liked_posts($numberOf, $before, $after, $show_count) { 
global $wpdb; 

    $request = "SELECT ID, post_title, meta_value FROM $wpdb->posts, $wpdb->postmeta"; 
    $request .= " WHERE $wpdb->posts.ID = $wpdb->postmeta.post_id"; 
    $request .= " AND post_status='publish' AND post_type='post' AND meta_key='_liked' "; 
    $request .= " ORDER BY $wpdb->postmeta.meta_value+0 DESC LIMIT $numberOf"; 
    $posts = $wpdb->get_results($request); 

    foreach ($posts as $post) { 
    $post_title = stripslashes($post->post_title); 
    $permalink = get_permalink($post->ID); 
    $post_count = $post->meta_value; 

    echo $before.'<a href="' . $permalink . '" title="' . $post_title.'" rel="nofollow">' . $post_title . '</a>'; 
    echo $show_count == '1' ? ' ('.$post_count.')' : ''; 
    echo $after; 
    } 
}

的重要組成部分，作爲信息：$post_count = $post->meta_value;

但現在我也想搶附加到每個崗位的值稱爲wbphoto

如何指定 $ POST_COUNT = _liked和 $照片= wbphoto

？

這裏是我的phpmyadmin alt text http://i44.tinypic.com/ioisuv.png

來源

2010-03-28 wesbos

的SQL看起來會很醜陋的屏幕蓋。

// Your Meta key names 
    $metas = array(
     '_liked', '_another1' 
    ); 

    foreach ($metas as $i=>$meta_key) { 
     $meta_fields[] = 'm' . $i . '.meta_value as ' . $meta_key; 
     $meta_joins[] = ' left join ' . $wpdb->postmeta . ' as m' . $i . ' on m' . $i . '.post_id=' . $wpdb->posts . '.ID and m' . $i . '.meta_key="' . $meta_key . '"'; 
    } 
    $request = "SELECT ID, post_title, " . join(',', $meta_fields) . " FROM $wpdb->posts "; 
    $request .= join(' ', $meta_joins); 
    $request .= " AND post_status='publish' AND post_type='post'"; 
    $request .= " LIMIT $numberOf";

它會更好地使另一個SQL來檢索自己。

來源

2010-03-28 07:51:31 Darkerstar

嗯感謝。我將如何去迴應這些價值觀？ – wesbos 2010-03-28 15:57:39

我想我已經明白了。這很好。 – wesbos 2010-03-28 17:07:57

不知道這是否可以幫到你，但是這裏有一個SQl查詢可以獲取posts和post_meta。

SELECT DISTINCT ID, p.post_title, p.post_status, p.post_date, m.meta_key, m.meta_value 
FROM wp_posts p, wp_postmeta m 
WHERE p.post_author = 2 
AND p.post_status = 'publish' 
AND p.post_date >= '2009-01-01' 
AND p.post_date <= '2010-05-28' 
AND p.ID = m.post_id

來源

2010-05-26 09:34:05

修改查詢，如下：

$request = "SELECT ID, post_title, meta_value FROM $wpdb->posts p, $wpdb->postmeta pm, $wpdb->postmeta pm1"; 
    $request .= " WHERE p.ID = pm.post_id"; 
    $request .= " AND p.post_status='publish' AND p.post_type='post' AND pm.meta_key='_liked' AND pm1.meta_key='wbphoto'; 
    $request .= " ORDER BY pm.meta_value+0 DESC LIMIT $numberOf";

來源

2012-06-26 19:04:08

Wordpress SQL選擇多個元值/元鍵/自定義字段

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