orderby price meta_value 其中包含逗号 - wordpress

Question

我有 post 应该按价格自定义字段排序（从高到低）。使用以下选项正确排序它们：

选项 1

$args = array(
    'posts_per_page' => -1,
    'post_type' => 'my-post-type', 
    'post_status' => 'publish',
    'meta_key' => 'price_field',
    'orderby' => 'meta_value_num',
    'order' => 'DESC',
);
$list = get_posts($args);

选项 2

global $wpdb;
$queryStr = "SELECT * FROM wp_posts AS table1 LEFT JOIN (SELECT * FROM wp_postmeta WHERE 
meta_key = 'price_field') AS table2 ON table1.ID = table2.post_id WHERE 
table1.post_type = 'my-post-type' AND table1.post_status = 'publish' order by 
table2.meta_value+0 DESC";
$list = $wpdb->get_results($queryStr);

选项 3（与选项 2 相同，只是带有 REPLACE 函数）

$queryStr = "SELECT * FROM wp_posts AS table1 LEFT JOIN (SELECT * FROM wp_postmeta WHERE 
meta_key = 'price_field') AS table2 ON table1.ID = table2.post_id WHERE 
table1.post_type = 'my-post-type' AND table1.post_status = 'publish' order by 
REPLACE(table2.meta_value, ',', '') DESC";

帖子排序如下（顺序错误）：

600
25,000
22,000
15,000
10,000
7,000
6,000
2,000
0

排序很好，直到我添加 post 和 600 价格。只要它里面没有逗号，它就会出现在循环的最开始，这是不正确的。

有什么我遗漏的吗？

Answer 1

您可以在 order by 子句中使用（假）lpad 建立有效订单，例如：

$queryStr = "SELECT * 
             FROM wp_posts AS table1 
             LEFT JOIN (SELECT * 
             FROM wp_postmeta 
             WHERE meta_key = 'price_field') AS table2 ON table1.ID = table2.post_id 
             WHERE  table1.post_type = 'my-post-type' AND table1.post_status = 'publish' 
             order by  lpad(table2.meta_value, 12, '0') ASC";

参考：-

String Functions

或者根据你有 signbe 的事实，你可以尝试转换

$queryStr = "SELECT * 
             FROM wp_posts AS table1 
             LEFT JOIN (SELECT * 
                  FROM wp_postmeta 
                  WHERE meta_key = 'price_field') AS table2 ON table1.ID = table2.post_id 
             WHERE  table1.post_type = 'my-post-type' AND table1.post_status = 'publish' 
             order by  CONVERT(REPLACE(table2.meta_value, ',', ''),SIGNED INTEGER) ASC";