我正在尝试对中的一些帖子进行筛选WP_Query, 但我似乎没有得到正确的条件。基本上，我想做的是获取具有自定义字段的帖子event_data （按此字段排序）并在这些帖子中仅选择填写了其中一个其他字段的帖子event_doc1, event_doc2, event_doc3, main_doc.

代码如下所示。

$metaCondition = array(
            \'relation\' => \'OR\',
            array(
                \'key\' => \'main_doc\',
                \'value\' => 0,
                \'compare\' => \'!=\',
                \'type\' => \'NUMBER\'
            ),
            array(
                \'key\' => \'event_doc1\',
                \'value\' => 0,
                \'compare\' => \'!=\',
                \'type\' => \'NUMBER\'
            ),
            array(
                \'key\' => \'event_doc2\',
                \'value\' => 0,
                \'compare\' => \'!=\',
                \'type\' => \'NUMBER\'
            ),
            array(
                \'key\' => \'event_doc3\',
                \'value\' => 0,
                \'compare\' => \'!=\',
                \'type\' => \'NUMBER\'
            )
        );

        $query = array(
            \'numberposts\' => 4, 
            \'orderby\' => \'meta_value\',
            \'meta_key\' => \'event_data\', 
            \'order\' => \'ASC\', 
            \'meta_query\' => $metaCondition
        );