wordpress通过帖子类型的自定义字段查询帖子

Question

I am using Advanced Custom Fields.

I have this query that gets all the post that have a custom field value for "artist" equal to the current page ID.

query_posts('meta_key=artist&meta_value='.$postID.'&post_type=page&order_by=title&order=DESC');

This works great as long as the custom field only has a number in it. I want to make my custom field a "post" . This isn't a problem because ACF has that option. But since the meta_value in my query will now need to get a value from an array I'm not sure how to do it.

Answer 1

Since the Post Object field is used to generate the custom field, you don't need meta key/value for the query, you just need to check if the field exist.

So the query wold look something like this:

$all_pages = get_posts('post_type=page&order_by=title&order=DESC');
foreach($all_pages as $page) {
    if(get_field('artist', $page->ID)) { // here you check if field is populated
       // loop content
    }
}