Reply To: Insert Cat ID into Query

• Jonathan

• September 6, 2015 at 11:36 pm

Hi @skasprick

any ACF function beginning with “the_” echoes out the result. Replace it with “get_” and it will instead return the result.

That’s why you’re seeing the ID echoed on the page but not applied to your query.

So do this:

query_posts(array(
    'cat' => get_sub_field('part_category'), // get posts by category id
    'posts_per_page' => -1 // all posts
));
?>

and it should work better.

I do feel the need to inform you that using query_posts is a nono in the WP developer community since quite some time. If you’re looking to alter a core query you should take a look at the pre_get_posts filter: https://codex.wordpress.org/Plugin_API/Action_Reference/pre_get_posts

and If you’re looking to create a whole new set of posts you should look at wp_query: codex.wordpress.org/Class_Reference/WP_Query