Using post type as custom field for filter post types

• mehdiagharlou

• January 16, 2017 at 11:19 pm

I’m trying to filter post types by another post type selected as custom field.

courses:
power
water

classes:
class1:
title : class1
parent_course : power

my code in single-course.php:

$id = get_the_id();
$classes = get_posts(array(
‘numberposts’ => -1,
‘post_type’ => ‘class’,
‘meta_key’ => ‘parent_course’,
‘meta_value_num’ => $id
));

but no data retrieved or all classes without any filtering retrieved.\

any idea?

thanks

• John Huebner

• February 6, 2017 at 6:25 am

It depends on what type of field parent_course is. The query you need to use will depend on what type of field it is and the way that field stores data in the DB https://www.advancedcustomfields.com/resources/query-posts-custom-fields/