Reply To: How to create meta_query with relationship field and comparator 'IN'?

• John Huebner

• April 13, 2022 at 12:58 pm

You cannot to an “IN” query on a relationship field.

see section 3 of this doc https://www.advancedcustomfields.com/resources/query-posts-custom-fields/

You need to do

$meta_query = array(
  'relation' => 'OR',
  array(
    'key' => 'field_name',
    'value' => '"'.$first_id.'"',
    'compare' => 'LIKE'
  ),
  array(
    'key' => 'field_name',
    'value' => '"'.$second_id.'"',
    'compare' => 'LIKE'
  ),
  // etc.. 
);