Filters the query $args used by WP_Query to display posts in the Relationship field.


  • Added in version 4.1.2


apply_filters( 'acf/fields/relationship/query', $args, $field, $post_id );
  • $args (array) The query args. See WP_Query for available args.
  • $field (array) The field array containing all settings.
  • $post_id (int|string) The current post ID being edited.


This filter provides modifiers to target specific fields. The following filter names are available:

  • acf/fields/relationship/query Applies to all fields.
  • acf/fields/relationship/query/name={$name} Applies to all fields of a specific name.
  • acf/fields/relationship/query/key={$key} Applies to all fields of a specific key.


This example demonstrates how to modify some of the Relationship field query args.


add_filter('acf/fields/relationship/query', 'my_acf_fields_relationship_query', 10, 3);
function my_acf_fields_relationship_query( $args, $field, $post_id ) {

    // Show 40 posts per AJAX call.
    $args['posts_per_page'] = 40;

    // Restrict results to children of the current post only.
    $args['post_parent'] = $post_id;

    return $args;

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