Reply To: pre_get_posts – organising CPT posts with Datepicker field

• Keith Lock

• September 24, 2017 at 6:02 am

It’s may be just a matter of specifying the post type in the Query.

It sounds like you know this, but remember… the below code naturally has values that need to be replaced:

a) ‘my_custom_post_type’ = the ‘slug’ of your post type (3 places… plus the function name twice if desired)
b) ‘date’ = the ‘name’ of your ACF Date field (1 place)

<?php
function mycustomposttype_pre_get_posts() {
  if ( is_admin() ) { return $query; }
  if ( is_post_type_archive( 'my_custom_post_type' )  && !empty( $query->query['post_type']  == 'my_custom_post_type' ) {
    $query->set( 'post_type', 'my_custom_post_type' );
    $query->set( 'meta_key', 'date' );
    $query->set( 'orderby', 'meta_value_num' );
    $query->set( 'order', 'DESC' );
  }
  return $query;
}
add_action('pre_get_posts','mycustomposttype_pre_get_posts');
?>

You may need to adjust ‘orderby’. I got ‘num’ from the ACF docs about querying date fields.