pre_get_posts query to sort after date_picker

• MikaKastner

• May 8, 2024 at 12:34 pm

Hi, i would like to sort all posts according to the date of my start_time meta field. But no matter what i try i always get Nothing Found. Also had no luck when i try get_posts or a WP_Query.

What am i doing wrong?

Here’s the code:

function mind_pre_get_posts( $query ) {
  
  if( is_admin() ) {
    return $query; 
  }
  if( $query->is_main_query() ) {
    
    $query->set('orderby', 'meta_value'); 
    $query->set('meta_key', 'start_time');   
    $query->set('order', 'DESC'); 
    
  }
  return $query;
}
add_action('pre_get_posts', 'mind_pre_get_posts');

And here’s the custom field group:

	acf_add_local_field_group(array(
		'key' => 'group_1',
		'title' => 'Meta info',
		'fields' => array (
           		 array (
				'key' => 'start_time',
				'label' => 'Exhibition start',
				'name' => 'exhibition_start',
				'type' => 'date_picker',
			),
          		  array (
				'key' => 'end_time',
				'label' => 'Exhibition end',
				'name' => 'exhibition_end',
				'type' => 'date_picker',
			)
		),
		'location' => array (
			array (
				array (
					'param' => 'post_type',
					'operator' => '==',
					'value' => 'post',
				),
			),
		),
	));