Reply To: Archive with ajax custom field filter : Error 500

• 24prod

• May 3, 2019 at 10:36 pm

Well, if it can help somebody, this is my working code :

// array of filters (field key => field name)
$GLOBALS['my_query_filters'] = array(
	'field_5cb6ef1f75209'  => 'alcool',
	'field_5cb74afb68539'  => 'caracteristiques',
);

// action
add_action('pre_get_posts', 'my_pre_get_posts', 10, 1);

function my_pre_get_posts( $query ) {

	// bail early if is in admin
	if( is_admin() ) return;

	// bail early if not main query
	// - allows custom code / plugins to continue working
	//if( !$query->is_main_query() ) return;

	// get meta query
	$meta_query = $query->get('meta_query');

	// loop over filters
	$meta_query = array(
		'relation' => 'AND',
	);
	$i = 0;
	foreach( $GLOBALS['my_query_filters'] as $key => $name ) {

		// continue if not found in url
		if( empty($_GET[ $name ]) ) {
			continue;
		}

		$i++;

		$meta_query[$i] = array(
			'relation' => 'OR',
		);

		// get the value for this filter
		$values = explode( ",", $_GET[ $name ] );

		foreach( $values as $value ) {
			$meta_query[$i][] = array(
				'key'      => $name,
				'value'    => $value,
				'compare'  => 'LIKE',
			);

		}
	}
	// update meta query
	$query->set('meta_query', $meta_query);
	return;

}

Just a question, is there a way to “ajaxify” this ? With no page reload ?