• gavin310

• June 16, 2023 at 6:22 am

Just in case it can help someone, I was able to accomplish this perfectly for my situation using Elliot’s select2_ajax_data filter suggestion and it’s much simpler than the other methods it seems. I have two taxonomy dropdowns and needed the 2nd one to be filtered by the value of the 1st one. @oscarfanatic ‘s solution got me pointed in the right direction and some other code I found online helped clear the rest up.

Also want to tag @hube2 in case it can help with his awesome efforts of helping people out in the forums.

Here’s how it works:

add_action( 'acf/input/admin_footer', function() {
	?>
	<script>
		( function( $ ) {
			if ( typeof acf !== 'undefined' ) {
				acf.add_filter( 'select2_ajax_data', function( data, args, elem, field, instance ) {
					if ( 'field_648b0852a2448' === data.field_key ) {
						data.format_id = $( '#acf-field_648b0890a2462' ).val(); // format_id is a custom property being added to the data object. It can be named whatever you want.
					}
					return data;
				} );
			}
		} )( jQuery );
	</script>
	<?php
} );

add_filter( 'acf/fields/taxonomy/query/key=field_648b0852a2448', function( $args, $field, $post_id ) {
	$format_id = $_POST['format_id'] ?? false; // $_POST['format_id'] is the custom property you created in the javascript above
	if ( $format_id ) {
		$args['meta_key'] = 'format';
		$args['meta_value'] = $format_id;
	}
	return $args;
}, 10, 3 );