Reply To: How can I send an additional field during ajax requests?

• Jonathan

• July 8, 2016 at 4:55 pm

Thanks this helped me get to my own solution 🙂

For anyone in need this is how I solved a scenario where the user first selects a post object (post object field) and then selects a term from a taxonomy field which should only show terms connected to the previously chosen post.

This works on 5.3.n and the JS is a bit different now so I think you might need to change the JS even for the solution above.

*php*

/**
 * Filters the idrott taxonomy dropdown by selected club.
 *
 * @since	1.0.0
 */
public function filter_idrott_dropdown_admin( $args, $field, $post_id ){

    $club = isset($_REQUEST['club_sport']) ? (int) $_REQUEST['club_sport'] : false;
    if ( !$club ){
	    return $args;
    }

	$sports = get_the_terms( $club, 'idrotter' );
	$sport_ids = array();
	if( $sports ){
		foreach( $sports as $sport ){
			$sport_ids[] = $sport->term_id;
		}
	}
	
	if( !empty( $sport_ids ) ){
		$args['include'] = $sport_ids;
	}
	
    return $args;

}

*Jquery/javascript*

/**
 * Update the ajax arguments for select2 objects to include the chosen club id
 * This is done by replacing the default ajax.data function with a wrapper, which calls the old function and then appends "club_sport" to the results.
 */
acf.add_filter(
    'select2_args',
    function( args ) {
        if ( typeof args.ajax.data == 'function' ) {
            var old_data_func = args.ajax.data; // We'll keep this for maximum compatibility, and extend it.

            args.ajax.data = function(term, page) {
                var default_response = old_data_func( term, page ); // Call the old, default function.
                default_response.club_sport = $('#acf-field_577e458143db1-input').val();
                // Return the default args with our club_sport value.
                return default_response;
            }
        }

        return args;
    }
);