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

• princeofabyss

• February 1, 2021 at 10:43 am

@hube2 thanks a ton for your reply. Truth is I solved this earlier today, slightly differently than your proposed solution, but still it’s solved. I’ll post the code that I used, and I’ll elaborate on it later.

add_filter('acf/fields/post_object/result/name=screening_cinema', 'add_parent_to_cinema_options', 10, 4);
function add_parent_to_cinema_options($text, $post, $field, $post_id)
{
    if ($post->post_parent) {
        $text .= ' | ' . __('Parent', 'acf') . ': ' . get_the_title($post->post_parent);
    }

    return $text;
}

add_action('acf/input/admin_footer', 'add_js_for_disabling_cinema_options');
function add_js_for_disabling_cinema_options() {
    ?>
    <script type = "text/javascript">
    (function($) {
        acf.add_filter('select2_ajax_results', function(json, params, instance) {
            if (instance.data.field.data.name === 'screening_cinema') {
                json.results.forEach(function(element) {
                    if (typeof element.description === "undefined") {
                        element.disabled = "true";
                    }
                });
            }

            return json;
        });
    })(jQuery);
    </script>
    <?php
}

First of all, I noticed in includes/fields/class-acf-field-post_object.php at lines ~259-275 the following piece of code:

		// vars
		$result = array(
			'id'	=> $id,
			'text'	=> $text
		);
		
		
		// look for parent
		$search = '| ' . __('Parent', 'acf') . ':';
		$pos = strpos($text, $search);
		
		if( $pos !== false ) {
			
			$result['description'] = substr($text, $pos+2);
			$result['text'] = substr($text, 0, $pos);
			
		}

According to this, it’s possible to add a description and a text param in the json object used in acf.add_filter(‘select2_ajax_results’, function(json, params, instance)

That’s why I used the filter add_filter(‘acf/fields/post_object/result/name=screening_cinema’) to first add the parent part in the text shown, and then in the JS function I searched for the existence of the description param to decide whether I’ll disable the option or not.

Different approach than yours, the same effect and maybe a bit faster, as I’m not creating that whole bunch of top-category IDs. Plus, I liked that for the selected option, I get this | Parent: <parent title> in the dropdown so that I know exactly what parent the selection belongs to.

PS: The website is localized to my language that’s why you see that ” | Γονέας:” term in place of the ” | Parent:”.

Anyway, thanks a million for your help! Regards.