Custom Fields
Support Meta Box Group Clonable select_advanced with ajax

This topic contains 2 replies, has 2 voices, and was last updated by  fexy 1 year, 6 months ago.

  • Creator
  • #8536

    Hi, we need to be able to link a post to one or more other posts so we used to create a group of clonable fields with a type of “post” to do this. However, since we have a few thousand posts, the performance was really poor once a user had associated a few posts (sometimes they associate as many as 30+).

    No we are hoping to make the field a “select_advanced” field and performance ajax lookups instead to avoid these performance issues. We did this by creating a simple wp_ajax endpoint that returned the matching posts in json as select2 expects and that almost works. The select_advanced dropdown renders properly and the ajax search works returning results but clicking on a result does nothing.

    Shouldn’t this work?

    Following is our metabox group definition:

    $meta_boxes[] = array(
        'id' => "finite_scroll",
        'title' => __('Finite Scroll'),
        'post_types' => array('recipe'),
        'fields' => array(
                'id' => $prefix . 'related_recipe',
                'type' => 'group',
                'clone' => true,
                'sort_clone' =>true,
                'fields' => array(
                        'name' => __('Related Recipe:'),
                        'id' => $prefix . 'rel_recipe',
                        'type' => 'select_advanced',
                        'options' => array('' => ''),
                        'js_options' => array (
                            'ajax' => array(
                                'url' => '/wp-admin/admin-ajax.php?action=select_advanced_post_lookup&post_type=recipe',
                                'dataType' => 'json',
                                'type' => 'get',
                                'delay' => '250'
                            'minimumInputLength' => 3,
                            'allowClear' => true, 
                            'placeholder' => 'Select recipe'

    Here is the wp_ajax function that sends search results to select2:

    add_action('wp_ajax_select_advanced_post_lookup', 'select_advanced_post_lookup');
    function select_advanced_post_lookup() {
        global $wpdb;
        $post_types = "'".implode("','", explode(',', $_GET['post_type']))."'";
        $keyword = "%".$wpdb->esc_like($_GET['q'])."%"; 
        $sql = "SELECT ID, post_title".
            " FROM $wpdb->posts".
            " WHERE post_title LIKE '". $keyword . "'" .
            " AND post_type IN (". $post_types .")" .
            " AND post_status='publish' ".
            " ORDER BY post_title LIMIT 0,15;";
        $results = $wpdb->get_results($sql);
        $response = array(
            'results' => array()
        foreach ( $results as $result ) {
            $response['results'][] = array( 'id:' => $result->ID, 'text' => $result->post_title );
Viewing 2 replies - 1 through 2 (of 2 total)
  • Author
  • #8540

    Anh Tran


    The logic should work. There is just a small typo in your code. In the response, the param should be id instead of id:.

    However, loading selected posts to show after updating is the next problem. We need to update options parameter to make the field renders properly. So, I added 2 more functions to get the saved data and put them in the options:



    Nice catch on the id param! Two of us were looking at the code so I don’t know how we missed that typo. That is what was causing the issue where we couldn’t select an item from the drop-down.

    I figured we’d have to solve for the post being selected after an update so I appreciate the code sample to get that working too! We’ve made the changes and it appears to be working great.

    Thanks for your help!

Viewing 2 replies - 1 through 2 (of 2 total)

You must be logged in to reply to this topic.