Archive page custom fields filter (probs with tax and Post Obj fields)

• celestial

• May 26, 2020 at 5:42 pm

Hello!

I have 2 custom post types – projects and designers. project item has custom fields (text, taxonomies and Post Object). Text field contain area of flat/apartment, taxonomies: first, it’s type of project and, second one is status of project (prototype, finished, etc.). Post Oblect field – relationship Project and Designer (select a designer for project).

I’m making a filter for Projects Archive page. Like this – https://www.advancedcustomfields.com/resources/creating-wp-archive-custom-field-filter/

It’s working good for simple text custom field (for area), but not working for taxonomies and post object fields. How should I make this?

my urls for filtering on the archive page:
http://mydomain.com/projects/?area=25
http://mydomain.com/projects/?designer=new_studio
http://mydomain.com/projects/?type=bath

My functions.php

add_action('pre_get_posts', 'my_pre_get_posts');

function my_pre_get_posts( $query) {

    if( is_admin() ) {
        return;
    }

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

    if (isset($_GET['area']) ) {

        $meta_query[] = array(
            'key' => 'project_area', // custom text field - working good
            'value' => $_GET['area'],
            'type'      => 'NUMERIC',
            'compare' => '=',
        );
    }

       if (isset($_GET['designer']) ) {

        $meta_query[] = array(
            'key' => 'project_designer_obj', //custom field (Post obj) - not working. How should I use ['post_name'] of this Object for comparing with name of designer below?
            'value' => $_GET['designer'],
            'compare' => '=',
        );
    }

    if (isset($_GET['type']) ) {

        $meta_query[] = array(
            'key' => 'project_type',  //custom field (taxonomy) - not working. How should I use relationship taxs?
            'value' => $_GET['type'],
            'compare' => '=',
        );
    }

    $query->set('meta_query', $meta_query);

    return;

}

If I try this:

if( !empty($_GET['designer']) ){
    $designer = the_field('project_designer_obj');
    $designer_name = $designer->post_name; // Trying to get property of non-object
    $meta_query[] = array(
       'key'       => 'project_designer_obj',
        'value'     => $designer_name,
        'compare'   => '=',
    );
}

I see “Notice: Trying to get property of non-object …”

Please, help me figure it out.

• John Huebner

• May 27, 2020 at 12:16 am

Taxonomy fields store term IDs, not the name of the term. In addition to this they store arrays of values.

so something like this /projects/?designer=new_studio would need to look something like this /projects/?designer=22 (id value is just an example)

And then the query would need to look something like this

$meta_query[] = array(
  'key' => 'project_designer_obj',
  'value' => '"'.$_GET['designer'].'"', // quotes around id important
  'compare' => 'LIKE',
);

• celestial

• May 28, 2020 at 12:24 pm

Thank you, John!