Profile: Doug

Problem:

I am trying to retrieve the post ID of a related post connected through a specific Toolset Post Reference Field in PHP, but using get_post_meta() returns an empty string, and I need to avoid fetching all related posts of the same type.

Solution:

Use toolset_get_related_post( $post_id, 'relationship-slug' ) to retrieve the post ID tied specifically to the Post Reference Field; it returns the related post ID or 0 if none is found.

Example:

$related_post_id = toolset_get_related_post( 123, 'advisor' );
if ( $related_post_id ) {
    echo 'Related post ID: ' . $related_post_id;
} else {
    echo 'No related post found.';
}

Relevant Documentation:

https://toolset.com/documentation/programmer-reference/views-filters/

Problem:

I'm using a view with AJAX sorting and filtering, along with the "Show only filter options that would produce results" feature. It works perfectly in Safari but not in Chrome, where it endlessly loads. Disabling AJAX and the filter option resolves the issue in Chrome.

Solution:

The issue is related to a CORS error that occurs when accessing the site without the "www" prefix in the URL. The AJAX request is blocked because it is treated as a cross-origin request. To resolve this, you need to configure your server to include the Access-Control-Allow-Origin header for the admin-ajax.php file. This can be done by modifying your server's configuration:

1. For Apache:
Add the following to your .htaccess file:

<ifmodule mod_headers.c>
    Header set Access-Control-Allow-Origin "https://mlpt.com"
    Header set Access-Control-Allow-Methods "GET, POST, OPTIONS"
    Header set Access-Control-Allow-Headers "Content-Type"
</ifmodule>

2. For Nginx:
Add the following to your server block configuration:

location /wp-admin/admin-ajax.php {
    add_header 'Access-Control-Allow-Origin' 'https://mlpt.com';
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
    add_header 'Access-Control-Allow-Headers' 'Content-Type';
}

3. In WordPress (PHP):
Alternatively, add this to your theme’s functions.php or a custom plugin:

function add_cors_http_header() {
    header("Access-Control-Allow-Origin: https://mlpt.com");
    header("Access-Control-Allow-Methods: GET, POST, OPTIONS");
    header("Access-Control-Allow-Headers: Content-Type");
}
add_action('init', 'add_cors_http_header');