Wp Rest Api Custom End point

Question

Im trying to add a custom end point to my wp-rest api the latest version. I have this already but the one with the slug param at the end does not work.. Does any one know why.. would be great if anyone could help..

     register_rest_route( 'wp/v2', '/guestmix', array(
        array(
            'methods'         => WP_REST_Server::READABLE,
            'callback'        => array( $this, 'get_guestmixes' )
        ),
        'schema' => array( $this, 'get_public_item_schema' )
    ) );

    register_rest_route( 'wp/v2', '/guestmix/(?P<slug>\d+)', array(
        'methods' => 'GET',
        'callback' => 'get_guestmix'
    ) );

Answer 1

i guess it because you used d metacharacter for regex (?P<slug>\d+) that's mean for digit, please try use S instead. The code should look like this

register_rest_route( 'wp/v2', '/guestmix/(?P<slug>\S+)', array(
    'methods' => 'GET',
    'callback' => 'get_guestmix'
) );

this is cheat sheet for reference http://www.phpliveregex.com/

Answer 2

The above answer works for me, though I implemented the regular expression slightly differently, following a 2019 gist, that covers different url/slug-structure scenarios.

register_rest_route( 'wp/v2', '/guestmix/(?P<slug>[a-zA-Z0-9-]+)', array(
    'methods' => 'GET',
    'callback' => 'get_guestmix'
) );

Hope this helps