I've been using custom posts on my website, among them there are : "session" and "lecture".
The custom post "lecture" has many custom fields such "title", "duration"...
The custom post "session" has many custom fields too, one of them is "session_lecture" that points to a lecture : hence, a session is linked to a lecture. The lecture is chosen in a dropdown menu, generated with a nice tool : cmb2 metaboxes.
I handle the display of a session and a lecture with filters, like :
Those filters retrieve the custom fields and display them the way I want.
I'd like, for each lecture, to display a list of sessions that provide this lecture. So, within the filter above, I have written :
$args = array( 'post_type' => 'session', 'meta_key' => 'session_lecture', 'meta_value' => '$id', //$id is the id of the current lecture 'meta_compare' => '=', ); $query = new WP_Query( $args ); while ($query->have_posts()) : $query->the_post(); the_content(); endwhile;
But the query seems to return nothing. What's wrong with my query ? Should I use another mechanism ? Thanks