Setting query in pre_get_posts and custom post types unassigned to any category

[novakpeter]

In functions.php:

function my_query_post_type($query) {
    global $wp_query;
    if ( is_category() && false == $query->query_vars['suppress_filters'] ){
        $query->set( 'post_type', array( 'post', 'my_post_type' ) );
    }
    return $query;
}
add_filter('pre_get_posts', 'my_query_post_type');

If posts within "my_post_type" custom post type are assigned to a category within custom taxonomy, this code works. If they are not assigned to any category, this code doesn't work for them - but probably should.

Since you're using is_category(), this code is depedant on the global $wp_query instance. Are you sure you didn't mean to use $query->is_category()?

Also, what exactly do you mean by "this code doesn't work for them"?

See #19985 and #20032. Also, this doesn't seem like a bug to me - you are on a taxonomy term archive page. The term is set in the query, so you are going to only get posts of any given post type with that term, which is exactly what I would expect.

OK, helenyhou is probably right, posts are within that (actually) pre-set term, I see.