id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
16949,Custom post types: error on page if query contains multiple post types,mastermind,,"I'm using custom post types, and I modified the $query to include multiple post types. This works quite well, until I enter a URL to a non-existant post (modifying the last part, i.e. the post's slug).

{{{

// some HOWTO linked from the Codex suggests this,
// can't find the link right now

function add_posttypes_to_query($query)
{
	if (!is_admin() && !$query->query_vars['suppress_filters'])
	{
		if (!is_home())
			$post_type = array('video', 'post');

		$query->set('post_type', $post_type);
	}

	return $query;
}

add_filter('pre_get_posts', 'add_posttypes_to_query');
}}}

The error I get is: “Warning: Illegal offset type in isset or empty in /home/lxg/www/shops.supreme.de/supremeshops/branches/private_wp3/wp-includes/post.php on line 811”.

It appears that the function {{{get_post_type_object}}} gets the array passed if no posts were found.

Also, I realized that custom post single pages don't issue a HTTP 404 status on errors. But this may be due to local modifications. I am currently not able to set up an environment where I isolate this problem.",defect (bug),new,normal,Future Release,General,3.1,normal,,has-patch 2nd-opinion,