StackOverflowError with unbind

[greenlaw110]

If you have controller method signature use ObjectId as parameter type, then you will probably end up with a StackOverflowError with unbind method. This is a limitation of Play framework. See http://groups.google.com/group/play-framework/browse_thread/thread/8fa3cbd25b635ed3/542eee6d20a73d53?lnk=gst&q=unbind+stackOverflowError#542eee6d20a73d53.

Workaround is to use String in place where you want to use ObjectId, like the following:

public static void form(String id) {
    if(id != null) {
        Post post = Post.findById(new ObjectId(id));
        render(post);
    }
    render();
}