title: Doctrine 2 - One-To-Many with multiple Entities
body: <p>I have a few Entities that I would like to be able to map Comments to (Profiles, Posts, Images, Videos - things like that). </p>
  
  <p>Each of these Entities has a column that contains a guid, and what I would like to do is have the Comment table hold the guid to the item to which it belongs. What I can't figure out is how to configure Doctrine to handle this kind of thing so that the joins work. The solution I think might work is to use NativeSql (although I am not sure that will work either), but would rather not have to do that if at all possible. </p>
  
  <p>I don't imagine I am the first one to encounter this problem, so I hope someone out there can help!</p>
  
  <p>Thanks.</p>