I see. I thought there will be a scope defined in the comment Model such as

```coffee
scope: ->
  if self.blog_post_id
    "/blog_posts/#{self.blog_post_id}"
  else if self.picture_id
    "/pictures/#{self.picture_id}"
```

So I'm afraid if user has the class level or instance level *scope* method defined, it might be wrong if we get the options.url based on Spine.Ajax.getURL. Your thoughts?