Ok.  If `load_article` and `load_comment` are common to other controllers, you can move them out and you'd just have

```ruby
def load_votable
  @votable = params[:article_id].present? ? load_article : load_comment
end
```

if not, my first suggestion should have looked like:

```ruby
def load_votable
  @voatable = load_article || load_comment
end

def load_article
  Article.find_by_id(params[:article_id])  #=> returns nil if params[:article_id] is nil
end

def load_comment
  Comment.find_by_id(params[:comment_id])
end
```