another big commit :D

app/models/comment.rb

@@ -1,10 +1,17 @@
 class Comment < ActiveRecord::Base
-  attr_accessible :text, :user, :blogpost, :post
-
-  validates_presence_of :text, :user, :blogpost
-  validates_length_of :text, :in => 4..1000
+  attr_accessible :content, :author, :blogpost, :post
 
+  validates_presence_of :content, :author, :blogpost
+  validates_length_of :content, in: 4..1000
 
   belongs_to :blogpost
-  belongs_to :user
+  belongs_to :user_author, class_name: "User", foreign_key: "user_author_id"
+
+  def author
+    @author ||= if self.user_author.present?
+      user_author
+    else
+      User.first
+    end
+  end
 end