added :as option

lib/mongoid_denormalize.rb

@@ -63,8 +63,10 @@ def denormalize_from
     def denormalize_to
       self.denormalize_definitions.each do |definition|
         next unless definition[:options][:to]
-        assigns = Hash[*definition[:fields].collect { |name| ["#{self.class.name.underscore}_#{name}", self.send(name)] }.flatten(1)]
-
+        as = definition[:options][:as]
+        prefix = as ? as : self.class.name.underscore
+
+        assigns = Hash[*definition[:fields].collect { |name| ["#{prefix}_#{name}", self.send(name)] }.flatten(1)]
 
         [definition[:options][:to]].flatten.each do |association|
           relation = []
@@ -86,7 +88,6 @@ def denormalize_to
 
             c.to_a.each do |a|
               assigns.each { |assign| a.send("#{assign[0]}=", assign[1]) }
-
               a.save
             end
           end

spec/app/models/comment.rb

@@ -6,11 +6,13 @@ class Comment
 
   belongs_to :post, :inverse_of => :comments
   belongs_to :user
+  belongs_to :moderator, :class_name => "User", :inverse_of => :moderated_comments
 
-  attr_accessible :body, :user
+  attr_accessible :body, :user, :moderator
 
   denormalize :location, :type => Array, :from => :user
   denormalize :name, :from => :user
   denormalize :email, :from => :user
   denormalize :created_at, :type => Time, :from => :post
+  denormalize :nickname, :from => :moderator
 end

spec/app/models/user.rb

@@ -4,10 +4,13 @@ class User
 
   field :name
   field :email
+  field :nickname
   field :location, :type => Array
-  
+
   has_one :post
   has_many :comments
+  has_many :moderated_comments, :class_name => "Comment", :inverse_of => :moderator
 
   denormalize :name, :email, :location, :to => [:post, :comments]
+  denormalize :nickname, :to => :moderated_comments, as: :moderator
 end

spec/mongoid_denormalize_spec.rb

@@ -5,10 +5,12 @@
     Mongoid.master.collections.select {|c| c.name !~ /system/ }.each(&:drop)
 
     @post = Post.create!(:title => "Blog post", :body => "Lorem ipsum...", :created_at => Time.parse("Jan 1 2010 12:00"))
-    @user = User.create!(:name => "John Doe", :email => "john@doe.com", :post => @post, :location => [1, 1])
+    @user = User.create!(:name => "John Doe", :email => "john@doe.com", :post => @post, :location => [1, 1], :nickname => "jdoe")
     @comment = @post.comments.create(:body => "This is the comment", :user => @user)
+    @moderated_comment = @post.comments.create(:body => "This is a moderated comment", :moderator => @user)
 
     @user.comments << @comment
+    @user.moderated_comments << @moderated_comment
     @other_user = User.create!(:name => "Bill")
   end
 
@@ -78,6 +80,14 @@
 
       @comment.post_created_at.should eql Time.parse("Jan 1 2011 12:00")
     end
+
+    it "should push to overriden field names" do
+      @user.nickname = "jonsey"
+      @user.save!
+
+      @moderated_comment.reload
+      @moderated_comment.moderator_nickname.should eql "jonsey"
+    end
   end
 
   context "rake task" do