Add new spec classes.

spec/models/update_comment.rb

@@ -0,0 +1,11 @@
+class UpdateComment
+  include Mongoid::Document
+  include Mongoid::MagicCounterCache
+
+  belongs_to :post
+
+  field :remark
+  field :is_published, type: Boolean, default: false
+
+  counter_cache :post, :if => Proc.new { |act| (act.is_published)  }, :if_update => Proc.new { |act| act.changes['is_published'] }
+end

spec/models/update_review.rb

@@ -0,0 +1,10 @@
+class UpdateReview
+  include Mongoid::Document
+  include Mongoid::MagicCounterCache
+
+  embedded_in   :article
+  counter_cache :article, :if => Proc.new { |act| (act.is_published)  }, :if_update => Proc.new { |act| act.changes['is_published'] }
+
+  field :comment
+  field :is_published, type: Boolean, default: false
+end