Makes comments increase the hot_score

app/models/comment.rb

@@ -24,6 +24,8 @@ class Comment < ActiveRecord::Base
 
   scope :for_render, -> { with_hidden.includes(user: :organization) }
 
+  after_create :call_after_commented
+
   def self.build(commentable, user, body, p_id=nil)
     new commentable: commentable,
         user_id:     user.id,
@@ -87,4 +89,8 @@ class Comment < ActiveRecord::Base
     !root?
   end
 
+  def call_after_commented
+    self.commentable.try(:after_commented)
+  end
+
 end

app/models/debate.rb

@@ -104,6 +104,10 @@ class Debate < ActiveRecord::Base
     update(ignored_flag_at: Time.now)
   end
 
+  def after_commented
+    save # updates teh hot_score because there is a before_save
+  end
+
   def calculate_hot_score
     z          = 1.96 # Normal distribution with a confidence of 0.95
     time_unit  = 1.0 * 12.hours

spec/models/debate_spec.rb

@@ -229,6 +229,12 @@ describe Debate do
         3.times { debate.register_vote(create(:user), false) }
         expect(previous).to be > debate.hot_score
       end
+
+      it "increases with comments" do
+        previous = debate.hot_score
+        Comment.create(user: create(:user), commentable: debate, body: 'foo')
+        expect(previous).to be < debate.hot_score
+      end
     end
 
   end