uses cache counter for debate's comments

app/models/comment.rb

@@ -9,7 +9,7 @@ class Comment < ActiveRecord::Base
   validates :body, presence: true
   validates :user, presence: true
 
-  belongs_to :commentable, polymorphic: true
+  belongs_to :commentable, polymorphic: true, counter_cache: true
   belongs_to :user, -> { with_hidden }
 
   has_many :inappropiate_flags, :as => :flaggable
@@ -88,4 +88,8 @@ class Comment < ActiveRecord::Base
     children.count
   end
 
+  def after_hide
+    commentable_type.constantize.reset_counters(commentable_id, :comment_threads)
+  end
+
 end

app/views/debates/_debate.html.erb

@@ -9,7 +9,7 @@
           <h3><%= link_to debate.title, debate %></h3>
           <p class="debate-info">
             <i class="icon-comments"></i>&nbsp;
-            <%= link_to t("debates.debate.comments", count: debate.comment_threads.count), debate_path(debate, anchor: "comments") %>
+            <%= link_to t("debates.debate.comments", count: debate.comments_count), debate_path(debate, anchor: "comments") %>
           </p>
           <div class="debate-description">
             <%= link_to debate.description, debate %>

app/views/debates/show.html.erb

@@ -40,7 +40,7 @@
         <%= l @debate.created_at.to_date %>
         <span class="bullet">&nbsp;&bullet;&nbsp;</span>
         <i class="icon-comments"></i>&nbsp;
-        <%= link_to t("debates.show.comments", count: @debate.comment_threads.count), "#comments" %>
+        <%= link_to t("debates.show.comments", count: @debate.comments_count), "#comments" %>
         <span class="bullet">&nbsp;&bullet;&nbsp;</span>
         <span class="js-flag-as-inappropiate-actions">
           <%= render 'debates/flag_as_inappropiate_actions', debate: @debate %>
@@ -79,7 +79,7 @@
 
       <h2>
         <%= t("debates.show.comments_title") %>
-        <span>(<%= @debate.comment_threads.count %>)</span>
+        <span>(<%= @debate.comments_count %>)</span>
       </h2>
       <% if user_signed_in? %>
           <%= render 'comments/form', {parent: @debate, toggeable: false} %>

app/views/welcome/_featured_debate.html.erb

@@ -8,7 +8,7 @@
         <h3><%= link_to featured_debate.title, featured_debate %></h3>
         <p class="debate-info">
           <i class="icon-comments"></i>&nbsp;
-          <%= link_to t("debates.show.comments", count: featured_debate.comment_threads.count), debate_path(featured_debate, anchor: "comments") %>
+          <%= link_to t("debates.show.comments", count: featured_debate.comments_count), debate_path(featured_debate, anchor: "comments") %>
         </p>
         <div class="debate-description">
           <%= link_to featured_debate.description, featured_debate %>

spec/models/comment_spec.rb

@@ -8,6 +8,15 @@ describe Comment do
     expect(comment).to be_valid
   end
 
+  it "should update cache_counter in debate after hide" do
+    debate  = create(:debate)
+    comment = create(:comment, commentable: debate)
+
+    expect(debate.reload.comments_count).to eq(1)
+    comment.hide
+    expect(debate.reload.comments_count).to eq(0)
+  end
+
   describe "#children_count" do
     let(:comment) { create(:comment) }
     let(:debate)  { comment.debate }