From 33df0ee8e45a70bf4a4bd79b800a7eb679ba9885 Mon Sep 17 00:00:00 2001
From: Emanuel Hayford <siawmensah@gmail.com>
Date: Thu, 16 Mar 2017 06:41:15 +0100
Subject: [PATCH] Fixes #1230. Makes comment counter more efficient

---
 0                                                 |  2 ++
 app/models/comment.rb                             |  2 +-
 app/views/admin/events/index.html.haml            |  2 +-
 .../20170316042351_add_comment_count_to_events.rb | 15 +++++++++++++++
 db/schema.rb                                      |  3 ++-
 5 files changed, 21 insertions(+), 3 deletions(-)
 create mode 100644 0
 create mode 100644 db/migrate/20170316042351_add_comment_count_to_events.rb

diff --git a/0 b/0
new file mode 100644
index 00000000..b8bb5159
--- /dev/null
+++ b/0
@@ -0,0 +1,2 @@
+      invoke  active_record
+      create    db/migrate/20170316042351_add_comment_count_to_events.rb
diff --git a/app/models/comment.rb b/app/models/comment.rb
index 31531f8e..8c915974 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -8,7 +8,7 @@ class Comment < ActiveRecord::Base
   # want user to vote on the quality of comments.
   #acts_as_votable
 
-  belongs_to :commentable, polymorphic: true
+  belongs_to :commentable, polymorphic: true, counter_cache: true
 
   # NOTE: Comments belong to a user
   belongs_to :user
diff --git a/app/views/admin/events/index.html.haml b/app/views/admin/events/index.html.haml
index 16110268..bd02e73e 100644
--- a/app/views/admin/events/index.html.haml
+++ b/app/views/admin/events/index.html.haml
@@ -183,4 +183,4 @@
                 %ul.dropdown-menu{role: 'menu'}
                   = render 'change_state_dropdown', event: event
             %td.text-center
-              = link_to "#{event.comment_threads.count}", admin_conference_program_event_path(@conference.short_title, event), anchor: 'comments-div'
+              = link_to "#{event.comments_count}", admin_conference_program_event_path(@conference.short_title, event), anchor: 'comments-div'
diff --git a/db/migrate/20170316042351_add_comment_count_to_events.rb b/db/migrate/20170316042351_add_comment_count_to_events.rb
new file mode 100644
index 00000000..762fa882
--- /dev/null
+++ b/db/migrate/20170316042351_add_comment_count_to_events.rb
@@ -0,0 +1,15 @@
+class AddCommentCountToEvents < ActiveRecord::Migration
+  def up
+    add_column :events, :comments_count, :integer, default: 0
+
+    Event.reset_column_information
+
+    Event.find_each do |event|
+      event.update_attribute :comments_count, event.comment_threads.length
+    end
+  end
+
+  def down
+    remove_column :events, :comments_count
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 34c30a04..458d218a 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170213145807) do
+ActiveRecord::Schema.define(version: 20170316042351) do
 
   create_table "ahoy_events", force: :cascade do |t|
     t.uuid     "visit_id",   limit: 16
@@ -234,6 +234,7 @@ ActiveRecord::Schema.define(version: 20170213145807) do
     t.boolean  "is_highlight",                 default: false
     t.integer  "program_id"
     t.integer  "max_attendees"
+    t.integer  "comments_count",               default: 0
   end
 
   create_table "events_registrations", force: :cascade do |t|