defer view creation on so updates are not performed when people navigate to topics

app/controllers/topics_controller.rb

@@ -47,8 +47,12 @@ class TopicsController < ApplicationController
       # (see http://meta.discourse.org/t/noscript-tag-and-some-search-engines/8078)
       return render 'topics/plain', layout: false if (SiteSetting.enable_escaped_fragments && params.has_key?('_escaped_fragment_'))
 
-      View.create_for(@topic_view.topic, request.remote_ip, current_user)
       track_visit_to_topic
+
+      if should_track_visit_to_topic?
+        @topic_view.draft = Draft.get(current_user, @topic_view.draft_key, @topic_view.draft_sequence)
+      end
+
       perform_show_response
     end
 
@@ -301,9 +305,13 @@ class TopicsController < ApplicationController
   end
 
   def track_visit_to_topic
-    return unless should_track_visit_to_topic?
-    TopicUser.track_visit! @topic_view.topic, current_user
-    @topic_view.draft = Draft.get(current_user, @topic_view.draft_key, @topic_view.draft_sequence)
+    Jobs.enqueue(:view_tracker,
+                    topic_id: @topic_view.topic.id,
+                    ip: request.remote_ip,
+                    user_id: (current_user.id if current_user),
+                    track_visit: should_track_visit_to_topic?
+                )
+
   end
 
   def should_track_visit_to_topic?

app/jobs/regular/view_tracker.rb

@@ -0,0 +1,17 @@
+module Jobs
+
+  # Asynchronously send an email to a user
+  class ViewTracker < Jobs::Base
+    def execute(args)
+      topic_id = args[:topic_id]
+      user_id = args[:user_id]
+      ip = args[:ip]
+      track_visit = args[:track_visit]
+
+      View.create_for_parent(Topic, topic_id, ip, user_id)
+      if track_visit
+        TopicUser.track_visit! topic_id, user_id
+      end
+    end
+  end
+end

app/models/topic_user.rb

@@ -108,12 +108,15 @@ class TopicUser < ActiveRecord::Base
     end
 
     def track_visit!(topic,user)
+      topic_id = Topic === topic ? topic.id : topic
+      user_id = User === user ? user.id : topic
+
       now = DateTime.now
-      rows = TopicUser.where({topic_id: topic.id, user_id: user.id}).update_all({last_visited_at: now})
+      rows = TopicUser.where({topic_id: topic_id, user_id: user_id}).update_all({last_visited_at: now})
       if rows == 0
-        TopicUser.create(topic_id: topic.id, user_id: user.id, last_visited_at: now, first_visited_at: now)
+        TopicUser.create(topic_id: topic_id, user_id: user_id, last_visited_at: now, first_visited_at: now)
       else
-        observe_after_save_callbacks_for topic.id, user.id
+        observe_after_save_callbacks_for topic_id, user_id
       end
     end
 

app/models/view.rb

@@ -5,13 +5,11 @@ class View < ActiveRecord::Base
   belongs_to :user
   validates_presence_of :parent_type, :parent_id, :ip_address, :viewed_at
 
-  # TODO: This could happen asyncronously
-  def self.create_for(parent, ip, user=nil)
-
+  def self.create_for_parent(parent_class, parent_id, ip, user_id)
     # Only store a view once per day per thing per user per ip
-    redis_key = "view:#{parent.class.name}:#{parent.id}:#{Date.today.to_s}"
-    if user.present?
-      redis_key << ":user-#{user.id}"
+    redis_key = "view:#{parent_class.name}:#{parent_id}:#{Date.today.to_s}"
+    if user_id
+      redis_key << ":user-#{user_id}"
     else
       redis_key << ":ip-#{ip}"
     end
@@ -20,15 +18,20 @@ class View < ActiveRecord::Base
       $redis.expire(redis_key, 1.day.to_i)
 
       View.transaction do
-        View.create(parent: parent, ip_address: ip, viewed_at: Date.today, user: user)
+        View.create!(parent_id: parent_id, parent_type: parent_class.to_s, ip_address: ip, viewed_at: Date.today, user_id: user_id)
 
         # Update the views count in the parent, if it exists.
-        if parent.respond_to?(:views)
-          parent.class.where(id: parent.id).update_all 'views = views + 1'
+        if parent_class.columns_hash["views"]
+          parent_class.where(id: parent_id).update_all 'views = views + 1'
         end
       end
     end
   end
+
+  def self.create_for(parent, ip, user=nil)
+    user_id = user.id if user
+    create_for_parent(parent.class, parent.id, ip, user_id)
+  end
 end
 
 # == Schema Information

lib/guardian.rb

@@ -427,7 +427,7 @@ class Guardian
   def is_my_own?(obj)
 
     unless anonymous?
-      return obj.user_id == @user.id if obj.respond_to?(:user_id)
+      return obj.user_id == @user.id if obj.respond_to?(:user_id) && obj.user_id && @user.id
       return obj.user == @user if obj.respond_to?(:user)
     end
 

spec/controllers/topics_controller_spec.rb

@@ -2,8 +2,6 @@ require 'spec_helper'
 
 describe TopicsController do
 
-
-
   context 'wordpress' do
     let!(:user) { log_in(:moderator) }
     let(:p1) { Fabricate(:post, user: user) }
@@ -527,7 +525,7 @@ describe TopicsController do
 
     it 'tracks a visit for all html requests' do
       current_user = log_in(:coding_horror)
-      TopicUser.expects(:track_visit!).with(topic, current_user)
+      TopicUser.expects(:track_visit!).with(topic.id, current_user.id)
       get :show, topic_id: topic.id, slug: topic.slug
     end