FIX: a User is *not* a Topic

app/controllers/topics_controller.rb

@@ -576,9 +576,7 @@ class TopicsController < ApplicationController
 
     Scheduler::Defer.later "Track Visit" do
       TopicViewItem.add(topic_id, ip, user_id)
-      if track_visit
-        TopicUser.track_visit! topic_id, user_id
-      end
+      TopicUser.track_visit!(topic_id, user_id) if track_visit
     end
 
   end

app/models/topic_user.rb

@@ -125,16 +125,14 @@ class TopicUser < ActiveRecord::Base
       # In case of a race condition to insert, do nothing
     end
 
-    def track_visit!(topic,user)
-      topic_id = topic.is_a?(Topic) ? topic.id : topic
-      user_id = user.is_a?(User) ? user.id : topic
-
+    def track_visit!(topic_id, user_id)
       now = DateTime.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)
       else
-        observe_after_save_callbacks_for topic_id, user_id
+        observe_after_save_callbacks_for(topic_id, user_id)
       end
     end
 

spec/models/topic_user_spec.rb

@@ -125,7 +125,7 @@ describe TopicUser do
   describe 'visited at' do
 
     before do
-      TopicUser.track_visit!(topic, user)
+      TopicUser.track_visit!(topic.id, user.id)
     end
 
     it 'set upon initial visit' do
@@ -139,7 +139,7 @@ describe TopicUser do
       today = yesterday.tomorrow
 
       freeze_time today do
-        TopicUser.track_visit!(topic,user)
+        TopicUser.track_visit!(topic.id, user.id)
         # reload is a no go
         topic_user = TopicUser.get(topic,user)
         expect(topic_user.first_visited_at.to_i).to eq(yesterday.to_i)
@@ -149,7 +149,7 @@ describe TopicUser do
 
     it 'triggers the observer callbacks when updating' do
       UserActionObserver.instance.expects(:after_save).twice
-      2.times { TopicUser.track_visit!(topic, user) }
+      2.times { TopicUser.track_visit!(topic.id, user.id) }
     end
   end