FIX: Update `last_version_at` when publishing

lib/topic_publisher.rb

@@ -7,7 +7,8 @@ class TopicPublisher
   end
 
   def publish!
-    TopicTimestampChanger.new(timestamp: Time.zone.now, topic: @topic).change! do
+    published_at = Time.zone.now
+    TopicTimestampChanger.new(timestamp: published_at, topic: @topic).change! do
       if @topic.private_message?
         @topic = TopicConverter.new(@topic, @published_by)
           .convert_to_public_topic(@category_id)
@@ -29,8 +30,11 @@ class TopicPublisher
       op = @topic.first_post
       if op.present?
         op.revisions.delete_all
-        op.update_column(:version, 1)
-        op.update_column(:public_version, 1)
+        op.update_columns(
+          version: 1,
+          public_version: 1,
+          last_version_at: published_at
+        )
       end
     end
 

spec/components/topic_publisher_spec.rb

@@ -24,11 +24,15 @@ describe TopicPublisher do
       end
 
       it "will publish the topic properly" do
+        published_at = 1.hour.from_now.change(usec: 0)
+        freeze_time(published_at) do
           TopicPublisher.new(topic, moderator, shared_draft.category_id).publish!
 
           topic.reload
           expect(topic.category).to eq(category)
           expect(topic).to be_visible
+          expect(topic.created_at).to eq(published_at)
+          expect(topic.updated_at).to eq(published_at)
           expect(topic.shared_draft).to be_blank
           expect(UserHistory.where(
             acting_user_id: moderator.id,
@@ -40,6 +44,10 @@ describe TopicPublisher do
           expect(op.revisions.size).to eq(0)
           expect(op.version).to eq(1)
           expect(op.public_version).to eq(1)
+          expect(op.created_at).to eq(published_at)
+          expect(op.updated_at).to eq(published_at)
+          expect(op.last_version_at).to eq(published_at)
+        end
       end
     end