Update a card's created_at when it is published

ref: https://app.fizzy.do/5986089/cards/2854

app/models/card/statuses.rb

@@ -4,6 +4,7 @@ module Card::Statuses
   included do
     enum :status, %w[ drafted published ].index_by(&:itself)
 
+    before_save :update_created_at_on_publication
     after_create -> { track_event :published }, if: :published?
 
     scope :published_or_drafted_by, ->(user) { where(status: :published).or(where(status: :drafted, creator: user)) }
@@ -15,4 +16,11 @@ module Card::Statuses
       track_event :published
     end
   end
+
+  private
+    def update_created_at_on_publication
+      if will_save_change_to_status? && status_in_database.inquiry.drafted?
+        self.created_at = Time.now
+      end
+    end
 end

test/models/card/statuses_test.rb

@@ -51,4 +51,20 @@ class Card::StatusesTest < ActiveSupport::TestCase
     assert_equal card, event.eventable
     assert_equal "card_published", event.action
   end
+
+  test "created_at is updated when the card is published" do
+    Current.session = sessions(:david)
+    freeze_time
+
+    card = travel_to 1.week.ago do
+      boards(:writebook).cards.create! creator: users(:kevin), title: "Newly created card"
+    end
+
+    assert card.drafted?
+    assert_equal 1.week.ago, card.created_at
+
+    card.publish
+
+    assert_equal Time.now, card.created_at
+  end
 end