1 files changed, 8 insertions, 0 deletions
diff --git a/app/models/issue.rb b/app/models/issue.rb
index 1427fdc31a4..02f87728cc1 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -55,6 +55,14 @@ class Issue < ActiveRecord::Base
     state :opened
     state :reopened
     state :closed
+
+    after_transition any => :closed do |issue|
+      issue.update(closed_at: Time.zone.now)
+    end
+
+    after_transition closed: any do |issue|
+      issue.update(closed_at: nil)
+    end
   end
 
   def hook_attrs