Use Ghost user when edited_by, merged_by deleted

3 files changed, 9 insertions, 1 deletions

diff --git a/app/models/concerns/editable.rb b/app/models/concerns/editable.rb
index c62c7e1e936..28623d257a6 100644
--- a/app/models/concerns/editable.rb
+++ b/app/models/concerns/editable.rb
@@ -4,4 +4,8 @@ module Editable
   def is_edited?
     last_edited_at.present? && last_edited_at != created_at
   end
+
+  def last_edited_by
+    super || User.ghost
+  end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index 8f40af24e20..c26be6d05a2 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -385,9 +385,11 @@ class User < ActiveRecord::Base
     # Return (create if necessary) the ghost user. The ghost user
     # owns records previously belonging to deleted users.
     def ghost
-      unique_internal(where(ghost: true), 'ghost', 'ghost%s@example.com') do |u|
+      email = 'ghost%s@example.com'
+      unique_internal(where(ghost: true), 'ghost', email) do |u|
         u.bio = 'This is a "Ghost User", created to hold all issues authored by users that have since been deleted. This user cannot be removed.'
         u.name = 'Ghost User'
+        u.notification_email = email
       end
     end
   end
diff --git a/app/services/users/migrate_to_ghost_user_service.rb b/app/services/users/migrate_to_ghost_user_service.rb
index 4628c4c6f6e..3a9c151cf9b 100644
--- a/app/services/users/migrate_to_ghost_user_service.rb
+++ b/app/services/users/migrate_to_ghost_user_service.rb
@@ -50,10 +50,12 @@ module Users
 
     def migrate_issues
       user.issues.update_all(author_id: ghost_user.id)
+      Issue.where(last_edited_by_id: user.id).update_all(last_edited_by_id: ghost_user.id)
     end
 
     def migrate_merge_requests
       user.merge_requests.update_all(author_id: ghost_user.id)
+      MergeRequest.where(merge_user_id: user.id).update_all(merge_user_id: ghost_user.id)
     end
 
     def migrate_notes