Move a user's abuse reports to the ghost user

... when the user is destroyed.

To clarify, this regards abuse reports that the to-be-deleted user has _reported_.

app/services/concerns/users/migrate_to_ghost_user.rb

@@ -11,7 +11,7 @@ module Users::MigrateToGhostUser
 
   def move_associated_records_to_ghost_user(user)
     # Block the user before moving records to prevent a data race.
-    # For example, if the user creates an issue after `move_issues_to_ghost_user`
+    # For example, if the user creates an issue after `migrate_issues`
     # runs and before the user is destroyed, the destroy will fail with
     # an exception.
     user.block
@@ -19,9 +19,10 @@ module Users::MigrateToGhostUser
     user.transaction do
       @ghost_user = User.ghost
 
-      move_issues_to_ghost_user(user)
-      move_merge_requests_to_ghost_user(user)
-      move_notes_to_ghost_user(user)
+      migrate_issues(user)
+      migrate_merge_requests(user)
+      migrate_notes(user)
+      migrate_abuse_reports(user)
     end
 
     user.reload
@@ -29,15 +30,19 @@ module Users::MigrateToGhostUser
 
   private
 
-  def move_issues_to_ghost_user(user)
+  def migrate_issues(user)
     user.issues.update_all(author_id: ghost_user.id)
   end
 
-  def move_merge_requests_to_ghost_user(user)
+  def migrate_merge_requests(user)
     user.merge_requests.update_all(author_id: ghost_user.id)
   end
 
-  def move_notes_to_ghost_user(user)
+  def migrate_notes(user)
     user.notes.update_all(author_id: ghost_user.id)
   end
+
+  def migrate_abuse_reports(user)
+    AbuseReport.where(reporter_id: user.id).update_all(reporter_id: ghost_user.id)
+  end
 end

spec/services/users/destroy_service_spec.rb

@@ -162,6 +162,13 @@ describe Users::DestroyService, services: true do
           let(:created_record) { create(:note, project: project, author: user) }
         end
       end
+
+      context 'abuse reports' do
+        include_examples "migrating a deleted user's associated records to the ghost user", AbuseReport, { skip_assignee_specs: true } do
+          let(:created_record) { create(:abuse_report, reporter: user, user: create(:user)) }
+          let(:author_method) { :reporter }
+        end
+      end
     end
   end
 end