Don't attempt to update user tracked fields if database is in read-only

With Geo, attempting to view an endpoint with a user could result in an
Error 500 since Devise attempts to update the last sign-in IP and other
details.

Closes gitlab-org/gitlab-ee#4972

1 files changed, 8 insertions, 0 deletions

diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 1815696a8a0..3531de244bd 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -496,6 +496,14 @@ describe User do
         user2.update_tracked_fields!(request)
       end.to change { user2.reload.current_sign_in_at }
     end
+
+    it 'does not write if the DB is in read-only mode' do
+      expect(Gitlab::Database).to receive(:read_only?).and_return(true)
+
+      expect do
+        user.update_tracked_fields!(request)
+      end.not_to change { user.reload.current_sign_in_at }
+    end
   end
 
   shared_context 'user keys' do