Don't error out in system hook if user has `nil` datetime columns

Deleting a user would fail in the system hooks if the user had
`nil` column in `datetime` or `updated_at` fields.

Closes #43871

1 files changed, 8 insertions, 0 deletions

diff --git a/spec/services/system_hooks_service_spec.rb b/spec/services/system_hooks_service_spec.rb
index c40cd5b7548..a538d0c109a 100644
--- a/spec/services/system_hooks_service_spec.rb
+++ b/spec/services/system_hooks_service_spec.rb
@@ -70,6 +70,14 @@ describe SystemHooksService do
       expect(data[:project_visibility]).to eq('private')
     end
 
+    it 'handles nil datetime columns' do
+      user.update_attributes(created_at: nil, updated_at: nil)
+      data = event_data(user, :destroy)
+
+      expect(data[:created_at]).to be(nil)
+      expect(data[:updated_at]).to be(nil)
+    end
+
     context 'group_rename' do
       it 'contains old and new path' do
         allow(group).to receive(:path_was).and_return('old-path')