Merge branch 'mk-fix-issue-1843' into 'master'

Fix root groups redirecting to group owner

Closes #32474

See merge request !11465

app/models/namespace.rb

@@ -46,7 +46,7 @@ class Namespace < ActiveRecord::Base
   before_destroy(prepend: true) { prepare_for_destroy }
   after_destroy :rm_dir
-  scope :root, -> { where('type IS NULL') }
+  scope :for_user, -> { where('type IS NULL') }
   scope :with_statistics, -> do
     joins('LEFT JOIN project_statistics ps ON ps.namespace_id = namespaces.id')

app/models/user.rb

@@ -338,7 +338,7 @@ class User < ActiveRecord::Base
     end
     def find_by_full_path(path, follow_redirects: false)
-      namespace = Namespace.find_by_full_path(path, follow_redirects: follow_redirects)
+      namespace = Namespace.for_user.find_by_full_path(path, follow_redirects: follow_redirects)
       namespace&.owner
     end

spec/models/user_spec.rb

@@ -900,10 +900,20 @@ describe User, models: true do
     end
     context 'with a group route matching the given path' do
-      let!(:group) { create(:group, path: 'group_path') }
-      it 'returns nil' do
-        expect(User.find_by_full_path('group_path')).to eq(nil)
+      context 'when the group namespace has an owner_id (legacy data)' do
+        let!(:group) { create(:group, path: 'group_path', owner: user) }
+        it 'returns nil' do
+          expect(User.find_by_full_path('group_path')).to eq(nil)
+        end
+      end
+
+      context 'when the group namespace does not have an owner_id' do
+        let!(:group) { create(:group, path: 'group_path') }
+
+        it 'returns nil' do
+          expect(User.find_by_full_path('group_path')).to eq(nil)
+        end
       end
     end
   end