Allow group level issues to set and read weight

issue_weights feature availability was checked only against
an issues's project. We should check against a group
when the issue is directly associated with one

ee/app/models/concerns/ee/issuable.rb

@@ -18,7 +18,7 @@ def supports_weight?
     end
 
     def weight_available?
-      supports_weight? && project&.feature_available?(:issue_weights)
+      supports_weight?
     end
 
     def sla_available?

ee/app/models/ee/issue.rb

@@ -198,6 +198,11 @@ def supports_weight?
       !work_item_type&.incident?
     end
 
+    override :weight_available?
+    def weight_available?
+      super && resource_parent&.licensed_feature_available?(:issue_weights)
+    end
+
     override :supports_iterations?
     def supports_iterations?
       !work_item_type&.incident?

ee/spec/models/issue_spec.rb

@@ -499,6 +499,62 @@
     end
   end
 
+  describe '#weight_available?' do
+    subject { issue.weight_available? }
+
+    context 'when issue belongs to a project' do
+      let(:issue) { build_stubbed(:issue) }
+
+      context 'when weights feature is available' do
+        before do
+          stub_licensed_features(issue_weights: true)
+        end
+
+        it { is_expected.to be_truthy }
+
+        context 'when issue is of type incident' do
+          let(:issue) { build_stubbed(:issue, :incident) }
+
+          it { is_expected.to be_falsey }
+        end
+      end
+
+      context 'when weights feature is not available' do
+        before do
+          stub_licensed_features(issue_weights: false)
+        end
+
+        it { is_expected.to be_falsey }
+      end
+    end
+
+    context 'when issue belongs to a group' do
+      let(:issue) { build_stubbed(:issue, :group_level) }
+
+      context 'when weights feature is available' do
+        before do
+          stub_licensed_features(issue_weights: true)
+        end
+
+        it { is_expected.to be_truthy }
+
+        context 'when issue is of type incident' do
+          let(:issue) { build_stubbed(:issue, :group_level, :incident) }
+
+          it { is_expected.to be_falsey }
+        end
+      end
+
+      context 'when weights feature is not available' do
+        before do
+          stub_licensed_features(issue_weights: false)
+        end
+
+        it { is_expected.to be_falsey }
+      end
+    end
+  end
+
   describe '.simple_sorts' do
     it 'includes weight with other base keys' do
       expect(described_class.simple_sorts.keys).to match_array(

ee/spec/requests/api/graphql/mutations/work_items/update_spec.rb

@@ -7,10 +7,11 @@
 
   let_it_be(:group) { create(:group) }
   let_it_be(:project) { create(:project, group: group) }
-  let_it_be(:reporter) { create(:user).tap { |user| project.add_reporter(user) } }
-  let_it_be(:guest) { create(:user).tap { |user| project.add_guest(user) } }
-  let_it_be(:work_item, refind: true) { create(:work_item, project: project) }
+  let_it_be(:reporter) { create(:user).tap { |user| group.add_reporter(user) } }
+  let_it_be(:guest) { create(:user).tap { |user| group.add_guest(user) } }
+  let_it_be(:project_work_item, refind: true) { create(:work_item, project: project) }
 
+  let(:work_item) { project_work_item }
   let(:mutation) { graphql_mutation(:workItemUpdate, input.merge('id' => work_item.to_global_id.to_s), fields) }
 
   let(:mutation_response) { graphql_mutation_response(:work_item_update) }
@@ -223,6 +224,12 @@
             it_behaves_like 'work item is not updated'
           end
         end
+
+        context 'when the work item is directly associated with a group' do
+          let(:work_item) { create(:work_item, :group_level, namespace: group) }
+
+          it_behaves_like 'update work item weight widget'
+        end
       end
 
       it_behaves_like 'user without permission to admin work item cannot update the attribute'