More EE->CE fixes

app/controllers/concerns/todos_actions.rb

 module TodosActions
-  include Gitlab::Utils::StrongMemoize
   extend ActiveSupport::Concern
 
   def create

app/controllers/projects/todos_controller.rb

 class Projects::TodosController < Projects::ApplicationController
+  include Gitlab::Utils::StrongMemoize
   include TodosActions
 
   before_action :authenticate_user!, only: [:create]

app/helpers/todos_helper.rb

@@ -171,9 +171,7 @@ module TodosHelper
   end
 
   def todo_group_options
-    groups = current_user.authorized_groups
-
-    groups = groups.map do |group|
+    groups = current_user.authorized_groups.map do |group|
       { id: group.id, text: group.full_name }
     end
 

app/models/todo.rb

 class Todo < ActiveRecord::Base
+  prepend EE::Todo
   include Sortable
 
   ASSIGNED           = 1
@@ -83,7 +84,7 @@ class Todo < ActiveRecord::Base
   end
 
   def parent
-    project || group
+    project
   end
 
   def unmergeable?

app/services/todo_service.rb

@@ -305,7 +305,6 @@ class TodoService
   def attributes_for_target(target)
     attributes = {
       project_id: target&.project&.id,
-      group_id: target.respond_to?(:group) ? target.group_id : nil,
       target_id: target.id,
       target_type: target.class.name,
       commit_id: nil

ee/app/controllers/groups/todos_controller.rb

 class Groups::TodosController < Groups::ApplicationController
+  include Gitlab::Utils::StrongMemoize
   include TodosActions
 
   before_action :authenticate_user!, only: [:create]

ee/app/models/ee/todo.rb

+module EE
+  module Todo
+    extend ::Gitlab::Utils::Override
+
+    override :parent
+    def parent
+      project || group
+    end
+  end
+end

ee/app/services/ee/todo_service.rb

 module EE
   module TodoService
+    extend ::Gitlab::Utils::Override
+
     def new_epic(epic, current_user)
       create_mention_todos(nil, epic, current_user)
     end
@@ -7,5 +9,16 @@ module EE
     def update_epic(epic, current_user, skip_users = [])
       create_mention_todos(nil, epic, current_user, nil, skip_users)
     end
+
+    override :attributes_for_target
+    def attributes_for_target(target)
+      attributes = super
+
+      if target.is_a?(Epic)
+        attributes[:group_id] = target.group_id
+      end
+
+      attributes
+    end
   end
 end