Recover usage of Todos counter cache20842-todos-queries-cache

We’re being kept up to date the counter data but we’re not using it.
The only thing which is not real if is the number of projects that the 
user read changes the number of todos can be stale for some time.

The counters will be sync just after the user receives a new todo or mark any as done

1 files changed, 2 insertions, 1 deletions

diff --git a/app/services/todo_service.rb b/app/services/todo_service.rb
index 6b48d68cccb..eb833dd82ac 100644
--- a/app/services/todo_service.rb
+++ b/app/services/todo_service.rb
@@ -144,8 +144,9 @@ class TodoService
   def mark_todos_as_done(todos, current_user)
     todos = current_user.todos.where(id: todos.map(&:id)) unless todos.respond_to?(:update_all)
 
-    todos.update_all(state: :done)
+    marked_todos = todos.update_all(state: :done)
     current_user.update_todos_count_cache
+    marked_todos
   end
 
   # When user marks an issue as todo