Rendering partial from another folder from another partial in Rails 3

For example: I'm have two models: Task and List. Task belongs_to List. I'm render lists/_form.html.erb partial within lists/show.html.erb view. Now I need to render tasks/_fields.html.erb partial within lists/_form.html.erb partial:

<%= render 'tasks/fields' %>

But I get an error ActionView::MissingTemplate

If I try to render tasks/_fields.html.erb within lists/_form.html.erb, everything works.

I see two bad ways to solve this problem:

• Place _fields.html.erb to lists folder
• Make a view from lists/_form.html.erb partial and try a "Nested Layouts" from http://guides.rubyonrails.org/layouts_and_rendering.html

Is there a good way?