Ruby on Rails - 麻烦循环使用部分使用集合

I am having issues using the :collection command for a partial within a form I am creating in rails. I would ideally like to use the :collection command, so I can easily manipulate this section in my .rjs templates (the form will submit and reload the form when the check box is changed, it's a to-do list).I am having issues using the :collection comman