从新编写的TempFile中读取数据无效?IOerror在Ruby on Rails中关闭流

I am implementing in Ruby on Rails, and i have 2 views. In my first view i read in a file and show the first rows (this works fine), then in my second view ( in the method in the controller ) i write a temporary file. Just the same. And i want to show the content of this temporary file again. But this doesn't work, I always get the error : I am implementing in Ruby on Rails, and i have