Link_to root_path not working in mail view

问题

I am trying to add a basic link_to tag to a mail view.

notification.html.erb:

<%= link_to image_tag('S200.gif'), root_path  %>

error is undefined local variable or method 'root_path' Not very sure why as same bit of code (different image only) works perfectly fine in a normal controller view. root_path is correctly set in routes.

Does the mail view prevent it ?

回答1:

I believe the answer is 'yes'. I was just reading the docs this morning, and my understanding is that you need to use _url instead of _path.

来源：https://stackoverflow.com/questions/46820022/link-to-root-path-not-working-in-mail-view