Helper methods, ActionView and ActionController

问题

I have a method in application_contoller.rb that includes a call to send_file. I'm calling it from a partial that's rendered by javascript, and getting the following error -

ActionView::Template::Error (undefined method `send_file' for #<#<Class:0x0...

I can kind of see what's happening - send_file is a controller method, so unavailable in the way I'm using it - my question is, how do I make it available?

回答1:

You can define your method in controller as helper method:

helper_method :send_file

来源：https://stackoverflow.com/questions/27418340/helper-methods-actionview-and-actioncontroller