Access helpers from mailer?

Question

I have trying to access helper methods from a rails 3 mailer in order to access the current user for the session.

I put the helper :application in my mailer class,

Answer 1

This is a very old question, but I don't see the full answer, so I will try as I didn't find another resource.

It depends on what you are doing with the methods that have been defined in the helper module. If they are class methods, and everything that's not called on a specific instance seem to be a class methods for 3.2.13, you need to use

extend ApplicationHelper

if an instance methods

include ApplicationHelper

and if you want to use them in a mailer view

helper ApplicationHelper