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

Answer 2

None of the *_path helpers are accessible by default inside of an email. It is necessary instead to use the *_url form of the wanted helper. So, for instance, instead of using user_path(@user) it is necessary to use user_url(@user). See at Action Mailer basics.

Answer 3

The single method version of promoting a method to being a helper that is available in ApplicationController also works in ActionMailer:

class ApplicationMailer < ActionMailer::Base
  helper_method :marketing_host

  def marketing_host
    "marketing.yoursite.com"
  end
end

from there you can call marketing_host from any of your mailer views

Answer 4

If you want to call helper method from ActionMailer you need to include helper (module) in Mailer file as, if Helper module name is “UserHelper”, then need to write following in Mailer file

class CommentMailer < ActionMailer::Base
    default :from => "Andre Fournier <andre@gfournier.com>"
    add_template_helper(UserHelper)
end

Or

class CommentMailer < ActionMailer::Base
    default :from => "Andre Fournier <andre@gfournier.com>"
    include UserHelper
end

Hope this is helpful.

Answer 5

I'm not sure exactly what you are doing here, but when I want to access current_user from a mailer, I make a mailer method that I pass the user to as an argument:

class CommentMailer < ActionMailer::Base
  default :from => "Andre Fournier <andre@gfournier.com>"

  def blog_comment(user)
    @recipients                   = user.email
    @from                         = "andre@gfournier.com"
    @sent_on                      = Time.now
    @timestamp                    = Time.now
    @user                         = user
  end
end

With the above, @user, as well as all the other instance variables, are accessible from inside the mailer views ./views/comment_mailer/blog_comment.html.erb and ./views/comment_mailer/blog_comment.text.erb

Separately, you can make a helper called

comment_mailer_helper.rb

and put into that helper any methods that you want to be available to your mailer's views. This seems to me more like what you might want, regarding helpers, because helpers are designed to help views, whereas a mailer is analogous to a controller.

Answer 6

You could try mixing in the required helper module:

class CommentMailer < ActionMailer::Base
  include ApplicationHelper
end