undefined method `before_action' for ActionMailer

Question

Trying to attach file to mail via before_action filter:

class UserMailer < ActionMailer::Base
  before_action :add_logo_attachment

  layout 'mail'
  default from: "\"Admin\" <[email protected]>",
      to: Proc.new {Admin.pluck(:email)}

  def send_mail
    mail(subject: 'Hello, admin!')
  end
  .
  .
  private

  def add_logo_attachment
    attachments.inline['logo.png'] = File.read(Rails.root.join('app/assets/images/logo.png'))
  end

end

And I get this error: undefined method `before_action' for UserMailer:Class There is the same example in Rails guides and I can't understand what's the difference between my code and the code in guides.

Solution 1

There's no callbacks for ActionMaler::Base in Rails 3

Solution 2

Check the beginning of your controller. Had a similar error where this...

  before_action :set_org, only: [:show, :edit, :update, :destroy]

got moved to above this accidently...

class OrgsController < ApplicationController

Move it back inside the class.

Comments

[Mindey I.]

Is there a way to do something similar?

[Swati Aggarwal]

@BrianArmstrong There's a way to implement this now. Refer accepted answer of stackoverflow.com/questions/17565784/…