CSS Images in Email With Rails 3

Question

I\'m trying to send out an email with Rails 3 and Action Mailer. The email goes out fine, but I want it to be HTML formatted with some basic styling which includes backgroun

Answer 1

Pass your request host as a parameter to the mailer method, and then pass it from the method to the view. So, for example, your mailer method might look like this (example lifted from rails docs and modified here):

class UserMailer < ActionMailer::Base
  default :from => "notifications@example.com"

  def registration_confirmation(user, host)
    @user = user
    @host = host
    mail(:to => user.email, :subject => "Welcome to My Awesome Site")
  end
end

You would call it like this:

def some_action
    UserMailer.registration_confirmation(@user, request.host).deliver
end

Then in your view, you would just use the @host:

This is all assuming the image server is the same as the server running the request. If the image server is hosted elsewhere, you have to output a constant here. You could put something like this in lib/settings.rb:

module Settings
  IMAGE_HOST = 'superawesome.images.com'
end

Then in your view, you'd just output the constant there, like this: