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How To: Set :host and :port for all devise mailer urls

brendon edited this page · 3 revisions
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If you find yourself needing to set a :host and :port for your mailer url's (e.g. when sending a reset password link) follow the instructions for overriding the devise mailer and then follow these steps:

Create a file in app/concerns called default_url_options.rb. Depending on your version of Rails you might need to add a setting to your environment that loads files from this folder automatically.

In this file put something like the following:

module DefaultUrlOptions

  # Including this file sets the default url options. This is useful for mailers or background jobs

  def default_url_options
      :host => host,
      :port => port


  def host
    # Your logic for figuring out what the hostname should be

  def port
    # Your logic for figuring out what the port should be


Next, just include this module in your devise mailer:

class UserMailer < Devise::Mailer   
  include DefaultUrlOptions


It's worthwhile noting that you'll need to be able to figure out the host and port in the above example without having access to any request object as mailers and background jobs run outside the context of the request.

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