How to use a route helper method from a file in the lib directory?

Question

I need to use the root_url method from a method defined in a file in the lib folder. Is that possible?

I tried including this line in my class:

include Rails.application.routes.url_helpers

but this gives me the error

Missing host to link to! Please provide :host parameter or set default_url_options[:host]

---

Edit: I found out that it works if I first initialize the routes:

def initialize_routes
  if Rails.env.development? || Rails.env.test?
    Rails.application.routes.default_url_options[:host] = 'localhost:3000' 
  elsif Rails.env.production?
    Rails.application.routes.default_url_options[:host] = 'example.com'
  end
end

Is there a better way to accomplish this? Maybe setting the routes in a config file?

Answer 1

@JDutil's #3 solution, as mentioned in the comments, is configuring the action mailer and not the router's routes. However, in the configuration you can perform the following:

In config/environments/development.rb and config/environments/test.rb:

MyApp::Application.configure do
  # other configuration ...
  config.after_initialize do
    Rails.application.routes.default_url_options[:host] = 'localhost:3000'
  end
end