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

There should be a couple solutions for this.

1) when using root_url pass in the host param like:

root_url(:host => 'localhost')

That would need to be made to be environment specific though.

2) You should also be able to set the routes default_url_options like:

Rails.application.routes.default_url_options[:host]= 'localhost:3000'

3) Within your environment config files you should set the default_url_options as stated in the error. For example:

In config/environments/development.rb:

config.action_mailer.default_url_options[:host] = 'localhost'

In config/environments/test.rb:

config.action_mailer.default_url_options[:host] = 'localhost'

In config/environments/production.rb:

config.action_mailer.default_url_options[:host] = 'production.com'