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

Question

I have been googling for about 90 minutes now and still don\'t have an answer to this. Where do I set default_url_options? I\'ve already set it for conf

Answer 1

You can set default url options in the Application Controller:

class ApplicationController < ActionController::Base
  def default_url_options
    {:locale => I18n.locale}
  end
end

http://guides.rubyonrails.org/action_controller_overview.html#default_url_options

Answer 2

go to config/environments/test.rb

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

Answer 3

You need to add the following line at every environment:

config.action_mailer.default_url_options = { :host => "yourhost" }

That way, it can work in all environments and could be different from environment to environment. For example:

development.rb

config.action_mailer.default_url_options = { :host => "dev.yourhost.com" }

test.rb

config.action_mailer.default_url_options = { :host => "test.yourhost.com" }

production.rb

config.action_mailer.default_url_options = { :host => "www.yourhost.com" }

Answer 4

I solved the issue by configuring environment.rb as

YourApp::Application.default_url_options = YourApp::Application.config.action_mailer.default_url_options

You need to set default_url_options for action mailer against each environment like development, testing, staging and production etc.

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

Answer 5

Funny thing, that setting config.action_mailer.default_url_options does not help for me. Also, messing around with environment-independent settings in places I felt like it does not belong was not satisfying for me. Additionally, I wanted a solution that worked when generating urls in sidekiq/resque workers.

My approach so far, which goes into config/environments/{development, production}.rb:

MyApp::Application.configure do
    # Stuff omitted...

    config.action_mailer.default_url_options = {
      # Set things here as usual
    }
end

MyApp::Application.default_url_options = MyApp::Application.config.action_mailer.default_url_options

This works for me in rails >= 3.2.x.

Answer 6

Your::Application.routes.draw do
  default_url_options :host => "example.com"

  # ... snip ...
end

Somewhere in routes.rb :)