How do I set default host for url helpers in rails?

by

asset_host doesn’t work for urls

You need to override default_url_options in your ApplicationController (at least in Rails 3)

http://edgeguides.rubyonrails.org/action_controller_overview.html#default-url-options

class ApplicationController < ActionController::Base
  def default_url_options
    if Rails.env.production?
      {:host => "myproduction.com"}
    else  
      {}
    end
  end
end

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