ruby on rails - RubyOnRails: url_for application root -

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i know doing

url_for(:only_path => false, :controller => 'home')

i get, example, http://localhost/home

but how handle genereate http://localhost

depending on goals are, there few ways use server name or base url. general case of, "i need reliable base url can use anywhere," use config method.

# via routes.rb map.root :controller => "foo", :action => "bar" # view/controller: root_url # inflexible. root_url ever 1 url  # via request object url_for("http://"+request.host) # not available in models  # via config file (see railscast 85) # environment.rb app_config = yaml.load_file("#{rails_root}/config/config.yml")[rails_env] # config/config.yml development:   server_name: localhost:3000 production:    server_name: foo.com # view/controller: url_for(app_config('server_name'))

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