method

url_for

v1.1.6 - Show latest stable - 3 notes - Class: ActionView::Helpers::UrlHelper

url_for(options = {}, *parameters_for_method_reference) public

Returns the URL for the set of options provided. This takes the same options as url_for. For a list, see the documentation for ActionController::Base#url_for. Note that it’ll set :only_path => true so you’ll get /controller/action instead of the http://example.com/controller/action part (makes it harder to parse httpd log files)

When called from a view, url_for returns an HTML escaped url. If you need an unescaped url, pass :escape => false to url_for.

Show source

# File actionpack/lib/action_view/helpers/url_helper.rb, line 20
      def url_for(options = {}, *parameters_for_method_reference)
        if options.kind_of? Hash
          options = { :only_path => true }.update(options.symbolize_keys)
          escape = options.key?(:escape) ? options.delete(:escape) : true
        else
          escape = true
        end
        url = @controller.send(:url_for, options, *parameters_for_method_reference)
        escape ? html_escape(url) : url
      end

March 20, 2009

9 thanks

Use the current URL, with changes

You can use the current URL, whatever it is, with changes, as in:

# Create a link to the current page in RSS form
url_for(:overwrite_params => {:format => :rss})

This can be super-helpful because it preserves any GET params (like search parameters)

March 3, 2011

8 thanks

Using namespaces

If you are using a namespace in your routes.rb, for example:

namespace :admin do
  resources :products
end

then you can:

url_for([:admin, @product])

and:

url_for([:edit, :admin, @product])

August 24, 2012

0 thanks

Specify :host option in emails

Emails need a fully qualified URL (with domain). Use the :host parameter.

But note also that you need to specify a value that is not dependent upon the request context. http://api.rubyonrails.org/classes/ActionMailer/Base.html recommends setting a default host in application.rb For those of us who have development, test, staging and production environments, set in the environment-specific files, or in the :default hash in the mailer.

This applies to both +url_for(:host => “example.com”)+ and when using named routes as in +widgets_url(:host => “example.com”)+

url_for

Related methods

Use the current URL, with changes

Using namespaces

Specify :host option in emails