instance method `url_for`

Ruby on Rails 3.1.12

Since v2.2.3 Last seen in v3.2.22.5

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5

Compare with:

url_for(options = {})

Returns the URL for the set of options provided. This takes the same options as url_for in Action Controller (see the documentation for ActionController::Base#url_for). Note that by default :only_path is true so you’ll get the relative “/controller/action” instead of the fully qualified URL like “example.com/controller/action”.

Options

:anchor - Specifies the anchor name to be appended to the path.
:only_path - If true, returns the relative URL (omitting the protocol, host name, and port) (true by default unless :host is specified).
:trailing_slash - If true, adds a trailing slash, as in “/archive/2005/”. Note that this is currently not recommended since it breaks caching.
:host - Overrides the default (current) host if provided.
:protocol - Overrides the default (current) protocol if provided.
:user - Inline HTTP authentication (only plucked out if :password is also present).
:password - Inline HTTP authentication (only plucked out if :user is also present).

Relying on named routes

Passing a record (like an Active Record or Active Resource) instead of a Hash as the options parameter will trigger the named route for that record. The lookup will happen on the name of the class. So passing a Workshop object will attempt to use the workshop_path route. If you have a nested route, such as admin_workshop_path you’ll have to call that explicitly (it’s impossible for url_for to guess that route).

Examples

<%= url_for(:action => 'index') %>
# => /blog/

<%= url_for(:action => 'find', :controller => 'books') %>
# => /books/find

<%= url_for(:action => 'login', :controller => 'members', :only_path => false, :protocol => 'https') %>
# => https://www.example.com/members/login/

<%= url_for(:action => 'play', :anchor => 'player') %>
# => /messages/play/#player

<%= url_for(:action => 'jump', :anchor => 'tax&ship') %>
# => /testing/jump/#tax&ship

<%= url_for(Workshop.new) %>
# relies on Workshop answering a persisted? call (and in this case returning false)
# => /workshops

<%= url_for(@workshop) %>
# calls @workshop.to_param which by default returns the id
# => /workshops/5

# to_param can be re-defined in a model to provide different URL names:
# => /workshops/1-workshop-name

<%= url_for("http://www.example.com") %>
# => http://www.example.com

<%= url_for(:back) %>
# if request.env["HTTP_REFERER"] is set to "http://www.example.com"
# => http://www.example.com

<%= url_for(:back) %>
# if request.env["HTTP_REFERER"] is not set or is blank
# => javascript:history.back()

Parameters

options opt = {}

Source

# File actionpack/lib/action_view/helpers/url_helper.rb, line 100
      def url_for(options = {})
        options ||= {}
        case options
        when String
          options
        when Hash
          options = options.symbolize_keys.reverse_merge!(:only_path => options[:host].nil?)
          super
        when :back
          controller.request.env["HTTP_REFERER"] || 'javascript:history.back()'
        else
          polymorphic_path(options)
        end
      end

Defined in actionpack/lib/action_view/helpers/url_helper.rb line 100 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionView::Helpers::UrlHelper

Signature

Options

Relying on named routes

Examples

Parameters