Method: ActionDispatch::Routing::PolymorphicRoutes#polymorphic_url

Defined in:
actionpack/lib/action_dispatch/routing/polymorphic_routes.rb

#polymorphic_url(record_or_hash_or_array, options = {}) ⇒ Object

Constructs a call to a named RESTful route for the given record and returns the resulting URL string. For example:

# calls post_url(post)
polymorphic_url(post) # => "http://example.com/posts/1"
polymorphic_url([blog, post]) # => "http://example.com/blogs/1/posts/1"
polymorphic_url([:admin, blog, post]) # => "http://example.com/admin/blogs/1/posts/1"
polymorphic_url([user, :blog, post]) # => "http://example.com/users/1/blog/posts/1"
polymorphic_url(Comment) # => "http://example.com/comments"

#### Options

  • :action - Specifies the action prefix for the named route: :new or :edit. Default is no prefix.

  • :routing_type - Allowed values are :path or :url. Default is :url.

Also includes all the options from url_for. These include such things as :anchor or :trailing_slash. Example usage is given below:

polymorphic_url([blog, post], anchor: 'my_anchor')
  # => "http://example.com/blogs/1/posts/1#my_anchor"
polymorphic_url([blog, post], anchor: 'my_anchor', script_name: "/my_app")
  # => "http://example.com/my_app/blogs/1/posts/1#my_anchor"

For all of these options, see the documentation for [url_for](ActionDispatch::Routing::UrlFor).

#### Functionality

# an Article record
polymorphic_url(record)  # same as article_url(record)

# a Comment record
polymorphic_url(record)  # same as comment_url(record)

# it recognizes new records and maps to the collection
record = Comment.new
polymorphic_url(record)  # same as comments_url()

# the class of a record will also map to the collection
polymorphic_url(Comment) # same as comments_url()



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# File 'actionpack/lib/action_dispatch/routing/polymorphic_routes.rb', line 110

def polymorphic_url(record_or_hash_or_array, options = {})
  if Hash === record_or_hash_or_array
    options = record_or_hash_or_array.merge(options)
    record  = options.delete :id
    return polymorphic_url record, options
  end

  if mapping = polymorphic_mapping(record_or_hash_or_array)
    return mapping.call(self, [record_or_hash_or_array, options], false)
  end

  opts   = options.dup
  action = opts.delete :action
  type   = opts.delete(:routing_type) || :url

  HelperMethodBuilder.polymorphic_method self,
                                         record_or_hash_or_array,
                                         action,
                                         type,
                                         opts
end