From f11904ad6d0d9981dfb54b8fe07bfa908607db35 Mon Sep 17 00:00:00 2001 From: Michael Koziarski Date: Sun, 27 Jan 2008 01:18:47 +0000 Subject: Add documentation for polymorphic URL helpers, make API consistent for polymorphic_path and polymorphic_url. Closes #10883 [mislav] Closes #8782 [gbuesing] Closes #8720 [gbuesing] git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8741 5ecf4fe2-1ee6-0310-87b1-e25e094e27de --- .../lib/action_controller/polymorphic_routes.rb | 105 ++++++++++++++++++--- 1 file changed, 90 insertions(+), 15 deletions(-) (limited to 'actionpack/lib') diff --git a/actionpack/lib/action_controller/polymorphic_routes.rb b/actionpack/lib/action_controller/polymorphic_routes.rb index 94aefc9aae..ec883af26d 100644 --- a/actionpack/lib/action_controller/polymorphic_routes.rb +++ b/actionpack/lib/action_controller/polymorphic_routes.rb @@ -1,8 +1,75 @@ module ActionController + # Polymorphic URL helpers are methods for smart resolution to a named route call when + # given an ActiveRecord model instance. They are to be used in combination with + # ActionController::Resources. + # + # These methods are useful when you want to generate correct URL or path to a RESTful + # resource without having to know the exact type of the record in question. + # + # Nested resources and/or namespaces are also supported, as illustrated in the example: + # + # polymorphic_url([:admin, @article, @comment]) + # #-> results in: + # admin_article_comment_url(@article, @comment) + # + # == Usage within the framework + # + # Polymorphic URL helpers are used in a number of places throughout the Rails framework: + # + # * url_for, so you can use it with a record as the argument, e.g. + # url_for(@article); + # * ActionView::Helpers::FormHelper uses polymorphic_path, so you can write + # form_for(@article) without having to specify :url parameter for the form + # action; + # * redirect_to (which, in fact, uses url_for) so you can write + # redirect_to(post) in your controllers; + # * ActionView::Helpers::AtomFeedHelper, so you don't have to explicitly specify URLs + # for feed entries. + # + # == Prefixed polymorphic helpers + # + # In addition to polymorphic_url and polymorphic_path methods, a + # number of prefixed helpers are available as a shorthand to :action => "..." + # in options. Those are: + # + # * edit_polymorphic_url, edit_polymorphic_path + # * new_polymorphic_url, new_polymorphic_path + # * formatted_polymorphic_url, formatted_polymorphic_path + # + # Example usage: + # + # edit_polymorphic_path(@post) + # #=> /posts/1/edit + # + # formatted_polymorphic_path([@post, :pdf]) + # #=> /posts/1.pdf module PolymorphicRoutes + # Constructs a call to a named RESTful route for the given record and returns the + # resulting URL string. For example: + # + # polymorphic_url(post) + # # calls post_url(post) #=> "http://example.com/posts/1" + # + # ==== Options + # * :action -- specifies the action prefix for the named route: + # :new, :edit or :formatted. Default is no prefix. + # * :routing_type -- :path or :url (default :url). + # + # ==== Examples + # + # # an Article record + # polymorphic_url(record) #-> article_url(record) + # + # # a Comment record + # polymorphic_url(record) #-> comment_url(record) + # + # # it recognizes new records and maps to the collection + # record = Comment.new + # polymorphic_url(record) #-> comments_url() + # def polymorphic_url(record_or_hash_or_array, options = {}) - record = extract_record(record_or_hash_or_array) - + record = extract_record(record_or_hash_or_array) + format = (options[:action].to_s == "formatted" and record_or_hash_or_array.pop) namespace = extract_namespace(record_or_hash_or_array) args = case record_or_hash_or_array @@ -11,9 +78,11 @@ module ActionController else [ record_or_hash_or_array ] end + args << format if format + inflection = case - when options[:action] == "new" + when options[:action].to_s == "new" args.pop :singular when record.respond_to?(:new_record?) && record.new_record? @@ -27,8 +96,11 @@ module ActionController send!(named_route, *args) end - def polymorphic_path(record_or_hash_or_array) - polymorphic_url(record_or_hash_or_array, :routing_type => :path) + # Returns the path component of a URL for the given record. It uses + # polymorphic_url with :routing_type => :path. + def polymorphic_path(record_or_hash_or_array, options = {}) + options[:routing_type] = :path + polymorphic_url(record_or_hash_or_array, options) end %w(edit new formatted).each do |action| @@ -43,26 +115,29 @@ module ActionController EOT end - private def action_prefix(options) options[:action] ? "#{options[:action]}_" : "" end def routing_type(options) - "#{options[:routing_type] || "url"}" + options[:routing_type] || :url end def build_named_route_call(records, namespace, inflection, options = {}) - records = Array.new([extract_record(records)]) unless records.is_a?(Array) - base_segment = "#{RecordIdentifier.send!("#{inflection}_class_name", records.pop)}_" - - method_root = records.reverse.inject(base_segment) do |string, name| - segment = "#{RecordIdentifier.send!("singular_class_name", name)}_" - segment << string + unless records.is_a?(Array) + record = extract_record(records) + route = '' + else + record = records.pop + route = records.inject("") do |string, parent| + string << "#{RecordIdentifier.send!("singular_class_name", parent)}_" + end end - action_prefix(options) + namespace + method_root + routing_type(options) + route << "#{RecordIdentifier.send!("#{inflection}_class_name", record)}_" + + action_prefix(options) + namespace + route + routing_type(options).to_s end def extract_record(record_or_hash_or_array) @@ -78,7 +153,7 @@ module ActionController if record_or_hash_or_array.is_a?(Array) record_or_hash_or_array.delete_if do |record_or_namespace| if record_or_namespace.is_a?(String) || record_or_namespace.is_a?(Symbol) - namespace << "#{record_or_namespace.to_s}_" + namespace << "#{record_or_namespace}_" end end end -- cgit v1.2.3