Add observing hooks to ARes

activeresource/lib/active_resource/base.rb

@@ -804,7 +804,8 @@ def dup
     #   my_company.size = 10
     #   my_company.save # sends PUT /companies/1 (update)
     def save
-      new? ? create : update
+      notify(:before_save)
+      (new? ? create : update).tap { notify(:after_save) }
     end
 
     # Deletes the resource from the remote service.
@@ -820,7 +821,8 @@ def save
     #   new_person.destroy
     #   Person.find(new_id) # 404 (Resource Not Found)
     def destroy
-      connection.delete(element_path, self.class.headers)
+      notify(:before_destroy)
+      connection.delete(element_path, self.class.headers).tap { notify(:after_destroy) }
     end
 
     # Evaluates to <tt>true</tt> if this resource is not <tt>new?</tt> and is
@@ -995,16 +997,20 @@ def connection(refresh = false)
 
       # Update the resource on the remote service.
       def update
+        notify(:before_update)
         connection.put(element_path(prefix_options), encode, self.class.headers).tap do |response|
           load_attributes_from_response(response)
+          notify(:after_update)
         end
       end
 
       # Create (i.e., \save to the remote service) the \new resource.
       def create
+        notify(:before_create)
         connection.post(collection_path, encode, self.class.headers).tap do |response|
           self.id = id_from_response(response)
           load_attributes_from_response(response)
+          notify(:after_create)
         end
       end
 
@@ -1088,5 +1094,6 @@ def method_missing(method_symbol, *arguments) #:nodoc:
   class Base
     extend ActiveModel::Naming
     include CustomMethods, Validations
+    include ActiveModel::Observing
   end
 end

activeresource/test/observing_test.rb

@@ -0,0 +1,53 @@
+require 'abstract_unit'
+
+class ObservingTest < Test::Unit::TestCase
+  cattr_accessor :history
+
+  class PersonObserver < ActiveModel::Observer
+    observe :person
+
+    %w( after_create after_destroy after_save after_update
+        before_create before_destroy before_save before_update).each do |method|
+          define_method(method) { log method }
+    end
+
+    private
+      def log(method)
+        (ObservingTest.history ||= []) << method.to_sym
+      end
+  end
+
+  def setup
+    @matz = { :id => 1, :name => 'Matz' }.to_xml(:root => 'person')
+
+    ActiveResource::HttpMock.respond_to do |mock|
+      mock.get    "/people/1.xml", {}, @matz
+      mock.post   "/people.xml", {}, @matz, 201, 'Location' => '/people/1.xml'
+      mock.put    "/people/1.xml", {}, nil, 204
+      mock.delete "/people/1.xml", {}, nil, 200
+    end
+
+    PersonObserver.instance
+  end
+
+  def teardown
+    self.history = nil
+  end
+
+  def test_create_fires_save_and_create_notifications
+    rick = Person.create(:name => 'Rick')
+    assert_equal [:before_save, :before_create, :after_create, :after_save], self.history
+  end
+
+  def test_update_fires_save_and_update_notifications
+    person = Person.find(1)
+    person.save
+    assert_equal [:before_save, :before_update, :after_update, :after_save], self.history
+  end
+
+  def test_destroy_fires_destroy_notifications
+    person = Person.find(1)
+    person.destroy
+    assert_equal [:before_destroy, :after_destroy], self.history
+  end
+end