update_attribute(s) added to Active Resource

Signed-off-by: Joshua Peek <josh@joshpeek.com>

activeresource/lib/active_resource/base.rb

@@ -1099,6 +1099,36 @@ def load(attributes)
       self
     end
 
+  # Updates a single attribute and then saves the object.
+  # 
+  # Note: Unlike ActiveRecord::Base.update_attribute, this method <b>is</b>
+  # subject to normal validation routines as an update sends the whole body
+  # of the resource in the request.  (See Validations). 
+  # 
+  # As such, this method is equivalent to calling update_attributes with a single attribute/value pair. 
+  # 
+  # If the saving fails because of a connection or remote service error, an
+  # exception will be raised.  If saving fails because the resource is
+  # invalid then <tt>false</tt> will be returned. 
+  def update_attribute(name, value) 
+    self.send("#{name}=".to_sym, value)
+    self.save
+  end 
+
+
+  # Updates this resource with all the attributes from the passed-in Hash
+  # and requests that the record be saved. 
+  # 
+  # If the saving fails because of a connection or remote service error, an
+  # exception will be raised.  If saving fails because the resource is
+  # invalid then <tt>false</tt> will be returned. 
+  # 
+  # Note: Though this request can be made with a partial set of the
+  # resource's attributes, the full body of the request will still be sent
+  # in the save request to the remote service. 
+  def update_attributes(attributes) 
+    load(attributes) && save 
+  end  
     # For checking <tt>respond_to?</tt> without searching the attributes (which is faster).
     alias_method :respond_to_without_attributes?, :respond_to?
 

activeresource/test/cases/base_test.rb

@@ -11,12 +11,12 @@ def setup
     @matz  = { :id => 1, :name => 'Matz' }.to_xml(:root => 'person')
     @david = { :id => 2, :name => 'David' }.to_xml(:root => 'person')
     @greg  = { :id => 3, :name => 'Greg' }.to_xml(:root => 'person')
-    @addy  = { :id => 1, :street => '12345 Street' }.to_xml(:root => 'address')
+    @addy  = { :id => 1, :street => '12345 Street', :country => 'Australia' }.to_xml(:root => 'address')
     @default_request_headers = { 'Content-Type' => 'application/xml' }
     @rick = { :name => "Rick", :age => 25 }.to_xml(:root => "person")
     @people = [{ :id => 1, :name => 'Matz' }, { :id => 2, :name => 'David' }].to_xml(:root => 'people')
     @people_david = [{ :id => 2, :name => 'David' }].to_xml(:root => 'people')
-    @addresses = [{ :id => 1, :street => '12345 Street' }].to_xml(:root => 'addresses')
+    @addresses = [{ :id => 1, :street => '12345 Street', :country => 'Australia' }].to_xml(:root => 'addresses')
 
     # - deep nested resource -
     # - Luis (Customer)
@@ -813,6 +813,55 @@ def test_update_conflict
     assert_raise(ActiveResource::ResourceConflict) { Person.find(2).save }
   end
 
+
+  ######
+  # update_attribute(s)(!)
+
+  def test_update_attribute_as_symbol
+    matz = Person.first
+    matz.expects(:save).returns(true)
+
+    assert_equal "Matz", matz.name
+    assert matz.update_attribute(:name, "David")
+    assert_equal "David", matz.name
+  end
+
+  def test_update_attribute_as_string
+    matz = Person.first
+    matz.expects(:save).returns(true)
+
+    assert_equal "Matz", matz.name
+    assert matz.update_attribute('name', "David")
+    assert_equal "David", matz.name
+  end
+
+
+  def test_update_attributes_as_symbols
+    addy = StreetAddress.first(:params => {:person_id => 1})
+    addy.expects(:save).returns(true)
+
+    assert_equal "12345 Street", addy.street
+    assert_equal "Australia", addy.country
+    assert addy.update_attributes(:street => '54321 Street', :country => 'USA')
+    assert_equal "54321 Street", addy.street
+    assert_equal "USA", addy.country
+  end
+
+  def test_update_attributes_as_strings
+    addy = StreetAddress.first(:params => {:person_id => 1})
+    addy.expects(:save).returns(true)
+
+    assert_equal "12345 Street", addy.street
+    assert_equal "Australia", addy.country
+    assert addy.update_attributes('street' => '54321 Street', 'country' => 'USA')
+    assert_equal "54321 Street", addy.street
+    assert_equal "USA", addy.country
+  end
+
+
+  #####
+  # Mayhem and destruction
+
   def test_destroy
     assert Person.find(1).destroy
     ActiveResource::HttpMock.respond_to do |mock|