update_attributes and update_attributes! are now wrapped in a transaction

[#922 state:resovled]

Signed-off-by: José Valim <jose.valim@gmail.com>

activerecord/lib/active_record/persistence.rb

@@ -121,15 +121,19 @@ module ActiveRecord
     # Updates all the attributes from the passed-in Hash and saves the record. 
     # If the object is invalid, the saving will fail and false will be returned.
     def update_attributes(attributes)
-      self.attributes = attributes
-      save
+      with_transaction_returning_status do
+        self.attributes = attributes
+        save
+      end
     end
 
     # Updates an object just like Base.update_attributes but calls save! instead
     # of save so an exception is raised if the record is invalid.
     def update_attributes!(attributes)
-      self.attributes = attributes
-      save!
+      with_transaction_returning_status do
+        self.attributes = attributes
+        save!
+      end
     end
 
     # Initializes +attribute+ to zero if +nil+ and adds the value passed as +by+ (default is 1).

activerecord/test/cases/transactions_test.rb

@@ -3,10 +3,12 @@ require 'models/topic'
 require 'models/reply'
 require 'models/developer'
 require 'models/book'
+require 'models/author'
+require 'models/post'
 
 class TransactionTest < ActiveRecord::TestCase
   self.use_transactional_fixtures = false
-  fixtures :topics, :developers
+  fixtures :topics, :developers, :authors, :posts
 
   def setup
     @first, @second = Topic.find(1, 2).sort_by { |t| t.id }
@@ -103,6 +105,25 @@ class TransactionTest < ActiveRecord::TestCase
     end
   end
 
+  def test_update_attributes_should_rollback_on_failure
+    author = Author.find(1)
+    posts_count = author.posts.size
+    assert posts_count > 0
+    status = author.update_attributes(:name => nil, :post_ids => [])
+    assert !status
+    assert_equal posts_count, author.posts(true).size
+  end
+
+  def test_update_attributes_should_rollback_on_failure!
+    author = Author.find(1)
+    posts_count = author.posts.size
+    assert posts_count > 0
+    assert_raise(ActiveRecord::RecordInvalid) do
+      author.update_attributes!(:name => nil, :post_ids => [])
+    end
+    assert_equal posts_count, author.posts(true).size
+  end
+
   def test_cancellation_from_before_destroy_rollbacks_in_destroy
     add_cancelling_before_destroy_with_db_side_effect_to_topic
     begin

activerecord/test/models/author.rb

@@ -108,6 +108,8 @@ class Author < ActiveRecord::Base
     %w(twitter github)
   end
 
+  validates_presence_of :name
+
   private
     def log_before_adding(object)
       @post_log << "before_adding#{object.id || '<new>'}"