Replace the transaction {|transaction|..} semantics with a new Exception ActiveRecord::Rollback. Closes #8030 [Koz]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6754 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Replace the transaction {|transaction|..} semantics with a new Exception ActiveRecord::Rollback.   [Koz]
+
 * Oracle: extract column length for CHAR also.  #7866 [ymendel]
 
 * Document :allow_nil option for validates_acceptance_of since it defaults to true. [tzaharia]

activerecord/lib/active_record/base.rb

@@ -34,6 +34,8 @@ module ActiveRecord #:nodoc:
   end
   class ReadOnlyRecord < StandardError #:nodoc:
   end
+  class Rollback < StandardError #:nodoc:
+  end
   
   class AttributeAssignmentError < ActiveRecordError #:nodoc:
     attr_reader :exception, :attribute

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -56,14 +56,14 @@ module ActiveRecord
               begin_db_transaction 
               transaction_open = true
             end
-            yield self
-          end
+            yield
+        end
         rescue Exception => database_transaction_rollback
           if transaction_open
             transaction_open = false
             rollback_db_transaction
           end
-          raise
+          raise unless database_transaction_rollback.is_a? ActiveRecord::Rollback
         end
       ensure
         commit_db_transaction if transaction_open
@@ -79,11 +79,6 @@ module ActiveRecord
       # done if the transaction block raises an exception or returns false.
       def rollback_db_transaction() end
 
-      # Alias for rollback_db_transaction to be used when yielding the transaction
-      def rollback!
-        rollback_db_transaction
-      end
-
       # Alias for #add_limit_offset!.
       def add_limit!(sql, options)
         add_limit_offset!(sql, options) if options

activerecord/test/transactions_test.rb

@@ -149,13 +149,13 @@ class TransactionTest < Test::Unit::TestCase
   end
 
   def test_manually_rolling_back_a_transaction
-    Topic.transaction do |transaction|
+    Topic.transaction do 
       @first.approved  = true
       @second.approved = false
       @first.save
       @second.save
       
-      transaction.rollback!
+      raise ActiveRecord::Rollback
     end
 
     assert @first.approved?, "First should still be changed in the objects"