Don't rollback in teardown unless a transaction was started. Don't start a transaction in create_fixtures if a transaction is started. Closes #6282.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5270 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Don't rollback in teardown unless a transaction was started. Don't start a transaction in create_fixtures if a transaction is started.  #6282 [lukfugl, Jeremy Kemper]
+
 * Add #delete support to has_many :through associations.  Closes #6049 [Martin Landers]
 
 * Reverted old select_limited_ids_list postgresql fix that caused issues in mysql.  Closes #5851 [Rick]

activerecord/lib/active_record/fixtures.rb

@@ -252,7 +252,7 @@ class Fixtures < YAML::Omap
       end               
       all_loaded_fixtures.merge! fixtures_map  
 
-      connection.transaction do
+      connection.transaction(Thread.current['open_transactions'] == 0) do
         fixtures.reverse.each { |fixture| fixture.delete_existing_fixtures }
         fixtures.each { |fixture| fixture.insert_fixtures }
 
@@ -542,10 +542,10 @@ module Test #:nodoc:
       def teardown_with_fixtures
         return unless defined?(ActiveRecord::Base) && !ActiveRecord::Base.configurations.blank?
 
-        # Rollback changes.
-        if use_transactional_fixtures?
+        # Rollback changes if a transaction is active.
+        if use_transactional_fixtures? && !Thread.current['open_transactions'].zero?
           ActiveRecord::Base.connection.rollback_db_transaction
-          ActiveRecord::Base.send :decrement_open_transactions
+          Thread.current['open_transactions'] = 0
         end
         ActiveRecord::Base.verify_active_connections!
       end

activerecord/test/fixtures_test.rb

@@ -361,4 +361,30 @@ class ManyToManyFixturesWithClassDefined < Test::Unit::TestCase
   def test_this_should_run_cleanly
     assert true
   end
-end
+end
+
+
+class FixturesBrokenRollbackTest < Test::Unit::TestCase
+  def blank_setup; end
+  alias_method :ar_setup_with_fixtures, :setup_with_fixtures
+  alias_method :setup_with_fixtures, :blank_setup
+  alias_method :setup, :blank_setup
+
+  def blank_teardown; end
+  alias_method :ar_teardown_with_fixtures, :teardown_with_fixtures
+  alias_method :teardown_with_fixtures, :blank_teardown
+  alias_method :teardown, :blank_teardown
+
+  def test_no_rollback_in_teardown_unless_transaction_active
+    assert_equal 0, Thread.current['open_transactions']
+    assert_raise(RuntimeError) { ar_setup_with_fixtures }
+    assert_equal 0, Thread.current['open_transactions']
+    assert_nothing_raised { ar_teardown_with_fixtures }
+    assert_equal 0, Thread.current['open_transactions']
+  end
+
+  private
+    def load_fixtures
+      raise 'argh'
+    end
+end