Make AssociationCollection start transactions in the correct database.

AssociationCollection now starts transactions by calling
AssociationCollection#transaction instead of @owner.transaction or
@reflection.klass.transaction.

Signed-off-by: Michael Koziarski <michael@koziarski.com>

[#1081 state:committed]

1 files changed, 9 insertions, 0 deletions

diff --git a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
index c1d4ea8b50..2949f1d304 100644
--- a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
@@ -738,4 +738,13 @@ class HasAndBelongsToManyAssociationsTest < ActiveRecord::TestCase
     # Array#count in Ruby >=1.8.7, which would raise an ArgumentError
     assert_nothing_raised { david.projects.count(:all, :conditions => '1=1') }
   end
+
+  uses_mocha 'mocking Post.transaction' do
+    def test_association_proxy_transaction_method_starts_transaction_in_association_class
+      Post.expects(:transaction)
+      Category.find(:first).posts.transaction do
+        # nothing
+      end
+    end
+  end
 end