Merge pull request #22821 from shosti/set-null-transaction

Allow add_to_transaction with null transaction

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

@@ -33,6 +33,7 @@ def set_state(state)
 
     class NullTransaction #:nodoc:
       def initialize; end
+      def state; end
       def closed?; true; end
       def open?; false; end
       def joinable?; false; end

activerecord/test/cases/transactions_test.rb

@@ -58,6 +58,11 @@ def transaction_with_return
     end
   end
 
+  def test_add_to_null_transaction
+    topic = Topic.new
+    topic.add_to_transaction
+  end
+
   def test_successful_with_return
     committed = false