django - transaction

 def user_atomic():

     User.objects.create(name='purk1', email='[email protected]')

     User.objects.create(user_id='purk2', name='purk2', email='[email protected]')

     User.objects.create(name='purk3', email='[email protected]')

 @transaction.atomic

 def user_atomic_decorator():

     User.objects.create(name='purk1', email='[email protected]')

     User.objects.create(user_id='purk2', name='purk2', email='[email protected]')

     User.objects.create(name='purk3', email='[email protected]')

 @transaction.atomic

 def user_atomic_decorator_1():

     User.objects.create(name='purk1', email='[email protected]')

     try:

         with transaction.atomic():

             User.objects.create(user_id='purk2', name='purk2', email='[email protected]')

     except Exception as e:

         e

     User.objects.create(name='purk3', email='[email protected]')

 @transaction.atomic

 def user_atomic_decorator_except():

     User.objects.create(name='purk1', email='[email protected]')

     try:

         User.objects.create(user_id='purk2', name='purk2', email='[email protected]')

     except Exception as e:

         e

     User.objects.create(name='purk3', email='[email protected]') 

atomic

user_id 为uuid类型，所以user_id='purk2'肯定会出错，

result:

在atomic中错误的使用try except则会抛出TransactionManagementError的异常，同时transaction失效了，没有正常回滚。

用atomic装饰之后，里面的结果就被回滚了，但是用try except包裹的atomic不会影响外层的transaction回滚