django - transaction

 def user_atomic():
     User.objects.create(name='purk1', email='pwu1@maxprocessing.com')

     User.objects.create(user_id='purk2', name='purk2', email='pwu2@maxprocessing.com')

     User.objects.create(name='purk3', email='pwu3@maxprocessing.com')

 @transaction.atomic
 def user_atomic_decorator():
     User.objects.create(name='purk1', email='pwu1@maxprocessing.com')

     User.objects.create(user_id='purk2', name='purk2', email='pwu2@maxprocessing.com')

     User.objects.create(name='purk3', email='pwu3@maxprocessing.com')

 @transaction.atomic
 def user_atomic_decorator_1():
     User.objects.create(name='purk1', email='pwu1@maxprocessing.com')

     try:
         with transaction.atomic():
             User.objects.create(user_id='purk2', name='purk2', email='pwu2@maxprocessing.com')
     except Exception as e:
         e
     User.objects.create(name='purk3', email='pwu3@maxprocessing.com')

 @transaction.atomic
 def user_atomic_decorator_except():
     User.objects.create(name='purk1', email='pwu1@maxprocessing.com')
     try:
         User.objects.create(user_id='purk2', name='purk2', email='pwu2@maxprocessing.com')
     except Exception as e:
         e
     User.objects.create(name='purk3', email='pwu3@maxprocessing.com') 

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