[英]Django rollback not working after second objects.create fails to create a record
這是該視圖的代碼段:
@transaction.atomic()
def insert_in_sample_table(request):
try:
with transaction.atomic():
insert_obj = SampleTable1.objects.create(fld_id=2, fld_name='abc')
raise Exception ("This is manual exception")
insert_obj2 = SampleTable2.objects.create(fld_id=1, fld_name='xyz')
return HttpResponse("SUCCESS")
except Exception as e:
return HttpResponse(str(e))
有兩種模型:
SampleTable1
SampleTable2
我在第一次創建后手動引發了一個異常,現在我希望必須撤消在第一個模型(SampleTable1)中所做的更改。 但是不幸的是我看不到回滾
我在settings.py文件的DATABASE中添加了'ATOMIC_REQUESTS': True,
我刪除了
@transaction.atomic()
並檢查,它仍然不會回滾。
如何使第一個數據庫事務回滾?
您可以使用'@ transaction.atomic'裝飾器,如下所示:
@transaction.atomic
def insert_in_sample_table(request):
tra = transaction.savepoint()
try:
insert_obj = SampleTable1.objects.create(fld_id=2, fld_name='abc')
insert_obj2 = SampleTable2.objects.create(fld_id=1, fld_name='xyz')
transaction.savepoint_commit(tra)
return HttpResponse("SUCCESS")
except IntegrityError:
transaction.savepoint_rollback(tra)
return HttpResponse("DB ERROR")
如果使用多重數據庫,則應指定連接名稱並替換以下行:
with transaction.atomic():
為了這:
with transaction.atomic(using='connection_name'):
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