django transaction用法

from django.db import transaction
from django.http import HttpResponse
from django.utils.decorators import method_decorator


# 類中添加裝飾器，保證在該類中所有的數據庫操作都在一個事物中
@method_decorator(transaction.atomic, name='dispatch')
class MyView1(object):
    
    def get(self, request):
        return HttpResponse('GET')
    
    def post(self, request):
        return HttpResponse('POST')


class MyView2(object):
    
    # 保證在該函數中所有的數據庫操作都在一個事物中
    @transaction.atomic
    def post(self, request):

        # 設置事物保存點（可設多個）
        t1 = transaction.savepoint()

        # 如果有異常情況可回滾到指定的保存點
        transaction.savepoint_rollback(t1)

        # 如果沒有異常可提交事物
        transaction.savepoint_commit(t1)
        return HttpResponse('POST')