Question

我有一个函数应该将用户创建的所有对象更新为非活动状态。所以我编码了这个：

def TurnOff(request, passed_id):
    if request.user.is_authenticated():

        #this should set all objects to an inactive state
        tmp = myModel.objects.filter(created_by=request.user).update(active=False)

        #this is to set one specific object to an active state again
        myModel = get_object_or_404(myModel, created_by=request.user, pk=passed_id)
        tmp = myModel.objects.filter(created_by=request.user, pk=passed_id).update(active=True)

        return HttpResponseRedirect("../started")

    else:
        return HttpResponseRedirect("/")

行tmp = myModel.objects.filter(created_by=request.user).update(active=False)不起作用（这意味着假未设置），只有当我使用附加关键字pk=ANY_ID指定过滤器时，我才想更新所有对象，如docs！

Answer 1

在这种情况下，请替换以下行

tmp = myModel.objects.filter(created_by=request.user, pk=passed_id).update(active=True)

以下内容：

tmp.active = False
tmp.save()

<强> EDITED

因为＆＃39; tmp＆＃39;是myModel的一个对象，它只返回一个对象，因为你使用pk来检索它。

Answer 2

更改

# after this line myModel is not Model anymore, but instance of myModel
# with created_by=request.user and pk=passed_id
myModel = get_object_or_404(myModel, created_by=request.user, pk=passed_id)
# so this line doesn't work
tmp = myModel.objects.filter(created_by=request.user, pk=passed_id).update(active=True)

到

# you want to update _one_ instance, don't you?
tmp = get_object_or_404(myModel, created_by=request.user, pk=passed_id)
tmp.active = True
tmp.save()

一次更新多个对象

2 个答案: