一次更新多个对象

Question

我有一个函数可以将用户创建的所有对象更新为非活动状态。所以我这样编码：

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（这意味着未设置 false），只有当我使用附加关键字 pk=ANY_ID 指定过滤器时，但我想更新所有对象，如其描述的在 docs!

Answer 1

在这种情况下，替换您的以下行，

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

具有以下内容：

tmp.active = False
tmp.save()

已编辑

因为 'tmp' 是你的 myModel 的一个对象，它 returns 只有一个对象，因为你正在使用 pk 来检索它。

Answer 2

改变

# 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)

至

# 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

Updating multiple objects at once

django

django-views