在 put 请求中手动更新 django 模型实例。 Django Django 休息框架

Question

我通过公开父模型然后搜索 room_set 来执行放置请求的方式，因为我需要查看用户是否有权弄乱与父模型相关的对象。

现在，我正在尝试手动放置。

这个 put 更像是一个补丁，但是当我在本地使用 PATCH 时，CORS 策略不喜欢它。所以我放了。

所以我对下一步该做什么有点困惑。如果我在请求中没有任何数据，如何将新值添加到我的对象或忽略我的模型上的属性？

这是模型和放置请求。

class Room(models.Model):
    venue = models.ForeignKey(Venue, on_delete=models.CASCADE)
    name = models.CharField(max_length=100, null=True, blank=True)
    online = models.BooleanField(default=False)
    description = models.CharField(max_length=1000, blank=True, null=True)
    privateroom = models.BooleanField(default=False)
    semiprivateroom = models.BooleanField(default=False)
    seatedcapacity = models.CharField(max_length=10, null=True, blank=True)
    standingcapacity = models.CharField(max_length=10, null=True, blank=True)
    minimumspend = models.PositiveSmallIntegerField(blank=True, null=True)
    surroundsoundamenity = models.BooleanField(default=False)
    outdoorseatingamenity = models.BooleanField(default=False)
    stageamenity = models.BooleanField(default=False)
    televisionamenity = models.BooleanField(default=False)
    screenprojectoramenity = models.BooleanField(default=False)
    naturallightamenity = models.BooleanField(default=False)
    wifiamenity = models.BooleanField(default=False)
    wheelchairaccessibleamenity = models.BooleanField(default=False)
    cocktailseatingseatingoption = models.BooleanField(default=False)
    classroomseatingoption = models.BooleanField(default=False)
    ushapeseatingoption = models.BooleanField(default=False)
    sixtyroundseatingoption = models.BooleanField(default=False)
    boardroomseatingoption = models.BooleanField(default=False)
    theaterseatingoption = models.BooleanField(default=False)
    hallowsquareseatingoption = models.BooleanField(default=False)




 def put(self, request, *args, **kwargs):
        venuepk = kwargs.get('venuepk', None)
        venue = get_object_or_404(Venue, pk=venuepk)
        roompk = kwargs.get('roompk')
        venuerooms = Venue.room_set.all()
        roomobject = None
        for room in venuerooms:
            if room.pk == int(roompk):
                roomobject = Room.objects.get(pk = roompk)
                serialized = RoomSerializer(request.data)
                if serialized.is_valid(raise_exception=True):
                    data = serialized.validated_data
                    roomobject

所以我打印了序列化数据，得到了下面的内容。看起来它只不过是一个字典值，如果键不存在则设置一个默认值。

RoomSerializer(data={u'minimumspend': None, u'seatedcapacity': 50, u'standingcapacity': 65, u'name': u'The Dean', u'privateroom': u'privateroom'}):
    id = IntegerField(label='ID', read_only=True)
    name = CharField(allow_blank=True, allow_null=True, max_length=100, required=False)
    online = BooleanField(required=False)
    description = CharField(allow_blank=True, allow_null=True, max_length=1000, required=False)
    privateroom = BooleanField(required=False)
    semiprivateroom = BooleanField(required=False)
    seatedcapacity = CharField(allow_blank=True, allow_null=True, max_length=10, required=False)
    standingcapacity = CharField(allow_blank=True, allow_null=True, max_length=10, required=False)
    minimumspend = IntegerField(allow_null=True, max_value=32767, min_value=0, required=False)
    surroundsoundamenity = BooleanField(required=False)
    outdoorseatingamenity = BooleanField(required=False)
    stageamenity = BooleanField(required=False)
    televisionamenity = BooleanField(required=False)
    screenprojectoramenity = BooleanField(required=False)
    naturallightamenity = BooleanField(required=False)
    wifiamenity = BooleanField(required=False)
    wheelchairaccessibleamenity = BooleanField(required=False)
    cocktailseatingseatingoption = BooleanField(required=False)
    classroomseatingoption = BooleanField(required=False)
    ushapeseatingoption = BooleanField(required=False)
    sixtyroundseatingoption = BooleanField(required=False)
    boardroomseatingoption = BooleanField(required=False)
    theaterseatingoption = BooleanField(required=False)
    hallowsquareseatingoption = BooleanField(required=False)
    venue = PrimaryKeyRelatedField(queryset=Venue.objects.all())

Answer 1

试试这个而不是你的 put()

def put(self, request, *args, **kwargs):
    venuepk = kwargs.get('venuepk', None)
    if not venuepk:
        return Respose("venuepk is empty")
    venue = get_object_or_404(Venue, pk=venuepk)
    room = venue.room_set.all().get(id=int(roompk))
    # lets assume that you have to update different fields on different requests
    # So make a  'dict' that has 'key' same as in your `Room` model as below
    update_dict = {
        "description":"some description",
        "online":True,
        "minimumspend":10
    }
    room.update(**update_dict)
    return Response("updated")

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