Question

我正在做基本的消息应用，用户可以发送消息给其他用户...

这里是我的models.py

class Messages(Model):
created_at = DateTimeField(null=True, blank=True, auto_now_add=True, editable=False,
                           verbose_name='Yaratılma Tarihi')
message = TextField(max_length=500, verbose_name='Mesaj', null=True, blank=True, )
sender = ForeignKey('dentis.User', verbose_name='Gönderen', related_name='User')
target = ForeignKey('dentis.User', verbose_name='Alıcı', related_name='target')
read_at = BooleanField(default=False, verbose_name='Okundu', blank=True, )

class Meta:
    verbose_name = 'Mesaj'
    verbose_name_plural = 'Mesajlar'

def __str__(self):
    return u'%s / %s/' % (self.sender.email, self.message[:15])

def get_type(self):
    return 'message'

这里我的其他api观点

class MessageAPIView(ModelViewSet):
serializer_class = MessageSerializer
filter_backends = (filters.DjangoFilterBackend,)
filter_class = MessageUserFilter
permission_classes = (AuthenticatedUserOnly,)

def get_user(self):
    if self.request.user.is_authenticated():
        return self.request.user
    else:
        raise Http404

def get_queryset(self):
    messages = Messages.objects.filter(
        Q(sender=self.get_user()) | Q(target=self.get_user())).order_by('-created_at').distinct()

    return messages

def perform_create(self, serializer):
    if self.request.user.is_authenticated():

        try:
            target_email = serializer.validated_data['target']['email']
            target = User.objects.get(email=target_email)
        except User.DoesNotExist:
            raise ValidationError('Hedef Kullanıcı bulunamadı')
        except KeyError:
            raise ValidationError('Hedef kullanıcı belirtilmedi')

        sender = self.request.user
        serializer.save(sender=sender, target=target)
    else:
        raise Http404

我的序列化工具

class MessageSerializer(ModelSerializer):
sender = UserMobileSerializer(read_only=True)
target = UserMobileSerializer()

class Meta:
    model = Messages
    fields = '__all__'

当我发送消息时，请返回此错误：

第163行，在perform_create中       target_email = serializer.validated_data ['target'] ['email']

TypeError：'用户'对象不可订阅

[28 / Apr / 2018 18:56:04]“POST / api / v1 / message / HTTP / 1.1”500 15742

我的用户模型使用

USERNAME_FIELD ='email'

不使用用户名字段

Answer 1

validated_data['target']为您提供目标字段的值 - 正如错误所示，它是User的一个实例。您可以使用普通属性语法来访问其字段。

target_email = serializer.validated_data['target'].email

TypeError：'User'对象不可订阅

1 个答案: