django rest JSONWebTokenAPIView 序列化器类对象没有属性 'object'

Question

我正在将 JSONWebTokenAPIView 从 rest_framework_jwt 扩展到我的自定义 View :

class UserLogin(JSONWebTokenAPIView):

     serializer_class = serializers.AdabaziUserLoginJWT

这是我的自定义序列化器类:

class AdabaziUserLoginJWT(serializers.Serializer):
    username = serializers.CharField()
    password = serializers.CharField(style = {'input-type':'password'})
    status = serializers.SerializerMethodField(method_name='show_status')
    #token = serializers.CharField(read_only=True)

    class Meta():
        model = Adabazi_user
        fields = ('status')

    def show_status(self,obj):
        return obj.status

    def validate(self,attrs):

        credentials={
        'username' : attrs.get('username'),
        'password' : attrs.get('password')
        }

        user = authenticate(**credentials)
        if user :
            if user.is_active:
                ada_user = Adabazi_user.objects.get(user=user)
                if ada_user.status ==1:
                    ada_user.status = 2 #user is logged in right now
                    ada_user.updated_at = timezone.now()
                    user.last_login = timezone.now()
                    payload = jwt_payload_handler(user)
                    token = jwt_encode_handler(payload)
                    return {
                            'token':token,
                            'user':user,
                            'adabazi_user' : ada_user}
                else:
                    raise serializers.ValidationError('User is already logged in.')
            else:
                raise serializers.ValidationError('Account is deactivated.')
        else:
            raise serializers.ValidationError('User credentials failed.')

    def create(self,validated_data):
        user = validated_data['user']
        adabazi_user = validated_data['adabazi_user']
        user.save()
        ada_user.save()
        return ada_user

但是当我想POST username 和password 到localhost/api/user/login/ 时此网址与我的观点相关联；发生此错误:

在这行代码中，JSONWebTokenAPIView的post方法报错user = serializer.object.get('user') or request.user

Exception Value: 'AdabaziUserLoginJWT' object has no attribute 'object'

如何访问序列化程序实例对象属性？序列化程序是否有任何对象属性？

Answer 1

我最近遇到了同样的错误，看起来问题出在 rest_framework_jwt 库和 rest_framework 本身的集成:rest_framework_jwt 似乎还没有用 rest_framework 的最新版本更新，而 rest_framework 的序列化器中的代码发生了变化(参见 here)。

在 rest_framework 的新版本中，没有像 serializer.object.get 这样的语法，因为:

Previously the serializers used a two-step object creation, as follows:

Validating the data would create an object instance. This instance would be >available as serializer.object. Calling serializer.save() would then save the object instance to the database.

We now use single-step object creation, like so:

Validating the data makes the cleaned data available as serializer.validated_data. Calling serializer.save() then saves and returns the new object instance.

因此，为了使用此类，您必须使用 rest_framework 的新 API 更新它。