create() 接受 1 个位置参数，但给出了 2 个。 Django 休息框架，。如何解决？

Question

我是 Django restframework 的新手，我想注册一个新学生到学校，但它不起作用。我尝试了很多解决方案。我得到的是：create() 需要 1 个位置参数，但是当我尝试发布时给出了 2 个。我不确定我在视图集中的代码是否正确。有人可以帮我吗？

 In my serializers.py:
 class StudentSerializer(serializers.Serializer):
  class Meta:
    model = Student
    fields = ['first_name']


class SchoolSerializer(serializers.Serializer):
is_existing_student = = serializers.BooleanField()
student = StudentSerializer(many=True)

 class Meta:
    model = School
    fields = ['is_existing_student', 'name', 'city', 'street', 'student']

  def create(self, **validated_data):
    student_data = validated_data.pop('student')
    school_instance = School.objects.create(**validated_data)
    for student_data in student_data:
        Student.objects.create(school_instance=school_instance, **student_data)
    return school_instance

  

在我看来.py：

  class SchoolViewSet(mixins.CreateModelMixin, RetrieveModelMixin, 
  ListModelMixin, GenericViewSet):

      serializer_class = SchoolSerializer
      queryset = School.objects.all()

      @action(detail=True, methods=['POST'])
      def school(self, request, *args, **kwargs):
          school = self.get_object()
          if serializer.is_valid():
             School.create(school=school, name='name', street='street', city='city', 
                           student='student')
             school.save()
          else:
             return Response(status=status.HTTP_204_NO_CONTENT) 
      

在我的网址中：

  router.register(r'register', SchoolViewSet)

 

 

Answer 1

在创建函数中，你不应该解压验证数据。所以创建函数定义应该是这样的

class SchoolSerializer(serializers.Serializer):
 is_existing_student = = serializers.BooleanField()
 student = StudentSerializer(many=True)

 class Meta:
    model = School
    fields = ['is_existing_student', 'name', 'city', 'street', 'student']

  def create(self, validated_data):
    student_data = validated_data.pop('student')
    school_instance = School.objects.create(**validated_data)
    for student_data in student_data:
        Student.objects.create(school_instance=school_instance, **student_data)
    return school_instance

同样在视图部分，您复制了 School 对象的创建。序列化器已经负责创建学校实例

  class SchoolViewSet(mixins.CreateModelMixin, RetrieveModelMixin, 
  ListModelMixin, GenericViewSet):

      serializer_class = SchoolSerializer
      queryset = School.objects.all()

      @action(detail=True, methods=['POST'])
      def school(self, request, *args, **kwargs):
          school_serializer = self.get_serializer(data=request.data)
          if school_serializer.is_valid():
             school_serializer.save()
          else:
             return Response(status=status.HTTP_204_NO_CONTENT)