“超级”对象没有属性“set_context”

Question

我将 Django 版本从 1.11 升级到 3.2 并升级安装的 python。

我在这一行遇到错误

super().set_context(serializer_field)

下面是完整的类代码。

class UniqueForProjectValidator(UniqueValidator):

    def set_context(self, serializer_field):
        super().set_context(serializer_field)
        self.project = serializer_field.parent.context['project']

    def filter_queryset(self, value, queryset):
        queryset = queryset.filter(project=self.project)
        return super().filter_queryset(value, queryset)

这是错误

Traceback (most recent call last):
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\django\views\decorators\csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\viewsets.py", line 125, in view
    return self.dispatch(request, *args, **kwargs)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\views.py", line 480, in raise_uncaught_exception      
    raise exc
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\mixins.py", line 82, in partial_update
    return self.update(request, *args, **kwargs)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\mixins.py", line 67, in update
    serializer.is_valid(raise_exception=True)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\serializers.py", line 220, in is_valid
    self._validated_data = self.run_validation(self.initial_data)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\serializers.py", line 419, in run_validation
    value = self.to_internal_value(data)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\serializers.py", line 476, in to_internal_value       
    validated_value = field.run_validation(primitive_value)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\fields.py", line 799, in run_validation
    return super().run_validation(data)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\fields.py", line 569, in run_validation
    self.run_validators(value)
  File "C:\Users\arauf\AppData\Local\Programs\Python\Python36\lib\site-packages\rest_framework\fields.py", line 587, in run_validators
    validator.set_context(self)
  File "C:\Users\arauf\Desktop\innerzone\NewCode\InnerZone-Backend\core\utils.py", line 213, in set_context
    super().set_context(serializer_field)
AttributeError: 'super' object has no attribute 'set_context'

Answer 1

您似乎也升级了 Django Rest Framework，但是在 Django Rest Frameworks GitHub 页面上， set_context方法不存在。 所以你的错误告诉你，父类UniqueValidator上的方法set_context不存在。

在此处查看他们的 GitHub 页面。