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virvaldium
Asked:2020-09-13 22:38:33 +0000 UTC2020-09-13 22:38:33 +0000 UTC

在 DRF 中禁用映射

  • 772

你好！我有一个视图模型：

class MyModels(models.Model):
    name = CharhField(max_lenght=100)
    address = CharField(max_lenght=100)

我有一个这样的序列化程序：

class MySerializer(ModelSerializer):
      class Meta:
          model = MyModel
          fields = ('name', 'address', 'code')

      name = CharhField(max_lenght=100)
      address = CharField(max_lenght=100)
      code = CharField(max_lenght=100)

也就是说，我的序列化程序包含一个附加字段。因此，事实证明“设置”：

class MyViewSet(CreateModelMixin, ListModelMixin):
    http_method_names = ['post']
    queryset = MyModels.objects
    serializer_class = UserSerializer

保存结果时，它会因以下错误而崩溃：

AttributeError: Got AttributeError when attempting to get a value for field `code` on serializer `MySerializer`.
app_1       | The serializer field might be named incorrectly and not match any attribute or key on the `MyModel` instance.
app_1       | Original exception text was: 'MyModel' object has no attribute 'code'.

此错误发生在生成 MyViewSet 的 Respone 中。请告诉我，是否有可能以某种方式从验证数据中删除此“代码”？

python

1 个回答

  1. Best Answer

    您可以指定一个不在模型中的字段write_only=True以避免此错误。并重载create.

    class MySerializer(ModelSerializer):
    code = CharField(max_lenght=100, write_only=True)
    # поля address и name не нужно дублировать в теле сериалайзера

    class Meta:
        model = MyModel
        fields = ('name', 'address', 'code')

    def create(self, validated_data):
        code = validated_data.pop('code')
        # Проводите нужные операции с полем `code`
        return super(MySerializer, self).create(validated_data)
    • 1

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