在 Django Rest Framework 中动态修改序列化器字段

问题描述

我正在尝试使用 django rest 框架文档中描述的高级序列化程序用法.http://django-rest-framework.org/api-guide/serializers.html#advanced-serializer-usage 动态修改序列化器字段

I'm trying to use the Advanced serializer usage described in the django rest framework documentation. http://django-rest-framework.org/api-guide/serializers.html#advanced-serializer-usage to dynamically modifying serializer field

这是我的序列化程序类:

Here is my serializer class:

class MovieSerializer(serializers.ModelSerializer):
    moviework_work = MovieWorkSerializer(many=True) 

    def __init__(self, *args, **kwargs):
        # Don't pass the 'fields' arg up to the superclass
        dropfields = kwargs.pop('dropfields', None)

        # Instantiate the superclass normally
        super(MovieSerializer, self).__init__(*args, **kwargs)

        if dropfields:
            # Drop fields specified in the `fields` argument.
            banished = set(dropfields)
            for field_name in banished:
                self.fields.pop(field_name)
    class Meta:
        model = Movie
        fields = ('field1','field2','moviework_work')

这是我的观点

class MovieFromInterpreterViewSet(viewsets.ModelViewSet):
    queryset = Movie.objects.all()
    serializer_class = MovieSerializer(dropfields=('moviework_work',))

我收到此错误:

TypeError: 'MovieSerializer' object is not callable

推荐答案

请注意，您设置的 serializer_class 不是类，而是类的实例.您要么需要将 dropfields 设置为类的属性，(就像在您链接到的文档示例中为 fields 所做的那样)，或者您需要查看覆盖视图集的 get_serializer 方法(docs).

Note that you are setting serializer_class not to a class, but to an instance of the class. You either need to set dropfields as an attribute on the class, (just like it does for fields in the documented example you link to) or you need to look at overriding the get_serializer method of the viewset (docs).

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