Python 将URL参数传递给嵌套序列化程序

我有两个序列化程序，其中一个是嵌套的：

class PaperSerializer(serializers.ModelSerializer):

    class Meta:
        model = Paper


class AuthorSerializer(serializers.ModelSerializer):
    papers = PaperSerializer(
        many=True,
        read_only=True,
        source='paper_set'
    )

    class Meta:
        model = Author

我想获得一个作者列表，其中只显示他们发表的论文（模型上存在布尔字段）

---

我想调用API，比如

/API/v1/authors/？show\u published\u only=true

经过深入研究，我发现可以将上下文从视图集传递到序列化程序：

视图.py

class AuthorViewSet(viewsets.ModelViewSet):
    queryset = Author.objects.all()
    serializer_class = AuthorSerializer
    filter_fields = (
        'show_published_only',
    )

    def get_serializer_context(self):
        return {'request': self.request}

class FilteredPaperSerializer(serializers.ListSerializer):
    def to_representation(self, data):
        # Get the parameter from the URL
        show_published_only = self.context['request'].query_params['show_published_only']

        data = data.filter(is_published=show_published_only)
        return super(FilteredPaperSerializer, self).to_representation(data)

class AuthorSerializer(serializers.ModelSerializer):
    papers = FilteredPaperSerializer(
        many=True,
        read_only=True,
        source='paper_set'
    )

    class Meta:
        model = Author

现在，创建一个新的序列化程序

FilteredPaperSerializer

，该序列化程序继承自

serializers.ListSerializer

，然后重写

to_representation（）

方法以过滤查询集：

序列化程序.py

class AuthorViewSet(viewsets.ModelViewSet):
    queryset = Author.objects.all()
    serializer_class = AuthorSerializer
    filter_fields = (
        'show_published_only',
    )

    def get_serializer_context(self):
        return {'request': self.request}

class FilteredPaperSerializer(serializers.ListSerializer):
    def to_representation(self, data):
        # Get the parameter from the URL
        show_published_only = self.context['request'].query_params['show_published_only']

        data = data.filter(is_published=show_published_only)
        return super(FilteredPaperSerializer, self).to_representation(data)

class AuthorSerializer(serializers.ModelSerializer):
    papers = FilteredPaperSerializer(
        many=True,
        read_only=True,
        source='paper_set'
    )

    class Meta:
        model = Author

NB:别忘了将获取的URL参数转换为模型的布尔值或相关数据类型，我在上面的总结中忽略了这一点