Python django rest farmework嵌套关系以使用筛选器

使用django rest farmework实现API，有一个问题一直无法解决：如何过滤关联表？具体代码如下：

models.py

class Category(models.Model):
    name = models.CharField(max_length=30)
    amount = models.IntegerField()

class Source(models.Model):
    name = models.CharField(max_length=50)
    rss_link = models.URLField()
    amount = models.IntegerField()
    # ForeignKey
    category = models.ForeignKey(Category)

views.py

class CategoryListView(APIView):
    def get(self, request):
        category = Category.objects.all()
        serializers = CategorySerializers(category, many=True)
        return Response(serializers.data)

序列化程序.py

class SourceSerializers(serializers.ModelSerializer):
    class Meta:
        model = Source
        fields = ("id","name","amount")

class CategorySerializers(serializers.ModelSerializer):
    source_set = SourceSerializers(many=True, read_only=True)

    class Meta:
        model = Category
        fields = ("id","name","amount","source")

class SourceSerializers(serializers.ModelSerializer):
    class Meta:
        model = Source
        fields = ("id","name","amount")

class CategorySerializers(serializers.ModelSerializer):

    #Modified the following code
    source_set = SourceSerializers(Source.objects.filter(amount=0),many=True, read_only=True)

    class Meta:
        model = Category
        fields = ("id","name","amount","source")

程序运行结果：

[
    {
        "id": 1,
        "name": "study",
        "amount": "0",
        "source": [
            {
                "id": 34,
                "name": "java",
                "amount": "0"
            },
            {
                "id": 35,
                "name": "python",
                "amount": "0"
            },
            {
                "id": 36,
                "name": "css",
                "amount": "2"
            }
        ]
    }
]

现在我只需要查询0数据“数量”的“来源”，我尝试编写以下代码：

序列化程序.py

class SourceSerializers(serializers.ModelSerializer):
    class Meta:
        model = Source
        fields = ("id","name","amount")

class CategorySerializers(serializers.ModelSerializer):
    source_set = SourceSerializers(many=True, read_only=True)

    class Meta:
        model = Category
        fields = ("id","name","amount","source")

class SourceSerializers(serializers.ModelSerializer):
    class Meta:
        model = Source
        fields = ("id","name","amount")

class CategorySerializers(serializers.ModelSerializer):

    #Modified the following code
    source_set = SourceSerializers(Source.objects.filter(amount=0),many=True, read_only=True)

    class Meta:
        model = Category
        fields = ("id","name","amount","source")

修改了以下代码：

source_set = SourceSerializers(many=True, read_only=True)

到

但结果是一样的，我希望结果是：

[
    {
        "id": 1,
        "name": "study",
        "amount": "0",
        "source": [
            {
                "id": 34,
                "name": "java",
                "amount": "0"
            },
            {
                "id": 35,
                "name": "python",
                "amount": "0"
            }
        ]
    }
]

---

提前感谢。

稍微更改一下序列化程序。可以使用SourceWithCategorySerializer序列化相关的类别对象。然后，您可以基于数量查询源对象，并将该查询集传递给序列化程序

你的看法：

class CategoryListView(APIView):
    def get(self, request):
        sources = Source.objects.filter(amount=0)
        serializers = SourceWithCategorySerializers(sources, many=True)
        return Response(serializers.data)

序列化程序：

class SourceWithCategorySerializers(serializers.ModelSerializer):
    category = CategorySerializer(read_only=True)

    class Meta:
        model = Source
        fields = ("id","name","amount", "category")

class CategorySerializers(serializers.ModelSerializer):
    class Meta:
        model = Category
        fields = ("id","name","amount")

---

稍微更改一下序列化程序。可以使用SourceWithCategorySerializer序列化相关的类别对象。然后，您可以基于数量查询源对象，并将该查询集传递给序列化程序

你的看法：

class CategoryListView(APIView):
    def get(self, request):
        sources = Source.objects.filter(amount=0)
        serializers = SourceWithCategorySerializers(sources, many=True)
        return Response(serializers.data)

序列化程序：

class SourceWithCategorySerializers(serializers.ModelSerializer):
    category = CategorySerializer(read_only=True)

    class Meta:
        model = Source
        fields = ("id","name","amount", "category")

class CategorySerializers(serializers.ModelSerializer):
    class Meta:
        model = Category
        fields = ("id","name","amount")

您可以使用：

我把你的班名的复数“s”去掉了，因为他们让我很痒；）

您可以使用：

---

我把你的班名的复数“s”去掉了，因为他们让我很痒；）

sources=category.source\u set.filter（amount=0）

，如果“amount”是参数，该参数来自“CategoryListView”，如何将其传递给“get\u sources”？

sources=category.source\u set.filter（amount=0）

，如果“amount”是参数，该参数来自“CategoryListView”，如何将其传递给“get\u sources” ?