Django 序列化器模型 LeftJoin

Question

嗨，我是 Django 新手，希望有人能帮我解决我的小问题^^

我有这样的模型：

class Article(model.Model):
   name = model.CharField(max_length=100)
   ...

class Stock(model.Model):
   article = models.ForeignKey(Article, on_delete=models.CASCADE, null=True)
   quantity = model.IntegerField(max_digits=10, default=1)
   quality = models.CharField(max_length=15, choices=[(tag.value, tag.value) for tag in States])
   ...

我想获得所有文章的列表，其中包含所有股票，如

[{
  name: 'Bla',
  stock: [{
      quantity: 22,
      quality: 'good',
  }]
}]

我有一个观点：

class ArticleListView(ListAPIView):
  queryset = Article.objects.all()???
  serializer_class = ArticleStockSerializer
  permission_classes = (IsAuthenticated, HasAccess)

但我不知道如何使用它

还有一个像这样的序列化器：

class ArticleStockSerializer(ArticleSerializer):
    stock = serializers.SerializerMethodField()

    def get_stock(self, obj):

        stock = StockSerializer()
        return stock

    class Meta(ArticleSerializer.Meta):
        model = Article
        fields = ArticleSerializer.Meta.fields + ('stock',)

不工作，我找不到正确的使用方法。

希望有人可以帮助我:)

感谢和问候

xQp

Answer 1

你应该试试Serializer Nested relationships

class StockSerializer(serializers.ModelSerializer):
    class Meta:
        model = Stock
        fields = ('quantity', 'quality',)


class ArticleStockSerializer(ArticleSerializer):
    stocks = StockSerializer(many=True, read_only=True)

    class Meta(ArticleSerializer.Meta):
        model = Album
        fields = ArticleSerializer.Meta.fields + ('stocks',)