Question

您好，我是Django的新手，我希望有人可以为我的小问题提供帮助^^

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])
   ...

我想获得所有类似股票的所有文章列表

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

我有一个视图：

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

但是我不确定如何使用

和类似的序列化器：

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',)

无法正常工作，我找不到正确的使用方式。

希望有人可以帮助我：）

致谢

xQp

Answer 1

您应该尝试使用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',)

Django序列化器模型LeftJoin

1 个答案: