Django REST Framework - 可以进行多重嵌套序列化吗？

Question

我想做如下的事情：

models.py

class Container(models.Model):
    size  = models.CharField(max_length=20)
    shape = models.CharField(max_length=20)

class Item(models.Model):
    container = models.ForeignKey(Container)
    name  = models.CharField(max_length=20)
    color = models.CharField(max_length=20)

class ItemSetting(models.Model):
    item = models.ForeignKey(Item)
    attribute_one = models.CharField(max_length=20)
    attribute_two = models.CharField(max_length=20)

serializers.py

class ItemSettingSerializer(serializers.ModelSerializer):
    class Meta:
        model = ItemSetting


class ItemSerializer(serializers.ModelSerializer):
    settings = ItemSettingSerializer(many=True)

    class Meta:
        model = Item
        fields = ('name', 'color', 'settings')


class ContainerSerializer(serializers.ModelSerializer):
    items = ItemSerializer(many=True)

    class Meta:
        model = Container
        fields = ('size', 'shape', 'items')

当我只嵌套一层（容器和项目）时，它对我有用。但是当我尝试使用 ItemSetting 添加另一个级别的嵌套时，它会抛出 AttributeError 并抱怨 'Item' object has no attribute 'settings'

我做错了什么？

Answer 1

多重嵌套序列化对我有用。唯一的主要区别是我为 FK 关系指定了一个 related_name。所以尝试这样做：

class Item(models.Model):
    container = models.ForeignKey(Container, related_name='items')

class ItemSetting(models.Model):
    item = models.ForeignKey(Item, related_name='settings')

希望这对你有用。