Django REST Framework-可以进行多重嵌套序列化吗? [英] Django REST Framework -- is multiple nested serialization possible?

问题描述

我想做以下事情:

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')

当我只嵌套一个级别(容器和项目)时，它对我有用.但是，当我尝试使用ItemSetting添加另一层嵌套时，它抛出 AttributeError 并抱怨'Item'对象没有属性'settings'

When I do nesting of only one level (Container and Item) it works for me. But when I try to add another level of nesting with the ItemSetting, it throws an AttributeError and complains 'Item' object has no attribute 'settings'

我在做什么错了?

推荐答案

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 related_name .因此，尝试这样做:

Multiple nested serialization works for me. The only major difference is that I specify a related_name for the FK relationships. So try doing this:

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

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

希望这对您有用.

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