Django rest嵌套子序列化器（具有反向关系）列表创建

Question

我是 django rest 的新手，目前正在使用序列化程序来处理对象的嵌套创建 ModelB是要创建其实例的对象，它与modelC有反向关系，与modelA有直接关系

ModelA 在创建期间必须获取并传递给 ModelB ModelC 列表将与 ModelB 一起创建

型号

class ModelA(TimeStampMixin, CoordinateMixin):
    name = models.CharField(max_length=150)


class ModelB(TimeStampMixin):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
    modelA = models.ForeignKey(
        ModelA,
        on_delete=models.PROTECT,
        related_name='modela_reverse'
    )



class ModelC(TimeStampMixin):
    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
    modelB = models.ForeignKey(ModelB, on_delete=models.CASCADE, related_name='modelb_reverse')
    modelD = models.ForeignKey(ModelD, on_delete=models.CASCADE, related_name='modelD_reverse')
    
class ModelD(TimeStampMixin):

    uuid = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
    name = models.CharField(max_length=50)

序列化器：

class ModelDSerializer(serializers.ModelSerializer):
 
    class Meta:
        model = ModelD
        fields = ['name', 'uuid']
 

class ModelCSerializer(serializers.ModelSerializer):
    modeld = ModelDSerializer(many=False)

    class Meta:
        model = ModelC
        fields = ['modeld', 'quantity']


class ModelA(serializers.ModelSerializer):
    class Meta:
        model = ModelA
        fields = ['name', 'uuid']
        read_only_fields = ['name']

    def to_internal_value(self, data):
        modelA = ModelA.objects.get(**data)
        return modelA


class ModelB(serializers.ModelSerializer):    
     modelb_reverse = ModelCSerializer(many=True)
     modelA = ModelASerializer(many=False)

    class Meta:
        model = ModelB
        fields = ['modelb_reverse', 'modelA']
    

到目前为止，当仅包含嵌套 modelA 时，我已经能够通过其序列化程序创建 ModelB，但我坚持以某种方式修改解决方案以包括通过嵌套 ModelCSerializer 创建反向对象

我正在寻找一种优雅的方式来实现这一点，并且已经在这里停留了一段时间 非常感谢一些帮助 提前致谢

Answer 1

您可以覆盖 ModelB 序列化程序的 create 方法来创建反向对象。检查一下：https://www.django-rest-framework.org/api-guide/relations/#writable-nested-serializers