嵌套字段序列化程序 - 数据丢失 [英] Nested field serializer - Data missing
问题描述
我不能遵循所附主题的答案,因为序列化后缺少 ID 。
- 模型。 py
- Model.py
class Owner(models.Model):
name = models.CharField(db_index=True, max_length=200)
class Car(models.Model):
name = models.CharField(db_index=True, max_length=200)
LCVS = models.ForeignKey(Owner)
- View.py
- View.py
class OwnerViewSet(viewsets.ModelViewSet):
queryset = Owner.objects.all()
serializer_class = OwnerSerializer
class CarViewSet(viewsets.ModelViewSet):
serializer_class = CarSerializer
queryset = Car.objects.all()
- Serializer.py
- Serializer.py
/ p>
class OwnerSerializer(serializers.ModelSerializer):
class Meta:
model = Owner
fields = ('id', 'name')
class CarSerializer(serializers.ModelSerializer):
owner = OwnerSerializer()
class Meta:
model = Car
fields = ('id', 'name', 'owner')
def create(self, validated_data):
tmp_owner = Owner.objects.get(id=validated_data["car"]["id"])
car = Car.objects.create(name=self.data['name'],owner=tmp_owner)
return car
现在我发送以下请求:
Now i send the following request :
Request URL:http://localhost:9000/api/v1/cars
Request Method:POST
Request Paylod :
{
"name": "Car_test",
"ower": {
"id":1,
"name": "Owner_test"
}
}
但是,这里validated_data不包含所有者ID!
But, here the validated_data don't contain the owner ID !
追溯| local vars
Traceback | Local vars
validated_data {u'Owner': OrderedDict([(u'name', u'Owner_test')]), u'name': u'Car_test'}
@凯文布朗:
工作!感谢
我会验证你的答案,但我得到一个新的问题...
@Kevin Brown :
Workful ! Thanks
I'll validate your answer but I get a new problem...
现在,当我尝试放置一个新的所有者,一个错误提高: / p>
Now when I try to put a new Owner, an error raise :
{
"id": [
"This field is required."
]
}
我不得不创建一个新的序列化程序?
I had to create a new serializer ?
推荐答案
您的模型中的任何 AutoField
(这是自动生成的<$当Django REST Framework在后台创建字段时,默认情况下,c $ c> id key is)设置为只读。您可以通过执行
Any AutoField
s on your model (which is what the automatically generated id
key is) are set to read-only by default when Django REST Framework is creating fields in the background. You can confirm this by doing
repr(CarSerializer())
并看到使用 read_only = True生成的字段设置。您可以使用
> extra_kwargs
Meta选项,它将允许您覆盖它并设置 read_only = False
。
and seeing the field generated with read_only=True
set. You can override this with the extra_kwargs
Meta option which will allow you to override it and set read_only=False
.
class OwnerSerializer(serializers.ModelSerializer):
class Meta:
model = Owner
fields = ('id', 'name')
extra_kwargs = {
"id": {
"read_only": False,
"required": False,
},
}
这将包括 id
validated_data
中的字段。
这篇关于嵌套字段序列化程序 - 数据丢失的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!