2
根据Django REST Framework版本3 documentation,为了创建可写入嵌套序列化器,您需要编写自己的create()
和update()
方法。我有阅读和写作的工作,但更新不起作用。例如,如果我将以下数据发送到我的序列化器3次,我最终创建了3个新的Widget。我预计传递一个预先存在的id
会触发更新并呼叫update()
,但是会调用create()
。似乎id
被忽略,这是有道理的,因为它是自动生成的,所以我如何实现这一点?Django REST Framework嵌套序列化器不会更新
我有一种感觉,我错过了一些明显的东西,也许在我看来有些额外的处理?
views.py(目前确实粗糙,请原谅)
from rest_framework.decorators import api_view
from rest_framework.response import Response
from widget.models import Widget
from widget.serializers import WidgetSerializer
@api_view()
def create(request):
data = {
"id": 4,
"widget_alpha": {
"bits": [
{
"id": 3,
"name": "bit 1",
"widget": 4
}
],
"bobs": [
{
"id": 3,
"name": "bob 1",
"widget": 4
}
],
"name": "my wid",
"widget": 4
},
"language": "en",
"code": "123"
}
serializer = WidgetSerializer(data=data)
if serializer.is_valid():
serializer.save()
else:
print serializer.errors
return Response({"message": "yay"})
Widget是一个父模型,WidgetAlpha是一个孩子,是由几个位和鲍勃的。下面的代码相关的models.py
和serializers.py
。
models.py
from django.db import models
class Widget(models.Model):
LANGUAGE = (
('fr', 'French'),
('en', 'English'),
)
language = models.CharField(max_length=2, choices=LANGUAGE)
code = models.CharField(max_length=6)
class WidgetAlpha(models.Model):
widget = models.OneToOneField(Widget, primary_key=True, related_name='widget_alpha')
name = models.CharField(max_length=6)
class Bit(models.Model):
widget = models.ForeignKey(WidgetAlpha, related_name='bits')
name = models.CharField(max_length=6)
class Bob(models.Model):
widget = models.ForeignKey(WidgetAlpha, related_name='bobs')
name = models.CharField(max_length=6)
serializers.py
from rest_framework import serializers
from widget.models import Widget, WidgetAlpha, Bit, Bob
class BitsSerializer(serializers.ModelSerializer):
class Meta:
model = Bit
class BobsSerializer(serializers.ModelSerializer):
class Meta:
model = Bob
class WidgetAlphaSerializer(serializers.ModelSerializer):
bits = BitsSerializer(many=True)
bobs = BobsSerializer(many=True)
class Meta:
model = WidgetAlpha
class WidgetSerializer(serializers.ModelSerializer):
widget_alpha = WidgetAlphaSerializer()
class Meta:
model = Widget
def create(self, validated_data):
widget_alpha_data = validated_data.pop('widget_alpha')
bits_data = widget_alpha_data.pop('bits')
bobs_data = widget_alpha_data.pop('bobs')
widget = Widget.objects.create(**validated_data)
alpha_widget = WidgetAlpha.objects.create(widget=widget, **widget_alpha_data)
for bit_data in bits_data:
Bit.objects.create(widget=alpha_widget, **bit_data)
for bob_data in bobs_data:
Bob.objects.create(widget=alpha_widget, **bob_data)
return widget
def update(self, instance, validated_data):
# never get here :(
return instance
你可以添加你的看法呢? – DevilPinky
views.py已被添加 – redgoose
你不要在任何地方调用'update'。如果你想调用一个更新,你需要创建类似如下的串行器对象:'serializer = WidgetSerializer(object,data = data)' – DevilPinky