我是Django和Rest Framework的新手。所以我相信你们可以帮助我在这里解决我的问题。我使用的是python 2.7和Django 1.11。
我的模特-
class Item(models.Model):
title = models.CharField(max_length=140)
user = models.ForeignKey(User)
created_date = models.DateTimeField(auto_now_add=True)
due_date = models.DateTimeField(blank=True, null=True)
completed = models.BooleanField()
completed_date = models.DateTimeField(blank=True, null=True)
def save(self,force_insert=False, force_update=False):
i = datetime.datetime.now(pytz.utc)
in_tz = pytz.timezone("Asia/Calcutta")
i = i.astimezone(in_tz)
# If Item is being marked complete, set the completed_date
if self.completed:
self.completed_date = i
super(Item, self).save(force_insert, force_update)
class User(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(unique=True)
first_name = models.CharField(max_length=30, null=True, blank=True)
last_name = models.CharField(max_length=30, null=True, blank=True)
... ... ...
我正在尝试将记录发布到Item模型,该模型应该从请求标头中获取用户电子邮件,并应该为该特定记录创建外键关系。
我的Item模型的序列化器-
class ItemSerializer(serializers.ModelSerializer):
user = serializers.RelatedField(source='User',read_only=True)
class Meta:
model = Item
fields = '__all__'
我的商品模型视图集-
class ItemViewset(viewsets.ModelViewSet):
serializer_class = ItemSerializer
queryset = Item.objects.all()
def perform_create(self, serializer):
print 'Im in here', self.request.user
user_id = User.objects.get(email=self.request.user)
serializer.save(user= user_id)
我已经检查了一些关于StackOverflow的博客和其他问题,并且到现在为止。
现在,当我尝试发布记录时,出现如下所示的TypeError
Got a `TypeError` when calling `Item.objects.create()`.
This may be because you have a writable field on the serializer class that is not a valid argument to `Item.objects.create()`.
You may need to make the field read-only, or override the ItemSerializer.create() method to handle this correctly.
Original exception was:
Traceback (most recent call last):
File "/../env/local/lib/python2.7/site-packages/rest_framework/serializers.py", line 943, in create
instance = ModelClass._default_manager.create(**validated_data)
File "/../env/local/lib/python2.7/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/../env/local/lib/python2.7/site-packages/django/db/models/query.py", line 394, in create
obj.save(force_insert=True, using=self.db)
TypeError: save() got an unexpected keyword argument 'force_insert'
请帮助我解决我的用例。我没有时间完成这项工作。
非常感谢。
答案 0 :(得分:1)
我认为您不需要覆盖perform_create
。您所需要做的就是更改序列化器的create
方法:
class ItemSerializer(serializers.ModelSerializer):
class Meta:
model = Item
fields = '__all__'
read_only_fields = ('user')
def create(self, validated_data):
validated_data['user'] = self.context["request"].user
return super(ItemSerializer, self).create(validated_data)
这里,您应该能够在序列化器中获取请求对象,因为ViewSet通过extra context
发送了request
对象。我只是将user
对象从序列化器添加到validated_data
中。我还摆脱了user
字段,而是将其添加到read_only_fields
。