Django Rest Framework error: {"user":["This field is required."] - django

Question

When posting this:
curl -X POST -H "Authorization: Token sometoken" -d "url=someurl" 127.0.0.1:8000/create/
I get the error:
{"user":["This field is required."] with the ItemSerializer,
I have seen other posts on SO talking about using perform_create, which I am trying to use to save the user object, but it doesn´t work for some reason. Perform_create works when user is defined like this:
user = serializers.CharField(
default=serializers.CurrentUserDefault()
)
But I want to use the user object, not only CharField storing the username
Serializers:
class UserDetailsSerializer(serializers.ModelSerializer):
class Meta:
model = UserModel
fields = ('pk', 'username', 'email', 'first_name', 'last_name')
read_only_fields = ('email', )
class CategorySerializer(serializers.ModelSerializer):
class Meta:
model = Category
fields = ['cat']
class CommentSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = Comment
fields = [
'comment',
]
class ItemSerializer(serializers.HyperlinkedModelSerializer):
user = UserDetailsSerializer()
category = CategorySerializer(many=True)
thecomments = CommentSerializer(many=True)
timestamp = serializers.SerializerMethodField('get_mytimestamp')
def get_mytimestamp(self, obj):
return time.mktime(datetime.datetime.now().timetuple())
class Meta:
model = Item
fields = [
"url",
"user",
"timestamp",
"categories",
"thecomments",
]
Model:
class Item(models.Model):
url = models.CharField(max_length=1000)
user = models.ForeignKey('auth.User', unique=False)
timestamp = models.DateTimeField(auto_now_add=True)
url = models.CharField(max_length=1000)
categories = models.ManyToManyField(Category)
View:
class ItemCreateAPIView(generics.CreateAPIView):
serializer_class = ItemSerializer
def perform_create(self, serializer):
serializer.save(user=self.request.user)
Solution:
Serializer to create Item:
class CreateSerializer(serializers.HyperlinkedModelSerializer):
timestamp = serializers.SerializerMethodField('get_mytimestamp')
def get_mytimestamp(self, obj):
return time.mktime(datetime.datetime.now().timetuple())
class Meta:
model = Item
fields = [
"url",
"timestamp",
]
views.py
class ItemCreateAPIView(generics.CreateAPIView):
serializer_class = CreateSerializer
def perform_create(self, serializer):
serializer.save(user=self.request.user)
post:
curl -X POST -H "Authorization: Token sometoken" -d "url='someurl'" 127.0.0.1:8000/createitem/

Answer 1

class ItemSerializer(serializers.HyperlinkedModelSerializer):
user = UserDetailsSerializer()
category = CategorySerializer(many=True)
thecomments = CommentSerializer(many=True)
timestamp = serializers.SerializerMethodField('get_mytimestamp')
def get_mytimestamp(self, obj):
return time.mktime(datetime.datetime.now().timetuple())
class Meta:
model = Item
fields = [
"url",
"user",
"timestamp",
"categories",
"thecomments",
]
extra_kwargs = {'user': {'required': False}}
add extra_kwargs = {'user': {'required': False}} to your serializer Meta

Answer 2

i had the same issue.
added extra_kwargs = {'user': {'required': False}} to serializer Meta class and it worked