Django models default error messages into one field - django

Question

This very simple django restframework code.
models.py
class User(models.Model)
Email = models.CharField(max_length=100)
Username = models.CharField(max_length=100)
State = models.CharField(max_length=100)
serializers.py
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('Email','Username','State')
views.py
class UserList(generics.ListCreateAPIView):
queryset = User.objects.all()
serializer_class = UserSerializer
If use this I am getting error out put like this
{
"Email": [
"This field may not be blank."
],
"Username": [
"This field may not be blank."
],
"Country": [
"This field may not be blank."
],
}
But I need to change the error out like this.How I can i archive this and any suggestion greatly appreciated.
{"error":
[
"Email is required",
"Username is required",
"County is required"
]
}

Answer 1

You can always overwrite the create/update methods from the generic views. It would be something like:
class UserList(generics.ListCreateAPIView):
queryset = User.objects.all()
serializer_class = UserSerializer
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data)
if not serializer.is_valid(raise_exception=False):
# TODO: add here your custom error dict using serializer.errors
return Response({"error":...}, status=...)
self.perform_create(serializer)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
Or... you could try to overwrite the serializers... if you don't want to overwrite the view.
(However, there must be a good reason for a JS developer not being able to parse a simple json error object :P)
Hope this helps

Answer 2

You can define your own error messages for any error case:
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('Email','Username','State')
def __init__(self, *args, **kwargs):
super(UserSerializer, self).__init__(*args, **kwargs)
for field in self.Meta.fields:
self.fields[field].error_messages['required'] = "%s is required" % field