How do I properly deserialize data with django-money? - django

Question

I have Model that contains MoneyField from djmoney
class Task(models.Model):
description = models.CharField(max_length=512)
user = models.ForeignKey("user.User", on_delete=models.CASCADE)
price = MoneyField(
max_digits=8,
decimal_places=2,
default_currency="USD",
default=0)
Serializer
class TaskSerializer(serializers.ModelSerializer):
class Meta:
model = Task
fields = "__all__"
read_only_fields = ("user",)
My APIView POST function of Viewset
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
self.perform_create(serializer)
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=201, headers=headers)
def perform_create(self, serializer):
serializer.save(user=self.request.user)
When I'm trying to POST data in format like this
{
"description": "Test",
"price": "20.00"
}
It gives me an error, that
'decimal.Decimal' object has no attribute 'amount' with given Traceback.
How can I solve this issue?
Traceback (most recent call last):
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
return view_func(*args, **kwargs)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/viewsets.py", line 125, in view
return self.dispatch(request, *args, **kwargs)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/views.py", line 509, in dispatch
response = self.handle_exception(exc)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/views.py", line 469, in handle_exception
self.raise_uncaught_exception(exc)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
raise exc
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/views.py", line 506, in dispatch
response = handler(request, *args, **kwargs)
File "/home/user/PycharmProjects/my_project/tackapp/tack/views.py", line 37, in create
serializer.is_valid(raise_exception=True)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/serializers.py", line 227, in is_valid
self._validated_data = self.run_validation(self.initial_data)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/serializers.py", line 426, in run_validation
value = self.to_internal_value(data)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/serializers.py", line 483, in to_internal_value
validated_value = field.run_validation(primitive_value)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/fields.py", line 569, in run_validation
self.run_validators(value)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/rest_framework/fields.py", line 593, in run_validators
validator(value)
File "/home/user/.virtualenvs/my_project/lib/python3.10/site-packages/djmoney/models/validators.py", line 30, in __call__
cleaned = cleaned.amount
I did found workaround like this but I'm trying to get my code clean and simple. And I think that I am missing something.
So basically serializer expects value in Money object, but did not expect str from it's own serializer methods
def create(self, request, *args, **kwargs):
price = Money(request.data["price"], "USD")
serializer = self.get_serializer(data=request.data | {"price": price})
...