Traceback (most recent call last):
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/viewsets.py", line 125, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/home/alexey/PycharmProjects/foodshop/carts/views.py", line 27, in create
    item_id=cart_item.data['item'],
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/serializers.py", line 548, in data
    ret = super().data
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/serializers.py", line 248, in data
    self._data = self.to_representation(self.validated_data)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/serializers.py", line 515, in to_representation
    ret[field.field_name] = field.to_representation(attribute)
  File "/home/alexey/.local/share/virtualenvs/foodshop-QwrKxyjA/lib/python3.8/site-packages/rest_framework/fields.py", line 1870, in to_representation
    return method(value)
  File "/home/alexey/PycharmProjects/foodshop/carts/serializers.py", line 22, in get_total_price
    return obj['quantity'].quantity * obj.price
AttributeError: 'int' object has no attribute 'quantity'