Django REST 错误：TypeError: int() 参数必须是字符串、类似字节的对象或数字，而不是“BoundField”

Question

I have a function which outputs Friday by taking in week number as a parameter

def fridayOfWeek(p_week):
    p_year=2021
    monday = datetime.datetime.strptime(f'{p_year}-W{int(p_week )- 1}-1', "%Y-W%W-%w").date()
    wednesday = monday + datetime.timedelta(days=2)
    friday  = monday + datetime.timedelta(days=6.9) - datetime.timedelta(days=2)
    return friday

but when I serializer data and Set

serialize = ExamSimulatorSerializer(request.data)
date = fridayOfWeek(serializer["week"])

it gives me an error

   
      File "C:\Users\user1\Desktop\backend\data_manager\views.py", line 43, in examSimulator
        date = fridayOfWeek(m['week'])
      File "C:\Users\user1\Desktop\backend\week_into_date.py", line 10, in fridayOfWeek
        monday = datetime.datetime.strptime(f'{p_year}-W{int(p_week )- 1}-1', "%Y-W%W-%w").date()
    
    Exception Type: TypeError at /api/exam-simulator/
    Exception Value: int() argument must be a string, a bytes-like object or a number, not 'BoundField'

my serializer class is:

class ExamSimulatorSerializer(serializers.Serializer):
    week = serializers.IntegerField() 
    subject = serializers.CharField()
    code = serializers.CharField()
    
    def create(self, validated_data):
        pass

my views.py

@api_view(['POST'])
@parser_classes([JSONParser])
def examSimulator(request):
    m = ExamSimulatorSerializer(request.data)
    code = m['code']
    date = fridayOfWeek(m['week'])
    subject = Subject.objects.get(name = m['subject'])
    for s in subject.students.all().values():
        student = Student.objects.get(roll_num=s['roll_num'])
        score = random.randint(25,95)
        Exam.objects.create(code=code, date=date, student=student, subject=subject,score=score)
        return Response(status=status.HTTP_200_OK)        

Moreover Is this the right way to make a model-less serializer class

Answer 1

you will be able to access the serializer data inside serializer.data["week"] instead of serializer["week"]

also note you have a small typo on the serializer variable, try this:

serializer = ExamSimulatorSerializer(request.data)
date = fridayOfWeek(serializer.data["week"])

or even:

serializer = ExamSimulatorSerializer(data=request.data)
serializer.is_valid(raise_exception=True)
date = fridayOfWeek(serializer.validated_data["week"])

if you want to validate your data and raise an exception in case the serializer is not valid