Django REST PATCH request field is required problem

Question

I have a Student model. And I want to update some specific fields. But when I go to update one or two fields but the other field value is as it is then which fields are not changing those fields show this error** "This field is required.". **

Here is my model.

class Student(models.Model):
    teacher=models.ForeignKey(Teacher, on_delete=models.CASCADE)
    name=models.CharField(max_length=20)
    level=models.CharField(max_length=20)

And here are my views

class StudentUpdateDelete(APIView): 
    def patch(self, request, id):
        student=Student.objects.filter(pk=id).first()
        serializer=StudentSerializer(student, data=request.data)

        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

Above model has 3 fields, but I want to change only the name field using the patch method.

here is postman request image

Answer 1

If you want to update specific field with the PATCH method, set partial=True when you are initializing the serializer.

So, for your view it would be:

class StudentUpdateDelete(APIView): 
    def patch(self, request, id):
        student=Student.objects.filter(pk=id).first()
        serializer=StudentSerializer(student, data=request.data, partial=True)

        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)