handling_code_try_except.py

# Bad
class LembagaViewByNama(RetrieveAPIView):

    permission_classes = (IsAuthenticated, )
    authentication_class = JSONWebTokenAuthentication

    def get(self, request, nama_lembaga):
        nama = Lembaga.objects.get(nama_lembaga=nama_lembaga)
        if nama != None: # jika semakin banyak conditional maka akan semakin sulit
            serializer = LembagaSerializer(nama, context=serializer_context)
            response = {
                'success': 'true',
                'message': 'Lembaga {} fetched successfully'.format(nama.get_nama()),
                'data': serializer.data
            }
            return Response(response, status=status.HTTP_200_OK)
        else:
            response = {
                'message': 'Lembaga does not exist',
            }
            return Response(response, status=status.HTTP_404_NOT_FOUND)


# Good
class LembagaViewByNama(RetrieveAPIView):

    permission_classes = (IsAuthenticated, )
    authentication_class = JSONWebTokenAuthentication

    def get(self, request, nama_lembaga):
        try:
            nama = Lembaga.objects.get(nama_lembaga=nama_lembaga)
            serializer = LembagaSerializer(nama, context=serializer_context)
            response = {
                'success': 'true',
                'message': 'Lembaga {} fetched successfully'.format(nama.get_nama()),
                'data': serializer.data
            }
            return Response(response, status=status.HTTP_200_OK)
        except Lembaga.DoesNotExist:
            response = {
                'message': 'Lembaga does not exist',
            }
            return Response(response, status=status.HTTP_404_NOT_FOUND)