How can we achieve this?

[Puneet Makhija]

def decorator(func):
    @wraps(func)
    def inner(request, *args, **kwargs):
        pdb.set_trace()
        a1 = args
        user = a1[1]._request.user
        permission = Permission.objects.get(user=user)
        # < Permission: bookings | Booking | Can view Booking >
        return func(*args, **kwargs)
    return inner

class OfferListAPIView(generics.ListCreateAPIView):
    queryset = Offers.objects.all().order_by('-id')
    serializer = OfferListSerializer
    def list(self, request):
        queryset = self.get_queryset()
        serializer = OfferListSerializer(queryset, many=True)
        return response_handler(data=serializer.data, message="All offer list fetched.")


The requested user have a permissions to view only booking , and the class is mainly for Offer List API , how can I map this and display 
an error you dont have permission to access this. , I am working with Angular and Django . please help me