# Limit the location selection if required.

        location_id = self.request.GET.get("location", None)

        if location_id:

            form.fields["location"].queryset = Location.objects.filter(pk=location_id)

            form.fields["location"].widget.attrs["readonly"] = True

        return form

    def get_initial(self):

        """

        Returns initial values that should be pre-selected (if they were

        specified through a GET parameter).

    permissions = {

        "all": ("conntrackt.change_entity",),

        }

    # Raise authorisation denied exception for unmet permissions.

    raise_exception = True

class EntityDeleteView(MultiplePermissionsRequiredMixin, DeleteView):

    """

    View for deleting an entity.

    """

        @TODO: Fix this once Django 1.6 comes out with fix from ticket 19044.

        """

        self.success_url = reverse("entity", args=(self.get_object().entity.id,))

        return super(InterfaceDeleteView, self).delete(*args, **kwargs)