def formfield_for_dbfield(self, db_field, **kwargs):
formfield = super(RelatedWidgetWrapperBase, self).formfield_for_dbfield(db_field, **kwargs)
if (formfield and
isinstance(formfield.widget, admin.widgets.RelatedFieldWidgetWrapper) and
not isinstance(formfield.widget.widget, SelectMultiple)):
request = kwargs.pop('request', None)
related_modeladmin = self.admin_site._registry.get(db_field.rel.to)
can_change_related = bool(related_modeladmin and
related_modeladmin.has_change_permission(request))
can_delete_related = bool(related_modeladmin and
related_modeladmin.has_delete_permission(request))
widget = RelatedFieldWidgetWrapper.from_contrib_wrapper(formfield.widget,
can_change_related,
can_delete_related)
formfield.widget = widget
return formfield
