def file_view(self, request, field_entry_id):
        """
        Output the file for the requested field entry.
        """
        model = self.fieldentry_model
        field_entry = get_object_or_404(model, id=field_entry_id)
        path = join(fs.location, field_entry.value)
        response = HttpResponse(content_type=guess_type(path)[0])
        f = open(path, "r+b")
        response["Content-Disposition"] = f.name % "attachment; filename=%s"
        response.write(f.read())
        f.close()
        return response
dataset/ETHPy150Open stephenmcd/django-forms-builder/forms_builder/forms/admin.py/FormAdmin.file_view/swapped operands of `%`