“无法解析余数”错误

Question

我正在尝试检查特定组是否有权修改其他类型的组

def can_write_object(self, obj):
    return (self.user.is_staff or
        self.userprofile.has_permission(obj, Permission.READ_WRITE))

如果policy.can_write_object()函数返回true

，我只希望显示此按钮

- if groups
    - for group in groups
        .btn-group
            - if policy.can_write_object(group)
                %a.btn.btn-mini{
                :data-toggle => "modal",
                :onclick => "$(\"#groupmodalcontainer\").load(\"{% url group group.id %}\");",
                }
                Modify Group

但是，我一直收到此错误

TemplateSyntaxError

Could not parse the remainder: '(group)' from 'policy.can_write_object(group)'