I considered using a virtual attribute that would do the summing of the fields, and then use a validator on that value, however, I am not exactly sure how to implement it.

我认为使用虚拟属性，会做总结的域，然后使用器上的价值，然而，我不知道如何实现它。

youdao

For the Virtual member Manager to understand which groups an object is a member of, you need to define the associated membership attribute for the object class.

要让Virtual Member Manager知道某个对象属于哪个组，您需要为对象类定义相关的成员关系属性。

youdao

Add a custom attribute to the end of the virtual array.

把一种定制属性添加到虚拟阵列的末端。

youdao