考虑设置字段更新时如果把某个必须字段设置为更新成空值应该不允许保存
Created by: yinlianghui
反过来在对象管理中把某个字段设置为必须时也要判断下是否有字段更新把该字段设置为空值。
sf文档:Field Update Action Limitations
You can't make a field universally required if it's used by a field update that sets the field to a blank value.