2021-07-01 Salesforce Read Only

在Set Field-Level Security中，我们有两个Option，如下图所示，一个是Visible，一个是Read Only。基于这两个Option我们可以得到：
If you checked only 'Visible' checkbox then that field will be editable to the users in that profile (Read+Edit).
If you click on both Visible & Read-only then that field will be "Read-only" to that users in that profile.
If you do not check both checkbox for Visible & Read only then that field will be Hidden from users in that profile.

Field-Level Security

• 如果你选择了Read Only的Option，然后触发Trigger去操作该字段的话，你会得到如下的Error Message：System.Exception: Record is read-only

对于标准字段：
字段本身对所有Profile都是可见且不允许修改的
对于标准且Require的字段，是不能从Page Layout上移走的

Page Layout png