In the general case, the behavior of an object depends on its persistent state. For example, suppose the following line of code executes within the realm of entity manager.
一般情况下，对象的行为取决于其持久性状态。
2
The simplest way to access persistent data is by using the find method. Here is an example of an application using the entity manager to find an object by its primary key.
最简单的访问持久性数据的方法是使用find方法。
3
It should be noted that the command did not change the Object Data Manager (ODM) attributes, meaning they would not be persistent across a reboot.