如何在Svelte中有条件地禁用字段？(How to disable field conditionally in Svelte?)

 通常，在软件工程中，存储库用于从应用程序的其余部分（通常直接是业务层）抽象数据层（数据库，Web服务），一个很好的例子就是预订网站的这种模式： 
 
  
 
 它通过发布/订阅异步连接接收更新，并将它们发送到其他组件。 因此组件彼此独立。 
 因此，Repository只是一个简单的中介类，用于使应用程序更加模块化，以便您可以更轻松地交换部分，并确保应用程序的其余部分不会打扰数据库连接或HTTP调用等等。 从技术上讲，您可以从Application（或其他任何东西）继承并使用它来保存静态变量等等。 
 
 但正如这里所解释的： 
 
 
 
 应用程序对象不能保证永远留在内存中，它会被杀死。 与流行的看法相反，该应用程序将不会从头开始重新启动。 Android将创建一个新的Application对象并启动用户之前的活动，以便首先假定应用程序从未被杀死。 
 
 
 所以这完全取决于你，你可以根据自己的意愿使用存储库样式，它根本不与Room或其他任何东西联系在一起。 

In general, in Software Engineering a Repository is used to abstract the Data Layer (Database, Web Service) from the rest of the application (usually directly Business Tier), a good example would be this schema of a booking website:
 
 
It receives the updates via the Publish/Subscribe asynchronous connection and sends them to the other components. So the components are independent of each other.
 So Repository is just a simple mediator class that is used to make the application more modular, so that you can swap out pieces easier, and make sure that the rest of the app doesn't bother with DB connections or HTTP calls and so on. So technically, you can inherit from Application (or anything else) and use it to save static variables and so on.
 
But as explained here:
 
 
 
The application object is not guaranteed to stay in memory forever, it will get killed. Contrary to popular belief, the app won’t be restarted from scratch. Android will create a new Application object and start the activity where the user was before to give the illusion that the application was never killed in the first place.
 
 
So it's entirely up to you, you can use the repository style as you wish, it's not at all tied to Room or anything else.