ember.js - 从商店中取出物品时如何检测脏污？

Question

我有一个商店，里面有从服务器检索到的物品。我想检测更改以相应地更改 UI。

我能够检测到脏记录（新的、更新的），但我不知道如何检测删除，我还需要处理...

我的问题的一个例子：http: //jsfiddle.net/MikeAski/bBUB2/

任何想法？

Answer 1

There are two things you need to do:

1. Keep track of what posts were originally there so you can mark it as dirty if one is deleted.
2. Keep track of new posts, and if they are deleted then mark that part as clean.

Because of your call to each post's isDirty function, you are only checking if the current posts have been updated or created. You basically need a snapshot of what posts exist when it is clean, and then you can compare if any of those have been deleted.

You can also keep a record of newly added posts. That way when one is deleted you can check if it was added(add a isNew flag or something similar). Then when it is deleted you can check if it isNew and mark it clean again otherwise it makes it a dirty delete.

To do these things, you will need a function that checks for deletes as the first dirty check and then check the posts like you currently are.

Answer 2

我终于找到了出路：http: //jsfiddle.net/MikeAski/bBUB2/7/

与 jsworkman 建议的解决方案相比，此解决方案对模型的干扰较小。不完全令人满意，但按预期工作......：-/

仍然对更好的实施而不是变通方法感兴趣的解决方案感兴趣！