如何使用ember-data手动设置对象状态进行清理（保存） [英] How to manually set an object state to clean (saved) using ember-data

问题描述

说明：

我正在使用ember-data作为我的一个项目，我有一个问题，围绕着弄脏对象的可能性，然后设置它状态再次清理 - 没有提交更改。说明我已经通过 banana = App.Fruit.find（'banana'）; 它有一个黄色水果！的描述。使用XHR长轮询（或WebSockets），我可能会收到对象的更新版本，因为另一个用户将描述更改为美味的黄色水果！在之后的任何给定时间点，我获取了原始对象。

然后，我想做的是更新对象以反映新接收的数据。为此，我尝试了不同的方法：

• 我尝试调用 App.Store。加载（App.Fruit，new_data）; 。首先，这种方法不行，其次，这不是我想要的。我可以自己对对象做出未提交的更改，在这种情况下，抛出这些错误是不合适的（假设 load（）调用将覆盖它们） / p>




• 我尝试循环使用新数据，调用 .set（） - 像这样： code> banana.set（'description'，new_data.description）; - 为了使用新数据更新对象属性（如适用=不脏）。

为了使对象清洁/重新更新 - 并且不使适配器提交更改！ - 我已经看了对象通过的状态。这些是（至少）：

• 步骤1：最初，对象位于 rootState.loaded.saved 状态。


• 步骤2：在属性上调用 .set（）将其推送到 rootState.loaded.updated.uncommitted state。


• 步骤3：调用 App.store.commit（）; 将对象返回到 rootState.loaded.saved 状态。

$ b $因此，我尝试在步骤2之后手动将对象状态设置为保存，如下所示： banana.get（'stateManager' ）.goToState（'saved'）; 。

但是，这不起作用。在下一次由于任何其他原因导致商店出现时，此操作会在FlightDirtyReasons中生成 错误。

问题：

我的问题是：如何手动将脏物体的状态重新改回清洁（保存）？

解决方案

查看ember数据，未提交的状态有一个'gotClean'事件，因此将记录设置为loaded.saved。

  record.get（'stateManager'）。send（'becomeClean'）; 
  

Explanation:

I'm using ember-data for a project of mine and I have a question that revolves around the possibility of dirtying an object and then setting its state to clean again on purpose - without commiting the changes. The scenario is this:

Say I've fetched an object via banana = App.Fruit.find('banana'); and it has a description of "Yellow fruit!". Using XHR long-polling (or WebSockets), I may receive an updated version of the object because of another user having changed the description to "A tasty yellow fruit!" at any given point in time after I fetched the original object.

Then, what I would like to do is to update the object to reflect the newly received data. For this, I've tried different approaches:

• I've tried calling App.Store.load(App.Fruit, new_data);. First of all, this approach doesn't work and secondly, this is not really what I want. I could've made uncommitted changes to the object myself and in this case, it would be undesirable to just discard those (assuming the load() call would overwrite them).

• I've tried looping through the new data, calling .set() - like so: banana.set('description', new_data.description); - in order to update the object properties with the new data (where applicable = not dirty). This works but it leaves the object in a dirtied state.

In order to make the object clean/updated again - and not have the adapter commit the changes! - I've taken a look at the states the object travels through. These are (at least):

• Step 1: Initially, the object is in the rootState.loaded.saved state.
• Step 2: Calling .set() on a property pushes it to the rootState.loaded.updated.uncommitted state.
• Step 3: Calling App.store.commit(); returns the object to the rootState.loaded.saved state.

Therefore, I've tried to manually set the object state to saved after step 2 like so: banana.get('stateManager').goToState('saved');.

However, this doesn't work. The next time the store commits for any other reason, this maneuver produces an inFlightDirtyReasons is undefined error.

Question:

My question is: how can I manually change the state of a dirtied object back to clean (saved) again?

解决方案

Looking at ember-data the uncommitted state has a 'becameClean' event which consequently sets the record as loaded.saved.

This should do the trick

record.get('stateManager').send('becameClean');  

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