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POHow to manually set an object state to clean (saved) using ember-data
 

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  1. POHow to manually set an object state to clean (saved) using ember-data
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    <h2>Explanation:</h2> <p>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:</p> <p>Say I've fetched an object via <code>banana = App.Fruit.find('banana');</code> 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 <em>after</em> I fetched the original object.</p> <p>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:</p> <ul> <li><p>I've tried calling <code>App.Store.load(App.Fruit, new_data);</code>. 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 <code>load()</code> call would overwrite them).</p></li> <li><p>I've tried looping through the new data, calling <code>.set()</code> - like so: <code>banana.set('description', new_data.description);</code> - 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.</p></li> </ul> <p>In order to make the object clean/updated again - and <strong>not</strong> have the adapter commit the changes! - I've taken a look at the states the object travels through. These are (at least):</p> <ul> <li>Step 1: Initially, the object is in the <code>rootState.loaded.saved</code> state.</li> <li>Step 2: Calling <code>.set()</code> on a property pushes it to the <code>rootState.loaded.updated.uncommitted</code> state.</li> <li>Step 3: Calling <code>App.store.commit();</code> returns the object to the <code>rootState.loaded.saved</code> state.</li> </ul> <p>Therefore, I've tried to manually set the object state to <code>saved</code> after step 2 like so: <code>banana.get('stateManager').goToState('saved');</code>.</p> <p>However, this doesn't work. The next time the store commits for any other reason, this maneuver produces an <em>inFlightDirtyReasons is undefined</em> error.</p> <h2>Question:</h2> <p>My question is: how can I manually change the state of a dirtied object back to clean (saved) again?</p>
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