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POAlternative To Associations with EmberJS/Data
 

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    <p>I've been working on an EmberJS application for about a week now, and have written my own localStorage adapter for EmberJS/Data to allow for data persistence. The app is a small note-taking application. Ideally, I'd like to have a Notebook model that has many Note models associated with it.</p> <p>However, I haven't found a way to do this that results in a mutable array. While you can "implement" a hasMany relation...</p> <pre class="lang-js prettyprint-override"><code>Noted.Note = DS.Model.extend({ title: DS.attr('string'), note_text: DS.attr('string'), }); Noted.Notebook = DS.Model.extend({ title: DS.attr("string"), notes: DS.hasMany(Noted.Note) }); </code></pre> <p>...the ModelArray created by the hasMany method is immutable in EmberJS. It appears that this is currently being worked on - there is an "associations" branch of EmberJS/Data <a href="https://github.com/emberjs/data/tree/associations" rel="nofollow">here</a> - but modifying the ModelArray is critical to this application, to i.e. create a new Note:</p> <pre class="lang-js prettyprint-override"><code>var notebook = Noted.store.createResource(Noted.Notebook, { title: "Foo Notebook" }); notebook.get("notes").pushObject(Noted.store.createResource(Noted.Note, { title: "Bar Note", note_text: "Blah blah blah." })); notebook.get("notes").objectAt(0).get("title") //returns undefined </code></pre> <p>Although the very latest commit of EmberJS/Data does include array mutability, it still lacks any sort of observation - the adapter isn't notified when changes are made, and they are not saved.</p> <p>I'm wondering: what's the best alternative to a hasMany association until this ability is added to EmberJS/Data? I've been looking into different patterns, such as having a note IDs array in the Notebook model with some sort of fetch/retrieve interface to go with it, but I've gotten absolutely nowhere. I've spent quite a good chunk of today trying to figure out the best way to do this, and all I have is a lot of frustration. </p>
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