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    <p>Contrary to popular opinion Ember.js isn't a 'more heavy weight approach' to Backbone.js. They're different kinds of tools that target totally different end products. Ember's sweet spot is applications where the user will keep the application open for long periods of time, perhaps all day, and interactions with the application's views or underlying data trigger deep changes in the view hierarchy. Ember is larger than Backbone, but thanks to <code>Expires</code>, <code>Cache-Control</code> this only matters on the the first load. After two days of daily use that extra 30k will be overshadowed by data transfers, sooner if your content involves images.</p> <p>Backbone is ideal for applications with a small number of states where the view hierarchy remains relatively flat and where the user tends to access the app infrequently or for shorter periods of time. Backbone's code gets to remain short and sweet because it makes the assumption that the data backing the DOM will get thrown away and both items will be memory collected: <a href="https://github.com/documentcloud/backbone/issues/231#issuecomment-4452400">https://github.com/documentcloud/backbone/issues/231#issuecomment-4452400</a> Backbone's smaller size also makes it better suited to brief interactions.</p> <p>The apps people write in both frameworks reflect these uses: Ember.js apps include <a href="https://squareup.com/">Square's web dashboard</a>, <a href="http://www.zendesk.com/">Zendesk</a> (at least the agent/ticketing interface), and <a href="http://www.groupon.com/scheduler">Groupon's scheduler</a>: all applications a user might spend all day working in. </p> <p>Backbone apps focus more on brief or casual interactions, that are often just small sections of a larger static page: <a href="https://www.airbnb.com/">airbnb</a>, <a href="http://www.khanacademy.org/">Khan Academy</a>, <a href="https://foursquare.com/">Foursquare's map and lists</a>.</p> <p>You <em>can</em> use Backbone to make the kinds of applications that Ember targets (e.g. <a href="http://rdio.com">Rdio</a>) by a) increasing the amount of application code you're responsible for to avoid problems like memory leaks or zombie events (I don't personally recommend this approach) or b) by adding 3rd party libraries like <a href="http://marionettejs.com/">backbone.marionette</a> or <a href="https://github.com/onsi/coccyx">Coccyx</a> – there are many of these libraries that all try to provide similar overlapping functionality and you'll probably end up assembling your own custom framework that is bigger and requires more glue code than if you'd just used Ember.</p> <p>Ultimately the question of "which to use" has two answers.</p> <p>First, "Which should I use, generally, in my career": Both, just like you'll end up learning any tools specific to work you'll want to do in the future. You'd never ask "Backbone or D3?"; "Backbone or Ember" is an equally silly question.</p> <p>Second, "Which should I use, specifically, on my next project": Depends on the project. Both will communicate with a Rails server with equal ease. If your next project involves a mix of pages generated by the server with so-called "islands of richness" provided by JavaScript use Backbone. If your next project pushes all the interaction into the browser environment, use Ember.</p>
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    1. POEmber.js or Backbone.js for Restful backend
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    1. USTrek Glowacki
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    1. COGreat response, Trek. Just wanted to comment here that `Expires` and `Cache-Control` help far less than people think—especially in terms of mobile devices which often ignore them. I remember a version of iOS ignored them completely (but still listend to HTML5 cache manifest). Additionally these header values won't help during the first visit from a user—which generally is the most critical in deciding whether the user will stay and use your app. Saying all that 30kb file difference doesn't seem like that big of a deal to me. Is that raw or a minified and gzipped 30k difference?
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      1. USMauvis Ledford
    2. COIf you go look at actual applications that are the style Ember is intended to help create, you'll find there's no escaping those pesky kbs. Either they're coming from Ember and your application code is smaller, or they're coming from backbone plugins, or they're coming from code you write yourself. [Wunderlist](http://www.wunderlist.com/), which you'd think would be "simple" clocks in at around 300kb of transfer. I'd imagine it'd be similarly sized with Ember, perhaps smaller – having never written an exact copy Wunderlist I can't say with 100% certainty.
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    3. COI agree, my most popular backbone app clocks in at 178kb+templates compressed and minified. Just pointing out how we shouldn't rely on browser caching.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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