Updates.md. Recently, we've been working on extracting Ember conventions from applications we're working on into the framework. Our goal is to make it clearer how the parts of an Ember application work together, and how to organize and bootstrap your objects. Routing is an important part of web applications. It allows your users to share the URL they see in their browser, and have the same things appear when their friends click on the link. The Ember.js ecosystem has several great solutions for routing. But, since it is such an important part of most web applications, we've decided to build it right into the framework. If you have already modeled your application state using Ember.StateManager, there are a few changes you'll need to make to enable routing. In order to make state managers more robust, we are now enforcing some new rules about how they are architected.
Here are the new rules: You tell Ember.js what to put in the URL by adding a route property to your states. Dynamic Segments Nested Views. Ember 1.0 RC4. How to do cool stuff with the new Router API. Update 6/14/13 Guide to latest API enhancements router.js PREmber PRLatest Ember build with these changes Below are some examples of how to use the newly enhanced async router API. How do I prevent a transition when a form is half filled out? Catch the Transition in FormRoute's willTransition event handler and call .abort() on the provided transition. Demo Note: if you intercept a URL transition, your URL will get out of sync until the next successful transition. How do I put up a (global) Loading Spinner during a transition w/ Promises? Existing LoadingRoute behavior is preserved: define LoadingRoute which displays a spinner in enter/setup and removes it in exit. Demo How can I let the destination route define the UI?
E.g. we're entering the AdminRoute from some other route, and we want Admin route to put up some UI that says "Loading Admin Panel". You can use the above setup, combined with logic in the destination route's validation hooks, e.g: Demo This is beyond the scope of this iteration. Ember Starting Point. Ember Starting Point. Ember Starting Point. Ember Starting Point. Ember Starting Point. Ember Starting Point. Guide to the Router Facelift. Ember Router Async Facelift The Ember router is getting number of enhancements that will greatly enhance its power, reliability, predictability, and ability to handle asynchronous loading logic (so many abilities), particularly when used in conjunction with promises, though the API is friendly enough that a deep understanding of promises is not required for the simpler use cases.
Why? Semantic differences between app-initiated transitions and URL-initiated transitions made it very challenging in certain cases to handle errors or async logicAuthentication-based apps were especially difficult to implementredirect was sometimes called when a promise model was resolved, sometimes not, depending on in-app/URL transition Solution The solution was to embrace async and make router transitions first class citizens. WillTransition events fired on current routes whenever a transition is about to take place.beforeModel/model/afterModel hooks during the async validation phase. willTransition. AsyncRouterLinkTo.jpg (JPEG Image, 985 × 1380 pixels) Ember.js Routing - The Final Cut - The Software Simpleton. This is my third post about the now infamous ember.js router. My initial reaction to the new router was mixed as I quite liked the old router but over time, I have grown to like it.
One thing that is undeniable about the new router is that it is much easier on the wrist and fingers as it requires writing considerably less code. That said, the new router is heavily convention based and there were initial periods of bewiderment as I looked at an errorless console and a white screen as my routes were not found. These periods have receded over the passage of time but there are some traps and pitfalls that catch the unaware. These things generally only shake out during real world use. First of all let me set the scene with the model of the sample app that I will use to illustrate the concepts. Model I have a simple application that I have been using for my posts that simply allows a user to create a bank of gym exercises that somebody would use while exercising in the gym. Behold The Router. Ember.js Routing - The Director's Cut - The Software Simpleton. WARN: This article is now out of date. Check this post for a more up to date article on ember routing.
I’ve had a number of requests to update this post which discussed a solution to the lack of routing at that time of writing in ember. This solution used an addon called the ember-routemanager from Gordon Hempton. A lot in Ember has changed since that post and Ember now has its own full blown routing solution that is not a million miles away from the route manager I blogged about. Enough of the old and on with the New The new ember router has been on the master branch for a while now and it is an emerging pattern that is prone to change and indeed has changed quite a bit in its short existence. The Ember router extends the very elegant ember statemanager: The basic premise of the ember routing solution is that you describe your application as a hierarchical tree of objects – one object per conceptual state (Ember.Route extends Ember.State): Nested Routes State transitions and View Changes. EmberJS Router Example | jsFiddle. Anatomy of an Ember.js App Part I Redux: Routing and Outlets - CodeBrief.
Update: Ironically, this "redux" is once again out of date. Please consult the new Ember.js Router Guides Four months ago, in February, I wrote a blog post detailing a strategy for handling routing and layout in Ember.js. This was at a time when there was no support for these features in Ember's core. Today, however, this is not the case. Ember now has the notion of a Router and an {{outlet}} handlebars helper.
These two features supercede the libraries in the previous post (Ember Layout has been completely deprecated and Ember RouteManager has been temporarily frozen.) The bulk of this post will deal with Ember's native router implementation. Ember's Router At the core of Ember's routing solution is Ember.Router. Here is an example from which the following code snippet was extracted: The above code defines a home state in the router which has a route of /. This approach is not ideal for several reasons. Nested Routes and Parameters Since all routes are states, they can also be nested. Our Approach to Routing in Ember.js : Tom Dale. The URL is an important strength that the web has over native apps.
In web apps, the URL goes beyond just being a static reference to the location of a document on a server. The best way to think of it is as the serialization of the application’s current state. As the user interacts with the application, the URL should update to reflect what the user is seeing on their screen. In most applications, state is tracked in an ad hoc way. To answer the question “What is the current state of the application?” You must synthesize several different properties (usually stashed away on different controllers) to arrive at an answer. If there are bugs in your application, it is possible to get into a conceptually broken state. Ember.js’ implementation of state charts solves these issues nicely. It also means that we can easily serialize the state of your application on demand. This is an important departure from how most other web frameworks handle routing.
I’m really excited about this feature.