CODEWITHSUNDEEP
javascriptasp.net-mvcbackbone.js
Sander
Sander

Reputation: 13421

BackboneJs: how do i bootstrap my data in the page markup, and when do i assign them to my collections

So, building an application that uses multiple (2 for now) global collections, it is a catalog of both documents and patients, they have relations, but not as in, 1 document or a list of documents belonging to 1 patient, so they are in fact 2 separate collections,

my app is structured in a module system very similar to how it is described here: http://weblog.bocoup.com/organizing-your-backbone-js-application-with-modules

the backbone.js documentation says about bootstrapping, to do something like this,

<script>
  Accounts.reset(<%= @accounts.to_json %>);
</script>

that is within a Rails application, i would however need to do it differently in asp.net MVC3, most likely i would just print out my json string without the <%= %> which isn't razor view engine style)

but my question here is,

this Accounts.reset(...data...); is just floating somewhere in my markup, it is not in any way nicely structured in my module system, isn't there a way to nicely do this? where as i can get the data, from within my module?

and another side question, suppose i have a route in my backbone app http://example.com/#documents

and someone calls this link directly, will my app have the data ready (from the bootstrap) on time, before the route itself is executed?

Upvotes: 16

Views: 5008

Answers (3)

Pavel Samoylenko
Pavel Samoylenko

Reputation: 521

The excellent example from Derick! For MVC 3+ use this syntax:

<script language="javascript">
  var myApp = new MyApp( @Html.Raw(Json.Encode(Model)) );
  myApp.start();
</script>

Upvotes: 0

hc2p
hc2p

Reputation: 188

if on Rails: in addition to Dericks answer you might want to use Gon to "get your Rails variables in your js".

then you would initialize your app like that: 

<script language="javascript">
  var myApp = new MyApp(gon.mymodels);
  myApp.start();
</script>

Upvotes: 0

Derick Bailey
Derick Bailey

Reputation: 72858

I tend to setup application objects - an object that encapsulates all of the code needed to start my application. I then take parameters into that object's constructor, so that they can be used by the app object. Passing pre-loaded JSON data into the app object is one of the things I do, to keep the code sane and encapsulated.

It goes something like this, usually:

MyApp = (function(Backbone, _){
  var MyModel = Backbone.Model.extend({});

  var MyCollection = Backbone.Collection.extend({
    model: MyModel
  });

  var MyView = Backbone.View.extend({
    initialize: function(){
      this.collection.bind("reset", this.render, this);
    },

    render: function(){
      // do stuff with the collection here
    }
  });

  var myApp = function(initialModels){
    this.start = function(){
      this.models = new MyCollection();
      this.myView = new MyView({collection: this.models});
      this.models.reset(initialModels);  
    };
  };

  return myApp;
})(Backbone, _);

And then in my page that needs to start up the app, I do this:

<script language="javascript">
  var myApp = new MyApp(<%= mymodels.to_json %>);
  myApp.start();
</script>

That's the rails version of course. Just replace the <%= ... %> with your version for the Razor syntax in ASP.NET MVC.

Upvotes: 10

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