Backbone JS Models and Collection URLs

Question

If I have a model named \"Book\" and a collection named \"Library\" defined as below:

Book

app.Book = Backbone.Model.extend({
    defaults: {
        tit         


        

Answer 1

Basically, there are 3 possibilities to construct a model's url:

• If the model object exists in a collection then its url method will return an address composed of the collection.url and model.id: [collection.url]/[id].

• If you don't want to use a model inside the collection, then model.urlRoot's value can be used instead of the collection.url fragment, resulting in the following pattern: [urlRoot]/[id].

• Finally, if you're NOT planning to persist more that one model of a given type to the server or will be defining URLs for each model upon their creation, you can directly assign a value to model.url.

Collections send only GET requests — to get an array of models' JSON data. For saving, removing, and updating, the individual model's save() (POST/PUT/PATCH) and destroy() (DELETE) methods are used.

Here's the source code of Backbone.Model.url, which should help you:

url: function() {
  var base =
    _.result(this, 'urlRoot') ||
    _.result(this.collection, 'url') ||
    urlError();
  if (this.isNew()) return base;
  var id = this.get(this.idAttribute);
  return base.replace(/[^\/]$/, '$&/') + encodeURIComponent(id);
}