How to set a Collection's url

Question

let's say I have :

var Book = Backbone.Model.extend();  var Collection = Backbone.Collection.extend({   model: Book,   url: '/books',   initialize: function(){     this.fetch();   }) }) 

How can I change the Collection's url when instantiating a new collection ?

var AdventureBooks = new Books({ url: '/books/adventure' }) does not work

var AdventureBooks = new Books({ category: 'adventure' }) 

and in the Collection definition:

url : '/books/' + this.category does not work either.

Thanks.

Answer 1

The following should work:

var AdventureBooks = new Books(); AdventureBooks.url = '/books/adventure'; 

Answer 2

var Book = Backbone.Model.extend({   "url": function() {     return '/books/' + this.get("category");   } });