·

1.316K

· lowerkey

Writing a program with what amount to nested collections, I ran into a problem: Backbone.js doesn't have nested collections.

Here's a little workaround:

Name = Backbone.Model.extend({
 defaults: {
 value: '',
 from: '',
 until: '',
 },
});

createNameCollection = function(id){
 var NameCollection = Backbone.Collection.extend({
 model: Name,
 localStorage: new Store('names_' + id);
 });

 return new NameCollection();
};

Now each entity that requires a NameCollection can access it by calling createNameCollection with its own id as a parameter.

In a view, this might look like...

var names = createNameCollection(this.model.id);
names.fetch();
// now you're ready to operate on the NameCollection.

Happy nesting!

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