Introduction to Marionette.js – The Backbone Framework/

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Solution: Sorting a Collection

Solution: Sorting a Collection

Follow step-by-step instructions to sort a collection in Marionette using functions.

We'll cover the following...

We can use either a sortBy function or a sort comparator function that expects two arguments.

Solution 1: Using the sortBy function

We create the following function, which has been highlighted in the code provided below:

<script type="text/javascript">
    var ContactManager = new Marionette.Application();

    ContactManager.Contact = Backbone.Model.extend({});

    ContactManager.ContactCollection = Backbone.Collection.extend({
        model: ContactManager.Contact,
        comparator: function(contact) {
            return contact.get("firstName") + " " + contact.get("lastName");
        }
    });

    ContactManager.ContactItemView = Marionette.ItemView.extend({
        tagName: "li",
        template: "#contact-list-item"
    });

    ContactManager.ContactsView = Marionette.CollectionView.extend({
        tagName: "ul",
        childView: ContactManager.ContactItemView
    });

    ContactManager.on("before:start", function(){
    var RegionContainer = Marionette.LayoutView.extend({
        el: "#app-container",

        regions: {
            main: "#main-region"
        } 
    });

    ContactManager.regions = new RegionContainer(); 
    });

    ContactManager.on("start", function(){
        var contacts = new ContactManager.ContactCollection([
        {
            firstName: "Alice",
            lastName: "Tampen"
        }, 
        { 
            firstName: "Bob",
            lastName: "Brigham"
        },  
        {
            firstName: "Alice",
            lastName: "Artsy"
        }, 
        {
            firstName: "Alice",
            lastName: "Arten"
        },
        {
            firstName: "Charlie",
            lastName: "Campbell"
        }, 
        {
            firstName: "Alice",
            lastName: "Smith"
        },
        ]);

        var contactsListView = new ContactManager.ContactsView({
        collection: contacts
        });

        ContactManager.regions.main.show(contactsListView);
    });
    
    ContactManager.start(); 
</script>
Sorting with the sortBy functon

As you can see, the comparator ...

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