backbone-deep-model

Improved support for models with nested attributes.

Allows you to get and set nested attributes with path syntax, e.g. user.type.

Triggers change events for changes on nested attributes.

Dependencies

Backbone >= 0.9.9

_.deepClone and _.deepExtend mixins. (See Installation section below).

Installation

1. Include Backbone and it's dependencies in your page/app.
2. Include lib/underscore.mixin.deepExtend.js if you haven't already.
3. Include src/backbone-deep-model.js.

Usage

Then just have your models extend from Backbone.DeepModel instead of Backbone.Model.

Example code:

//Create models with nested attributes
var model = new Backbone.DeepModel({
    id: 123,
    user: {
        type: 'Spy',
        name: {
            first: 'Sterling',
            last: 'Archer'
        }
    },
    otherSpies: [
        { name: 'Lana' },
        { name: 'Cyrril' }
    ]
});

//You can bind to change events on nested attributes
model.bind('change:user.name.first', function(model, val) {
    console.log(val);
});

//Wildcards are supported
model.bind('change:user.*', function() {});

//Use set with a path name for nested attributes
//NOTE you must you quotation marks around the key name when using a path
model.set({
    'user.name.first': 'Lana',
    'user.name.last':  'Kang'
});

//Use get() with path names so you can create getters later
console.log(model.get('user.type'));    // 'Spy'

//You can use index notation to fetch from arrays
console.log(model.get('otherSpies.0.name')) //'Lana'

Author

Charles Davison - powmedia

Contributors

• mattyway
• AsaAyers

Changelog

0.9.0:

• Support Backbone 0.9.9 (mattyway)
• Add support for deep model defaults (mattyway)

0.8.0:

• Allow nested attribute as Model identifier (milosdakic)
• Add AMD support (drd0rk)
• Added "change:*" event triggers for ancestors of nested attributes. (jessehouchins)
• JSHint linting (tony)
• Fix: undefined in setNested resulting from a recent change in backbone master. (evadnoob)

0.7.4:

• Fix: #22 model.hasChanged() is not reset after change event fires
• Fix: #18 Setting a deep property to the same value deletes the property (mikefrey)
• Allow setting nested attributes inside an attribute whose value is currently null (sqs)

0.7.3:

• Add DeepModel.keyPathSeparator to allow using custom path separators

0.7.2:

• Check if the child object exists, but isn't an object. #12 (tgriesser)

0.7.1:

• Model.changedAttributes now works with nested attributes.
• Fix getting attribute that is an empty object

0.7:

• Update for Backbone v0.9.2