ember-object-keys.js

Ember.Object.keys = function (obj) {
    if (!(obj instanceof Ember.Object)) {
        return Object.keys(obj);
    }
    if (obj instanceof DS.Model) {
        return Object.keys(obj.toJSON());
    }
    let constructor = obj.constructor,
        objectKeys  = [],
        rx          = /^[a-z][a-z0-9_]*$/i;
    while (constructor && constructor.prototype) {
        objectKeys.push(Object.keys(constructor.prototype));
        constructor = constructor.superclass;
    }
    return _.difference(
        [].concat(...objectKeys.reverse()),
        Object.keys(Ember.Object.prototype)
    ).filter(key => rx.test(key));
};

Ember.Object.ownKeys = function (obj) {
    let rx = /^[a-z][a-z0-9_]*$/i;
    return _.difference(
        Object.keys(obj.prototype || obj.constructor.prototype),
        Object.keys(Ember.Object.prototype)
    ).filter(key => rx.test(key));
};

Ember.Object.toJSON = function (obj) {
    if (!(obj instanceof Ember.Object)) {
        throw Error('Ember.Object.toJSON() expects an instance of Ember.Object');
    }
    if (obj instanceof DS.Model) {
        return obj.toJSON();
    }
    return obj.getProperties(Ember.Object.keys(obj));
};