discourse/app/assets/javascripts/discourse/models/model.js

/**
  A base object we can use to handle models in the Discourse client application.

  @class Model
  @extends Ember.Object
  @uses Discourse.Presence
  @namespace Discourse
  @module Discourse
**/
Discourse.Model = Ember.Object.extend(Discourse.Presence, {

  /**
    Update our object from another object

    @method mergeAttributes
    @param {Object} attrs The attributes we want to merge with
  **/
  mergeAttributes: function(attrs) {
    var self = this;
    _.each(attrs, function(v, k) {
      self.set(k, v);
    });
  }
});

Discourse.Model.reopenClass({

  /**
    Given an array of values, return them in a hash

    @method extractByKey
    @param {Object} collection The collection of values
    @param {Object} klass The class to instantiate
  **/
  extractByKey: function(collection, klass) {
    var retval = {};
    _.each(collection, function(item) {
      retval[item.id] = klass.create(item);
    });
    return retval;
  }
});