How to observe all object property changes?

Question

For arrays I know you can do something like this:

function() {
}.observes("array.@each")

What I did was convert the object into an array and observe the properties with a @each, but is there a better way to observe object all property changes without converting it into an array?

Answer 1

You can observe isDirty to see if any of the object's values have been modified since last save (if you are using Ember Data).

Alternatively you can pass a comma separated list of properties to observes. This might be long if you have a lot of properties on your object, but will work.

A third approach could be to override setUnknownProperty() and set a property, a 'dirty flag' (or perform any action you may want in there.

There's also an old SO post that gives the following answer:

App.WatchedObject = Ember.Object.extend({
  firstProp: null,
  secondProp: "bar",

  init: function(){
    this._super();
    var self = this;
    Ember.keys(this).forEach(function(key){
      if(Ember.typeOf(self.get(key)) !== 'function'){
        self.addObserver(key, function(){
          console.log(self.get(key));
        });
      }
    }); 
  }
});

You could probably split this out into a Mixin to keep your code DRY.