Computed property depending on ALL properties of #each - ember.js

Question

I've used before the type of computed property that looks like this:
isAnyoneHungry: function () {
var everyone = this.get('everyone'),
anyoneHungry = false;
everyone.forEach(function(person) {
if (person.get('isHungry')) {
anyoneHungry = true;
}
});
return anyoneHungry;
}.property('everyone.#each.isHungry'),
everyone: Ember.A() // an array that will hold person models
for computing something based on one property of each object in an array.
Is it possible to make a computed property based on every property of each object in an array?
Say that the person model has many boolean properties like isHungry, isTired, isCranky, ... and I want to be able to recompute this property when any one of those changes. But I'm lazy and don't want to type every single property like this:
function(){...}.property('everyone.#each.isHungry', 'everyone.#each.isTired', 'everyone.#each.isCranky'.
Instead I'd like something like this:
isAnyoneUnhappy: function () {
var everyone = this.get('everyone'),
isAnyoneUnhappy = false;
everyone.forEach(function (person) {
if (person.get('isHungry') || person.get('isTired') || person.get('isCranky')) {
isAnyoneUnhappy = true;
}
});
return isAnyoneUnhappy;
}.property('everyone.#each.iWantEveryPropertyHere')
Is this possible in Ember yet?

Answer 1

Have you tried the following?
isAnyoneUnhappy: function () {
var everyone = this.get('everyone'),
isAnyoneUnhappy = false;
everyone.forEach(function (person) {
if (person.get('isHungry') || person.get('isTired') || person.get('isCranky')) {
isAnyoneUnhappy = true;
}
});
return isAnyoneUnhappy;
}.property('everyone.#each.*')
I looked into the Ember source and there seems to be some logic dealing with the star notation. I am not sure though.

Answer 2

Ideally you should have a property on person that rolls up the unhappy attributes, something like:
isUnhappy: function () {
if (this.get('isHungry') || this.get('isTired') || this.get('isCranky')) {
return true;
}
}.property('isTired', 'isHungry', 'isCranky')
Then isAnyoneUnhappy just observes everyone.#each.isUnhappy