How to determine which property caused Computed Property to change?


Is there a convenient way to tell which property would have caused a computed property to update if it is observing multiple values?

In other words given something like this:

  myComputed: function() {
    // do some work
  }.property('foo', 'bar', 'baz')

How can I easily tell whether ‘foo’, ‘bar’ or ‘baz’ triggered the change?

Can I conditionally observe changes? Meaning only update if say foo is greater than some value, etc.


You could flag the changes by using observes('foo) etc, and then the next time myComputed is entered you can check which has been flagged and react accordingly.


OK that would work. I was just more curious if computed properties had some internal mechanism which already does this?