Hello UncleCheese, could you explain why we shall use static class variable, not object variable??

I know that this is an old thread, but as I ended up here from Google without seeing other threads in the search results, I'll use this thread.

I knew I had found a solution to this problem earlier and now that I searched for it again I went through my existing code after first searching from Google, and I found it again:

public function onBeforeWrite()
	{
		if ($this->isChanged('ID',2)) //This is a new object
		{
		}
	}

This checks if there is a real data change in the ID field (= triggers when the record is created, not anymore at the second call).

I think this is a little bit cleaner way to solve this problem than creating a static variable. Well, years have passed since the UncleCheese's answer, so perhaps this method was not available back then :).