Re: What is the right way to handle a hierarchy of same-class objects?

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On 21 Feb 2005, at 13:12, Karjala wrote:

> I have a class called (MyTest::)Category.
>
> The table of Category has a field ("father") containing the id of the 
> father category of each category.
>
> Objects that don't have a father, have 0 in that field.

Make that NULL instead of 0, and everything should work as you expect.

best

will

ps. there is a bug to look out for if you are doing this kind of thing 
and also have some class-data declarations (eg columns, relationships, 
temp columns) in both your base class and your data classes. Otherwise 
it's completely straightforward.