Webmaster Forum / ColdFusion / Advanced Techniques / June 2007

Hi
At the moment i have a contact manager application i am building.
a contact has a title (mr/mrs/miss) and can have multiple addresses, multiple
telephone numbers.

CFC's dont allow me to do multiple inheritance. I can extend to 1 component
then extend to the next one in a kind of "daisy chain" but this is not ideal,
if anything changes in my application there are a lot of dependencies.

I have been told by Hal Helms to use something called aggregation but I am
finding this concept difficult to grasp.

I believe i am supposed to do something like the following see attached code:

This seems to work fine, i have a setTitle() method in the contact.cfc which
creates the title object.

The problem is, as soon as i reference the setTitle() method from within the
contact.cfc I can error saying that the return type is not of type "title"

I think i've either got this completely wrong or i'm missing something.

Can someone please help?

My e-mail address is matt.kennedy@coastdigital.co.uk

contactObj =
createObject("component","components.contact").init("#application.settings.dsn#"
);
titleObj =
createObject("component","components.contact.title").init("#application.settings
.dsn#");

titleObj.setTitleID( form.titleID );

contactObj.setTitle(titleObj);