[Zope3-dev] Associations

[Godefroid Chapelle]

At 23:41 23/01/2002, Jeffrey P Shell wrote:

>A frustrating thing about designing in Zope/ZODB is the difficulty of doing
>non-containment relationships.  While paths *can* be used to refer and get
>to other objects within Zope, the folder-like nature of Zope makes it
>natural to do various move operations (cut/paste, rename) that end up
>invalidating any path reference to a particular object.  This is a common
>grievance, causing many people (myself included) to implement their own
>quick solutions to the problem by taking various approaches (see the
>comments area for the ExplicitObjectReferences proposal [1]).

There is a long time I think I should point to this list that it would be a 
good idea to check in  Borland Delphi how they adress the problem of 
components referencing other components.

Those of us who knows the product know that Delphi form instances own 
component instances which cross-reference other component instances in the 
same form. Those components can be deleted, copied, cut and pasted exactly 
as object instances in the ZMI.

It is really worth it to take a look how they implement their solution. 
Remember that Borland Delphi is sort of open source product (at least the 
VCL -Visual Component Library source code is available).

My 2 Eurocents.

--

Godefroid Chapelle

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