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From "Juergen Saar" <>
Subject Re: "map" properties?
Date Tue, 16 Jan 2007 08:49:29 GMT
I think this is a little special ...

if you have 1..n relation to addresses this could make sense, but for a
relation order to positions this would be difficult. The only way cayenne
could provide a generell map is the PK an I don't think that this would be
helpful. All other attributes are nor secured unique ...

I think for the few cases where this makes sense, I would write a little
helper method.

--- Juergen ---

2007/1/16, Robert Zeigler <>:
> Currently (to the best of my knowledge), cayenne always represents a
> to-many relationship as a java.util.List. However, I was thinking it
> would be nifty if cayenne supported map-representations of to-many
> relationships. For instance, you could model a relationship between
> Users and UserPreferences as a map, and specify the "name" property of
> the UserPreferences table as the map key.  Does that make sense? Am I
> the only one who thinks that would be incredibly useful? :) Is something
> like this already planned for 3.0?
> If other people would find it useful, then I'd be happy to submit a
> feature request and also work up a patch.
> Robert

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