I don't understand the reason for the error... Did it happen because
source and destination are the same object or something? Otherwise I
don't see where the duplicate key is created?
Andrus
On Jan 17, 2008, at 8:28 AM, Marcin Skladaniec wrote:
> Hello
>
> I have encountered an exception when trying to merge relationships
> using this code :
>
> Artist source;
> Artist destination;
> while (source.getPaintings().size() > 0) {
> Object value = source. getPaintings().get(0);
>
> source.removeFromPaintings(value);
> destination.addToPaintings(value);
> }
>
> This code works for one-to-many relationships, no surprise. For the
> many-to-many relationships with intermediate table with compound pk
> the result is, that upon commit an error message comes up:
>
> The statement was aborted because it would have caused a duplicate
> key value in a unique or primary key constraint or unique index
> identified by 'SQL071114101016080' defined on
> 'ARTIST_PAINTING'.java.sql.SQLException: The statement was aborted
> because it would have caused a duplicate key value in a unique or
> primary key constraint or unique index identified by
> 'SQL071114101016080' defined on 'ARTIST_PAINTING'
>
> It is a perfectly valid error message, and we have avoided it
> already, but shouldn't cayenne resolve this internally and prevent
> creating double relationship ?
>
> With regards
> Marcin
>
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