On Sun, Jul 18, 2010 at 02:40:47PM +0200, Leandro Hermida wrote: > very good points and makes a lot of sense. If I can ask a more general > question then, why do ORMs exist in the first place and why are they so > popular vs using a object persistence mechanism? There must be some serious > advantage to using them. >
Because there yet does not exist a persistent object store, that can be asked to fetch "all objects which have related objects whose attribute X is Y", and which will do so by *transparrently* using native SQL methods (namely GROUP BY over a joined resultset). Matt Trout is working on the foundation of just such a "mapper", but this is a very very hard problem to get right, so progress is slow. _______________________________________________ List: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/dbix-class IRC: irc.perl.org#dbix-class SVN: http://dev.catalyst.perl.org/repos/bast/DBIx-Class/ Searchable Archive: http://www.grokbase.com/group/[email protected]
