The main advantage of the new dal is the ability to easily add
adaptors for new backends and map virtual fieldnames into actual
fieldnames. This does not mean you will be able to access legacy
databases that you cannot access today. In fact the only and main
issue is with fields that lack autoincrement it and references that do
not use this field. This "limitation" (same for Django and Rails) is
not going away because it is part of "enforcing good practice" and
because bypassing it does not break the DAL but would break everything
else from form processing to validators.

Massimo

On Aug 10, 9:20 am, DenesL <denes1...@yahoo.ca> wrote:
> On Aug 10, 4:17 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
>
> > I will release the book before the new DAL but the new DAL will be
> > backward compatible. The only differences will be inside. The new DAL
> > is taking longer then expected and I apologize but there is not really
> > much pressure to get it done.
>
> I beg to differ on the urgency of the new DAL.
> For one, being able to access databases not built with web2py would be
> a huge boost for it.
>
> Denes.
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