I was thinking of scripted table creation and keeping things simple
but I understand what you are saying (or reiterating since it has been
said before).

If no valid case is made then I could change the manual to explain why
it is not supported.
Pros/Cons?

Denes.

On Nov 11, 11:18 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
> From a syntactical point of view it would not take much to support
> multi-table circular references in web2py. That is not why they are
> not implemented, They are not implemented because they are bad design
> practice.
>
> If this is a 1-1 relation, there is no need to table A to refer to B
> and B to A. It is sufficient that A points to B.
>
> If this is a many-many this should be done via a link table.
>
> I cannot think of any test case when this is a good idea. web2py sets
> constraints for the purpose of enforcing good practice.
>
> Massimo
>
> On Nov 11, 10:05 am, DenesL <denes1...@yahoo.ca> wrote:
>
> > Some of you have missed Mirek's point, and he has a very valid one.
> > The problem is circular references.
> > There are ways around it but no elegant solution yet.
>
> > There was discussion some time ago about lazy evaluation of tables.
>
> > I also would like to see this solved in web2py.
>
> > Denes.
>
> > On Nov 11, 10:36 am, Mirek Zvolský <zvol...@seznam.cz> wrote:
>
> > > >> Here's a link to the section in the book:
> > > >>http://www.web2py.com/book/default/chapter/06#Self-Reference-and-Aliases
>
> > > Yes, I know this, and from that reason I always use 'reference..'
> > > style syntax.
>
> > > However this is about very special foreign keys, which targets to same
> > > table (to the primary key in same table).
>
> > > And if there is some cycle in joins in the model (and of course it
> > > always is, except of very, very simple models), this will not help.
> > > And there is realy no solution for this in web2py ??

Reply via email to