[Zope-dev] Re: zope.sqlalchemy, integration ideas

[Martijn Faassen]

Benji York wrote:
> On Fri, May 30, 2008 at 2:35 PM, Martijn Faassen <faassen at startifact.com> wrote:
>> I guess one difference here is that it seems more common in the RDB scenario
>> to have multiple ways to reach the same object, and even if you just publish
>> one, you can get to the actual object in multiple ways.
>>
>> In this case it'd be nice to convince IAbsoluteURL to somehow know which URL
>> option is the best, or alternatively, give the object somehow its
>> 'canonical' location (parent, etc) even if you don't get it that way.
> 
> I have an app that allows the same object to be reachable via several
> URLs.  When we wanted one of the URLs to be preferred (none are really
> "cononical" in my case), then we did just as you suggest above and added
> a way for the IAbsoluteURL adapter(s) to know which URL was preferred.
> It worked out quite well.

Cool. Where does the adapter get the information to make a decision 
from? I mean, how does it know to use URL A and not URL B?

Regards,

Martijn