[BlueBream] Exception views, again

[Michael Howitz]

Am 04.08.2010 um 00:26 schrieb Justin Ryan:
> Hiya..

[snipped some details]

> And, the Unauthorized view:
> 
>  <browser:page
>     for="zope.exceptions.IUnauthorized"
>     name="index"
>     permission="zope.Public"
>     template="unauth.pt"
>     layer="unauth.welcome.interfaces.ISampleApplicationBrowserLayer"
>     />

Your declaration is correct but it misses the default view declaration:

  <browser:defaultView
      name="index"
      for="zope.publisher.interfaces.INotFound"
      layer="unauth.welcome.interfaces.ISampleApplicationBrowserLayer"
      />

The reason is that on error the default view of the exception is looked up. When it is not found the default "template" is used. See zope/app/publication/zopepublication.py around line 370

                name = queryDefaultViewName(exception, request)
                if name is not None:
                    view = zope.component.queryMultiAdapter(
                        (exception, request), name=name)

This requirement might be confusing but it allows the exception views to have other view names than the rest of the application.


Yours sincerely,
-- 
Michael Howitz · mh at gocept.com · software developer
gocept gmbh & co. kg · forsterstraße 29 · 06112 halle (saale) · germany
http://gocept.com · tel +49 345 1229889 8 · fax +49 345 1229889 1
Zope and Plone consulting and development