Re: Anyone want to do Google Summer of code mentoring for PSF?
Jan-Wijbrand Kolman <[email protected]>
| Newsgroups | gmane.comp.web.zope.devel |
|---|---|
| Message-ID | <[email protected]> |
On 3/20/11 16:12 PM, Wichert Akkerman wrote: >>> Both Grok and Pyramid (or martian and venusian really) do a scan of >>> the code to find the registration hints. >> >> Pyramid only does so if you tell it to do so by using config.scan(). You >> are not obliged to do that, and I have several pyramid projects which do >> not do any scanning. Not doing scanning has the advantage of making >> configuration more explicit, and it speeds application startup immensely. Just to get this clear for me: if you're not scanning, the information left by the class decorators would be "inert"? So, you'd have to do the registrations "yourself", right? > Let me try to argue this better. Downsides of scanning are: > > - it scans your tests, which can result in unexpected behaviour you > may not expect (at least for venusian, not sure if this is true for > martian). Martian skips tests by default. You can tell it, at least to a certain extend, what to scan and what not to scan. > - you may have some draft files in your tree that are not ready for use > and never referenced anywhere, but a scan will still process them. This is true. > - scanning can take a long time, making application (re)start slow for > non-trivial projects At what point is an application not trivial anymore? In applications I build so far, startup time has not been an issue at all. But maybe my applications are still on the trivial-end of the spectrum ;) > - problems in the scanning process tend to be very hard debug. If a > view is not processed during scanning figuring out why can be > painful, and there are little to no tools to help you. This is > especially true for more complex scanning environments such as the > plone/dexterity/z3cform stack; as an example I spent over an hour > yesterday trying to figure out why a form was not picked up while > other views in the same python file worked fine. I think this can be true. In my experience not relying on implicitly or "guessed configuration parameters helps a little here. What in this specific example was the reason for the view not being picked up? regards, jw _______________________________________________ Zope-Dev maillist - [email protected] https://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - https://mail.zope.org/mailman/listinfo/zope-announce https://mail.zope.org/mailman/listinfo/zope )