Martijn Faassen writes about implementing extended catalog queries in Zope 3.
Why was this so easy in Zope 3? I think there are two reasons:
- Clean implementation of the catalog makes it code fairly easy to read and thus write similar code. The catalog implementation in Zope 2 is a horror to try understanding, in Zope 3 it really is surprisingly easy. This pattern holds for much of the Zope 3 code base.
- Zope 3 gives every object an integer id using the IntIds utility, which helps making the catalog so clean. IntIds rock!
On the Zope 3 project that I'm getting ready to work on, I'll be dealing with the Zope 3 catalog for the first time. I'm actually looking forward to it. I'd like to see how well the whole process of writing an indexed application in Zope 3 works. Implementing against the ZODB is so nightmarishly easy, and it's nice to tinker with on my desktop without my having to worry about installing an RDBMS, adapters, and so on.
Posted by Jeff Shell at
8:58 AM
