[Zope3-dev] Re: Zope 3 as a reliable platform?!?

[Martijn Faassen]

Chris Withers wrote:
> Lennart Regebro wrote:
>> I agree. And as long as you move from one version to the next, it's
>> not a problems, since we have BBB-code. 
> 
> I'm sorry, I don't buy this. BBB code goes away, that means you have to 
> deal with the churn at some point. It's the churn that's the problem...

Just to give some real data on this from someone who actually spent time 
updating applications: the churn is there, but it's like this causes 
absolutely massive amounts of work, and the deprecation warnings are 
usually pretty helpful.

It took me a few hours to get the DocumentLibrary code ported from Zope 
3.2 to Zope 3.3, for instance.

I also was involved in making Schooltool run with Zope 3.3. This was 
actually following the trunk, but there was a massive change when the 
component-architecture refactoring + moving modules branch landed. I 
think it took me a full afternoon, perhaps a day, to get up to speed on 
that. Schooltool is an exceptionally massive Zope 3 project though 
that's been developed for a long time, so probably not representative of 
most codebases. Usually it should be easier.

What's your experience with updating your Zope 3 projects, Chris?

Regards,

Martijn