[Zope-CMF] Re: CMF 1.6 change broke Plone compatibility

[Florent Guillaume]

Jens Vagelpohl wrote:
> 
> On 20 Dec 2005, at 23:32, yuppie wrote:
> 
>>> After reading the thread you mention, which isn't all that clear  
>>> when it comes to outlining what the consequences of some of these  
>>> code changes are, I'm confused. I think I can boil it down to one  
>>> question: What is the use of the CMF 1.6 branch if it is not  
>>> compatible to Plone 2.1/2.1.1 and 2.1.2 when it comes out, and  
>>> possibly not even 2.2 since that's only a few months down the road?
>>> I don't quite understand the distinction between "compatible with  
>>> products written for Plone 2.1 but not with Plone 2.1", I can't  see 
>>> any sense in that route... it all comes back to one question:  What 
>>> is the goal for the 1.6 branch? What specific audience is it  
>>> targeted at? I can see what it's apparently *not* targeted at:  
>>> People who work with Plone 2.1 - including those that might be  
>>> interested in taking up GenericSetup for their Plone product. I  had 
>>> thought that was our audience.
>>
>>
>> AFAICT the original target audience were people that want to switch  
>> to Plone 2.2 and reuse Products written for 2.1.
>>
>> That might have changed over time, but the code never reflected  that 
>> change.
> 
> 
> Unless someone fixes that CMFDynamicsomethingFTI thing (or the CMF  1.6 
> branch) people cannot even attempt to run Plone 2.1 or 2.2  against CMF 
> 1.6. This is like a stalemate. Can you suggest how to add  a new kind of 
> factory information class similar to appending it to  that typeClasses 
> structure so Martin can fix the Plone code for  whatever release they 
> want to make CMF 1.6-compatible then?

The "new way" (exemplified by the way CMFCore itself registers 
'Factory-based' type information) is:

- make the class provide ITypeInformation (either directly or through ZCML),

- five:registerClass the class (this makes it available in 
Products.meta_types and for IFAwareObjectManager, which the portal_types ZMI 
add menu uses),

- register an IAdding for it, usually coded in browser/. Using the base 
class provided by CMFCore it's only a few lines.

Florent

-- 
Florent Guillaume, Nuxeo (Paris, France)   CTO, Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com