[Erp5-dev] allowed content type has None values

[Jacek Medrzycki]

Hi

Today I have upgraded rather old site (february/march) and I 've got the 
following error while trying to display documents:

    * Module Products.ERP5Type.patches.CMFBTreeFolder, line 53, in
      CMFBTreeFolder_allowedContentTypes
    * Module Products.ERP5Type.patches.CMFBTreeFolder, line 52, in <lambda>

AttributeError: 'NoneType' object has no attribute 'isConstructionAllowed'


I have found that in Products.ERP5Type.patches.CMFBTreeFolder, in 
CMFBTreeFolder_allowedContentTypes, the list of portal types contains 
None value, so the filter fails on typ.isConstructionAllowed(...)

I've made small (and rather ugly ;) patch that filters out None value, 
and the site appears to work after applying this. However, I don't know 
why allowed content type list contains None. Is it becouse of the old 
site I had, or something is broken in ERP5? Did anybody have similar 
symptoms?

Regards, Jacek

the patch:
Index: CMFBTreeFolder.py
===================================================================
--- CMFBTreeFolder.py   (revision 14597)
+++ CMFBTreeFolder.py   (working copy)
@@ -51,7 +51,7 @@

   return filter( lambda typ, container=self:
                     typ.isConstructionAllowed( container )
-               , result )
+                   , filter(lambda typ: typ is not None,result) )