Folder uses an OOBTree to store it's data, so it should be ok. But if you
want to use BTreeContainer and have it work as a Site, you just have the mix
the two together in a custom container class:

from zope.app.container.interfaces import IContainer
from zope.app.component.interfaces import IPossibleSite

class IMyFolder(IContainer, IPossibleSite):
    """My Custom Container"""

from zope.app.component.site import SiteManagerContainer
from zope.app.container import btree

class MyFolder(SiteManagerContainer, btree.BTreeContainer):
    zope.interface.implements(IMyFolder)

Then the following should work:


if 'AR' not in root['Application']:
   root['Application']['AR']=MyFolder()
    sm = LocalSiteManager(root['Application']['AR'])
   root['Application']['AR'].setSiteManager(sm)
   transaction.commit()


Randy



On Tue, Jul 8, 2008 at 11:10 AM, Tim Cook <[EMAIL PROTECTED]>
wrote:

> I am building a platform where I want to initialize the ZODB (that will
> be running under Zope) with three folders with sitemanagers.
>
> If I use Folders like this:
>
> if 'AR' not in root['Application']:
>    root['Application']['AR']=folder.Folder()
>    sm = LocalSiteManager(root['Application']['AR'])
>    root['Application']['AR'].setSiteManager(sm)
>    transaction.commit()
>
> it works great and I can then add initial objects to the folders.
>
> But, these folder sill potentially contain tens of thousands of objects
> so I really want to use BTree Folders.  But when I do this:
>
> from zope.app.container.btree import BTreeContainer
>
> ... <lots of other stuff>
>
> if 'AR' not in root['Application']:
>    root['Application']['AR']=BTreeContainer()
>    sm = LocalSiteManager(root['Application']['AR'])
>    root['Application']['AR'].setSiteManager(sm)
>    transaction.commit()
>
> I get this:
>
>  File
> "/home/tim/projects/ref_impl_python/TRUNK/oship/src/oship/atbldr/atbldr.py",
> line 78, in ?
>    root['Application']['AR'].setSiteManager(sm)
> AttributeError: 'BTreeContainer' object has no attribute
> 'setSiteManager'
>
> So BtreeContainers don't have a siteManager.
>
> I would like to OOBTree but I have been unable to even discern the
> proper way to import it.
>
> Thanks.
>
> Tim
>
>
>
>
>
> --
> Timothy Cook, MSc
> Health Informatics Research & Development Services
> LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook
> Skype ID == timothy.cook
> **************************************************************
> *You may get my Public GPG key from  popular keyservers or   *
> *from this link http://timothywayne.cook.googlepages.com/home*
> **************************************************************
>
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