[Zope] Learning to use a BTreeFolder2

2008-11-25 Thread Mr SZ 
Hi All,

I am writing a product to manage the back end operations of users.I need to 
store lots of user info.My first plan was to use ZSQL but then I read about 
ZODB and more specifically OOBTrees and BTreeFolder2. My objective is to store 
user related stuff on ZODB but not litter the ZODB but to instead organize into 
folders. I read the test code and the BTreeFolder.py to figure out the API.

I have a few doubts to clarify:

In this method I tried to add two BTFs and an OOBTree:
def test3():
f = BTreeFolder2('sufest')
f2 = BTreeFolder2('somefolder')
f3 = BTreeFolder2('somefolder2')
f._setObject(f2.id, f2)
f._setObject(f3.id, f3)
uniq_id = f.generateId()
obT = OOBTree()
obT['Auth'] = {'a':1,'b':2}
f._setOb(uniq_id, obT) 
lst = f.objectMap()

return f._getOb(uniq_id)

Now the functions returns an error:
Traceback (innermost last):
  Module ZPublisher.Publish, line 115, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 41, in call_object
  Module Products.ExternalMethod.ExternalMethod, line 225, in __call__
   - __traceback_info__: ((), {}, None)
  Module /var/lib/zope2.9/instance/sandbox/Products/Test/Extensions/Tst.py, 
line 40, in test3
  Module Products.BTreeFolder2.BTreeFolder2, line 211, in _getOb
AttributeError: 'BTrees._OOBTree.OOBTree' object has no attribute '__of__'

I beleive this is because OOBTrees don't have a meta_type which the _getOb 
function tries to access. Enlighten me :)

Other methods like objectMap and getBatchObjectListing work fine though.

My question is how do we properly a store any item other than zope objects like 
strings,dicts or OOBTrees in a BTreeFolder2 and how to retrieve them back.

Zope seems interesting to work with but at times really confuses me especially 
acquisition concepts.   

Regards,
SZ


 life isn't heavy enough,it flies away and floats far above action



  Start your day with Yahoo!7 and win a Sony Bravia TV. Enter now 
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Re: [Zope] Learning to use a BTreeFolder2

2008-11-25 Thread Peter Bengtsson 
OOBTrees are created as attributes on zopeish objects (e.g. BTreeFolder2).
E.g.

class Stuff(BTreeFolder2):
 meta_type ='Stuff'
 def __init__(self, oid):
super(Stuff, self).__init__(oid)
self.people = OOBTree()

2008/11/25 Mr SZ [EMAIL PROTECTED]:
 Hi All,

 I am writing a product to manage the back end operations of users.I need to 
 store lots of user info.My first plan was to use ZSQL but then I read about 
 ZODB and more specifically OOBTrees and BTreeFolder2. My objective is to 
 store user related stuff on ZODB but not litter the ZODB but to instead 
 organize into folders. I read the test code and the BTreeFolder.py to figure 
 out the API.

 I have a few doubts to clarify:

 In this method I tried to add two BTFs and an OOBTree:
 def test3():
f = BTreeFolder2('sufest')
f2 = BTreeFolder2('somefolder')
f3 = BTreeFolder2('somefolder2')
f._setObject(f2.id, f2)
f._setObject(f3.id, f3)
uniq_id = f.generateId()
obT = OOBTree()
obT['Auth'] = {'a':1,'b':2}
f._setOb(uniq_id, obT)
lst = f.objectMap()

return f._getOb(uniq_id)

 Now the functions returns an error:
 Traceback (innermost last):
  Module ZPublisher.Publish, line 115, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 41, in call_object
  Module Products.ExternalMethod.ExternalMethod, line 225, in __call__
   - __traceback_info__: ((), {}, None)
  Module /var/lib/zope2.9/instance/sandbox/Products/Test/Extensions/Tst.py, 
 line 40, in test3
  Module Products.BTreeFolder2.BTreeFolder2, line 211, in _getOb
 AttributeError: 'BTrees._OOBTree.OOBTree' object has no attribute '__of__'

 I beleive this is because OOBTrees don't have a meta_type which the _getOb 
 function tries to access. Enlighten me :)

 Other methods like objectMap and getBatchObjectListing work fine though.

 My question is how do we properly a store any item other than zope objects 
 like strings,dicts or OOBTrees in a BTreeFolder2 and how to retrieve them 
 back.

 Zope seems interesting to work with but at times really confuses me 
 especially acquisition concepts.

 Regards,
 SZ


  life isn't heavy enough,it flies away and floats far above action



  Start your day with Yahoo!7 and win a Sony Bravia TV. Enter now 
 http://au.docs.yahoo.com/homepageset/?p1=otherp2=aup3=tagline
 ___
 Zope maillist  -  Zope@zope.org
 http://mail.zope.org/mailman/listinfo/zope
 **   No cross posts or HTML encoding!  **
 (Related lists -
  http://mail.zope.org/mailman/listinfo/zope-announce
  http://mail.zope.org/mailman/listinfo/zope-dev )




-- 
Peter Bengtsson,
work www.fry-it.com
home www.peterbe.com
hobby www.issuetrackerproduct.com
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