[Zope-dev] Python class and ZClass
Hi, I would like to subclass a Python class with a ZClass. I mean that my DTML document will declare ZClass and I would like to be able to access the method declared in the python class (parent of the ZClass). Does anybody knows how to do that ? PS : I read a paper call "SubClassing from Custom Python classes", but I did not understood everything, so if somebody can give me an example or the main steps to solve my problem... Thank you very very much Vincent ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] hmmm.. wierd permission issues with getPersistentItemIDs()...
Hi Steve, Thanks for the reply. Of course as soon as I reported this, I went away for a couple days and I haven't been able to check the list. It appears that the problem is that the BTreeItems object returned by getPersistentObjectIDs isn't currently allowed as an argument of 'in' by itself since it's not in the 'containerAssertions' dictionary defined in SimpleObjectPolicies.py and it doesn't have the magic property: '__allow_access_to_unprotected_subobjects__'. If you *sort* the BTreeItems object however, the dtml-in tag makes a copy of the items in the BTreeItems object as a simple List, and sorts that rather than destructively attempting to sort the original. The simple list is in containerAssertions, and is therefore allowed. I was wrong about the dtml-var "defaultRack.getPersistentItemIDs()" it's only dtml-in "defaultRack.getPersistentItemIDs()" that seems to cause the problem. The odd thing is that the method 'getPersistentObjectIDs' is correctly included in the definition of __ac_permissions__ in Rack.py, but as you point out, it returns a BTreeItems object that doesn't want to play nice with dtml-in... . Once possible solution would be to add an '__allow_access_to_unprotected_subobjects__' property to the BTreeItems object. I'm not sure who should do that. maybe Rack.py? For now.. I'll just sort the ids. ;-) thanks, -steve "Steve" == Steve Alexander [EMAIL PROTECTED] writes: Steve Steve Spicklemire wrote: Hi ZPatterns folks... ZPatterns-0.4.1snap1 Zope2.2.0-src I have a specialist with a defaultRack storing DataSkin subclassed ZClass instances with only persistent attribute providers. dtml-var "defaultRack.getPersistentItemIDs()" Steve When I call that, I get BTreeItems object at 869a5d8. To Steve get that list of IDs, I use an external method: Steve def get_persistent_ids(self): try: items = Steve self.defaultRack.aq_base.getPersistentItemIDs() return Steve map(lambda x: x, items) Steve except: import sys, traceback, string etype, val, tb = Steve sys.exc_info() Steve sys.stderr.write(string.join(traceback.format_exception(etype, Steve val, tb),'')) del etype, val, tb Steve I've tried something like your code, with no sheetproviders Steve in the rack. I can't reproduce your error. I'm using the Steve method as a Manager. or dtml-in "defaultRack.getPersistentItemIDs()" ... /dtml-in raise AuthorizationFailed dtml-in "defaultRack.getPersistentItemIDs()" sort ... /dtml-in works fine. What did I do now? ;-) Steve Line 318, Rack.py. The method getPersistentItemIDs has no Steve docstring. Is that still significant under the new security Steve model? Steve Does the user you're running the method as have the Steve permission "Access contents information" ? Steve Looks like you may have uncovered a Zope security bug in Steve dtml-in ... sort :-/ Steve How could we test this further? Steve -- Steve Alexander Software Engineer Cat-Box limited Steve http://www.cat-box.net Steve ___ Zope-Dev Steve maillist - [EMAIL PROTECTED] Steve http://lists.zope.org/mailman/listinfo/zope-dev ** No cross Steve posts or HTML encoding! ** (Related lists - Steve http://lists.zope.org/mailman/listinfo/zope-announce Steve http://lists.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Caching problems
Hi,
I have a problem with a class I wrote where I have a list as an
attribute of the class. When I append something to that list, it stays
there at first, but only until I restart Zope. It disappears (==is set
to the value I assigned to it in __init__) and reappears as well when
I hit reload a few times very quickly. Whenever I flush the cache it
disappears immediately. There seems to be no transaction registered by
Zope, because it doesn't show up under 'Undo'. I observed this both
thru a dtml page and a debugging function written in python.
I attached the code below, the method and attributes I'm talking about
are IEEShare.read_access_roles, IEEShare.write_access_roles and
IEEShare.add_user_access()
The problem exists with both Zope 2.2.0 and 2.2.1b1. I'm running
2.2.1b1 right now on a SuSE Linux 6.4 default installation. (standard libc,
threads etc.)
Both versions of Zope are compiled from source.
__doc__ = """IEEFolder product module."""
__version__ = '0.1'
import string
from Globals import HTMLFile,MessageDialog,Persistent
import OFS.Folder
import OFS.PropertyManager
import Acquisition
import AccessControl
from AccessControl import getSecurityManager
manage_addIEEFolderForm = HTMLFile('ieefolderAdd', globals())
def manage_addIEEFolder(self, id, title=None, REQUEST=None):
"""Add an IEE Folder to a folder."""
ob=IEEFolder()
ob.id=str(id)
if title:
ob.title=title
self._setObject(id, ob)
if REQUEST is not None:
return self.manage_main(self, REQUEST, update_menu=1)
def findProperty(ids, props, searchterm, path='', all=0):
"""Find a property
"""
result=[]
checkPermission=getSecurityManager().checkPermission
for obj in ids:
if hasattr(obj, '_properties') and checkPermission('Access contents
information', obj):
for md in getattr(obj, '_properties'):
propid=md['id']
if (all or (propid in props)) and \
(string.find(str(getattr(obj, propid)),searchterm) != -1):
result.append({'object': obj,
'id': path + obj.id,
'url': obj.absolute_url()})
if getattr(obj, 'isPrincipiaFolderish', None):
result.extend(findProperty(obj.objectValues(), props, searchterm, \
path=path+obj.id+'.', all=all))
return result
class IEEFolder(OFS.Folder.Folder,
Persistent,
Acquisition.Implicit,
AccessControl.Role.RoleManager,
OFS.PropertyManager.PropertyManager
):
meta_type = 'IEE Folder'
__ac_permissions__=(
('Read Access', ('manage_findPropertyForm', 'manage_findProperty',
'index_html', 'manage_main', 'manage_workspace',
'objectIds', 'objectValues', 'objectItems', '')),
('Write Access', ('manage_delObjects',)))
manage_workspace__roles__=('Read Access','Write Access')
manage_options = (
{'label': 'Folder View', 'action': 'index_html', 'image': 'folder-view'},
{'label': 'Search', 'action': 'manage_findPropertyForm',
'image': 'search'},
{'label': 'Undo', 'action': 'manage_UndoForm', 'image': 'undo'})
index_html = HTMLFile('index', globals())
manage_main = HTMLFile('index', globals())
manage_findPropertyForm=HTMLFile('findProperty', globals())
findPropertyResult=HTMLFile('findPropertyResult', globals())
manage_UndoForm=HTMLFile('undo', globals())
def filtered_objectIds(self):
map(lambda x: x.id, filter(lambda x:
getSecurityManager().checkPermission('Read Access', x), self.objectValues()))
def manage_findProperty(self, searchterm, props=[], allprops='all'):
"""Find a property."""
if type(props) is type(''):
props=[props]
if allprops == 'all':
allprops = 1
else:
allprops = 0
return self.findPropertyResult(self, result=findProperty(self.objectValues(),
props, searchterm, all=allprops), URL=self.absolute_url())
__doc__ = """IEEShare product module."""
__version__ = '0.1'
import nis,traceback
from Globals import HTMLFile,MessageDialog,Persistent
from Products.CARS.IEEFolder import IEEFolder
from Products.CARS.NisLogin import NisLogin
from Products.LoginManager.LoginManager import manage_addLoginManager
from Globals import HTMLFile
manage_addIEEShareForm = HTMLFile('ieeshareAdd', globals())
def manage_addIEEShare(self, id, title=None, REQUEST=None):
"""Add an IEE Share to a folder."""
ob=IEEShare()
ob.id=str(id)
ob.title=title
self._setObject(id, ob)
ob=self._getOb(id)
ob.manage_role('Read Access', permissions=('Read Access',))
ob.manage_role('Write Access', permissions=('Write Access',))
#manage_addLoginManager(ob, usource='NIS User Source')
if REQUEST is not None:
return
[Zope-dev] Funny bug in Zope?
I'm not quite sure if this is already reported or not, so I won't give much information on it (I've looked for something similar, but I haven't found it). I'm runnig Zope 2.2.0 under Linux. I have this product I've made myself - called TravelAgent. I add an instance of it to the Zope root-folder, which I call TravelAgent. Everything works fine. If I rename this instance to something that has less than five characters in it, something very fish starts to happen. I should also mention that in the index_html method's body-tag I have an background-element which displays somepic.gif. Now, if the instance is called f ex Trav (ie. less that five characters) and I try to render the index_html, it displays the background image correctly, but it also pukes out the gif in ASCII on top - and nothing else. This happens very consistently, unless I reload fast four, five times - then it display the whole index_html just fine. I rename back to Trave (ie. five characters or more) and everything is fine. I can reproduce this all the time. Strange, huh? ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Caching problems
You directly change a nonpersistence participant object. As stated in http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html : quote All sub-objects of persistent objects must be persistent or immutable. This rule is necessary because, without it, the persistence system would not be notified of persistent object state changes. Like most rules, this rule can be broken with care, as is done in the issue tracking system. A persistent object can use mutable non-persistent sub-objects if it notifies the persistence system that the sub-object has changed. It can do this in two ways. It can notify the persistence system directly by assigning a true value to the attribute _p_changed /quote so what I think you need is to tell the object wich has the list property that it has changed, coz he can't know it by himself if you list.append or list.extend or even list[0] = something. To do this you can: 1- set self._p_changed = 1 on the object after the change (append or something) 2 - assign self.list to itself so that the object knows a change has been made to that property. but mainly... RTFM ;-) On Wed, 16 Aug 2000, Bob Pepin wrote: Hi, I have a problem with a class I wrote where I have a list as an attribute of the class. When I append something to that list, it stays there at first, but only until I restart Zope. It disappears (==is set to the value I assigned to it in __init__) and reappears as well when I hit reload a few times very quickly. Whenever I flush the cache it disappears immediately. There seems to be no transaction registered by Zope, because it doesn't show up under 'Undo'. I observed this both thru a dtml page and a debugging function written in python. I attached the code below, the method and attributes I'm talking about are IEEShare.read_access_roles, IEEShare.write_access_roles and IEEShare.add_user_access() The problem exists with both Zope 2.2.0 and 2.2.1b1. I'm running 2.2.1b1 right now on a SuSE Linux 6.4 default installation. (standard libc, threads etc.) Both versions of Zope are compiled from source. -- "Sometimes I think the surest sign that intelligent life exists elsewhere in the Universe is that none of it has tried to contact us." Carlos Neves [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
