January 2002 - Zope-Dev

LDAP on Zope 2.5.0b2
by Peeyush Garg 05 Jan '02

05 Jan '02

Hi, Has anybody successfully installed LDAPUserFolder on Zope2.5.0b2 (on Linux). When I compile python-ldap module and install it alongwith LDAPUserFolder, it shows as a installed product in the Zope management screen, but when I try to connect to the LDAP server (openldap 2.0.18) also running on the same machine, it says 'connection settings not ok...'. Interestingly, when I install LDAPUserFolder on Zope 2.4.3 running on a WinNT 4.1 workstation and use the same connection settings, it connects successfully and I'm able to query the LDAP database. Any ideas why..?? ~Peeyush.

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FreeBSD, Zope, and Python 2.1
by Matthew T. Kromer 04 Jan '02

04 Jan '02

For what it's worth: Today I helped Jens track down a problem under FreeBSD where Zope was crashing rendering a page which rendered successfully on other systems. It turns out that the default stack size for a thread under FreeBSD is 64K, and that's not enough stack space to render this particular page of his (a Tracker page) -- most likely due to changes with how the RestrictedPython compiler is used/invoked by DTML processing, since this represents a big change from Zope 2.3. The solution we used was modifying Python/thread_pthread.h and the PyThread_start_new_thread function; specifically, instead of using a (pthread_attr_t *) NULL, we made a new attribute instead: pthread_attr_t pta; pthread_attr_init(&pta); pthread_attr_setstacksize(&pta, (1<<17)); and using &pta in the thread creation function rather than NULL. Recompiling Python 2.1 with changes gives it a 128K stack per thread, which seemed sufficient to render the Tracker page in question. Does anyone know of a better way to tune thread stack sizes on FreeBSD?

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security.declareProtected doesn't always work?
by Martijn Faassen 04 Jan '02

04 Jan '02

Hi there, I have some issues with using declareProtected() outside product classes (deriving from ObjectManager or SimpleItem). An external method example that _does_ work, taken from the ZDG: import Globals import Acquisition from AccessControl import ClassSecurityInfo class Book(Acquisition.Implicit): def __init__(self, title): self._title=title # Create a SecurityInfo for this class security = ClassSecurityInfo() security.declareObjectPublic() security.declarePublic('getTitle') def getTitle(self): return self._title Globals.InitializeClass(Book) # The actual external method def GetBooks(self): books=[] books.append(Book('King Lear')) books.append(Book('Romeo and Juliet')) books.append(Book('The Tempest')) return books Now replace the line "security.declarePublic('getTitle')" with something like "security.declareProtected('View', 'getTitle')", and suddenly nobody is allowed to call getTitle() on a Book object anymore. This doesn't only occur in external method code, but also in product code, which is where I ran into it. Take for instance this class: class TOCEntry(Acquisition.Implicit): security = ClassSecurityInfo() security.declareObjectPublic() def __init__(self, id): self.id = id security.declareProtected('View', 'render') def render(self): """Render entry. """ return self.id Globals.InitializeClass(TOCEntry) 'render()' can now never be called from a DTML method or a ZPT template, while using 'security.declarePublic('render') does work. One gets errors like this: """ Error Type: Undefined Error Value: You are not allowed to access render in this context not found in 'entry/render', at line 8, column 3 """ which doesn't look very grammatical either. :) I haven't been able to figure out what causes the difference; classes that are initialized with Zope don't seem to have this problem, but this little class does. I've tried inheriting from Persistent or SimpleItem.Item but that doesn't seem to make any difference.. So what's going on? Am I missing something? If so, where is this documented? Martijn

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Python Conference
by Joya Subudhi 03 Jan '02

03 Jan '02

Python 10 Conference News Python 10 is just around the corner. Register today and save with EARLY BIRD REGISTRATION RATES. This early bird offer ends on January 7, 2002. To register, go to http://www.python10.org/p10-regInfo.html The Python 10 GROUP RATE at the Hilton Alexandria Mark Center is only guaranteed until January 11, 2002. For information on room rates and reservation procedures, please go to http://www.python10.org/p10-hotelInformation.html Feature Presentation: Developers' Day opens with the "State of the Python Union" Address by Guido van Rossum Birds-of-a-Feather: Python 10 is now calling for your Birds-of-a-Feather (BoF) submissions. To propose a BoF, please go to: http://www.python10.org/p10-callBoFs.html The Tenth International Python Conference, February 4 - 7, 2002 The Hilton Alexandria Mark Center, Alexandria, Virginia http://www.python10.org Silver Sponsor: Hostway Corporation: http://www.hostway.com Silver Sponsor: New Riders Publishing: http://www.newriders.com Exhibitor: Archaeopteryx Software: http://www.archaeopteryx.com

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03 Jan '02

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Anyone know how to pre-expand a certain branch of a dtml-tree?
by Craeg K. Strong 01 Jan '02

01 Jan '02

Hello: I want a certain branch of my dtml-tree to be pre-expanded whenever the webpage that contains the tree is displayed. My dtml-tree is quite simple; I use the usual subordinate folder structure setup: <dtml-tree single=0 name="catalog" branches="objectValues"> TIA! --Craeg

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Does anyone know how to suppress display of +/- signs on a dtml-tree?
by Craeg K. Strong 01 Jan '02

01 Jan '02

Hello: I want to display a dtml-tree always expanded, with no controls visible for contracting (basically, an indented list of links). I set the tree to always expand via the following: <dtml-call expr="REQUEST.set('expand_all', 1)"> <dtml-tree single=0 name="catalog" branches="objectValues"> But I can't figure out how to remove the little minus signs (-) from the branches. Has anyone done this? TIA, --Craeg

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Re: [Zope] relative path to objects in <dtml-var>
by Lennart Regebro 01 Jan '02

01 Jan '02

From: "Roy Mathew" <roymath(a)yahoo.com> > How would I use a pathname comprising more than one element in a > dtml-var expression. You put the path to the image inside quotes, and have dots as path separators: <dtml-var "Images.x_gif"> And of course, then you can't use filenames with dots, and no, it won't break any browsers that I know of.

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