- Zope-Dev - Zope lists

Storing session objects in a ZODB
by Andy McKay 30 Jan '01

30 Jan '01

I want to store the session objects (from CoreSessionTracking) in the ZODB so that users can save preferences (set in a Session) and call them back later. Just thinking that the easiest way to something is to pickle it, but pickling it in the ZODB which then pickles it, seems daft. Someone suggested I could just _setObject into the ZODB, but don't I still need to make a class wrapper around this? Has anyone tried this? I couldn't spot anything in the CoreSessionTracking API that obvious... Cheers. -- Andy McKay.

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Re: [Zope-dev] ZDebug patch for 2.3.0
by Itai Tavor 30 Jan '01

30 Jan '01

Thanks! Good to have ZDebug back. But... it kills LoginManager, which uses an exception to render the login page. This patch will fix the problem: --- DTMLDebug.py.old Fri Sep 15 09:25:14 2000 +++ DTMLDebug.py Tue Jan 30 10:45:43 2001 @@ -217,6 +217,9 @@ elif exc_type is DTReturn: # Return normally. raise + elif str(exc_type) == 'LoginRequired': + # Don't interfere with LoginManager. + raise else: debugWithNamespace(section, namespace, None, info) finally: Chris Withers wrote: >The patch below got ZDebug working with Zope 2.3.0 for me. Hope I didn't >miss anything ;-) > >cheers, > >Chris ><snip patch> -- -- Itai Tavor -- "Je sautille, donc je suis." -- itai(a)optusnet.com.au -- - Kermit the Frog -- -- 'Supposing a tree fell down, Pooh, when we were underneath it?' -- -- 'Supposing it didn't,' said Pooh after careful thought. --

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LoginManager and ZPatterns
by morten＠esol.no 29 Jan '01

29 Jan '01

Hi fellow zopers, I don't know if it's a bug or feature, but whenever I try to access parental objects from a user object in python code, I can't seem to find anything. That is, whenever I call acl_users.getItem('user123').getParentNode() (the acl_users is a LoginManager instance) it returns None. But, if it's called from DTML, with exactly the same expression, it returns the containing object... Could someone shed some light on this? Thank you. -Morten

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Re: [Zope-dev] Re: Refresh and debugging product creation issues.....
by Shane Hathaway 29 Jan '01

29 Jan '01

Jaan Kaer wrote: > It seems that on page http://www.zope.org/Members/hathawsh/Refresh > is still only link to the old version (2000/05/15) of Refresh > product :-( Could you please put there also link to the version where you > are corrected the "multiple names in the product add list problem"? I took a good look at Refresh today and came up with new solutions to its issues. The meta_type list is fixed (the right way) and I found a way to safely and completely flush the ZODB caches so that even instances of products at the root folder can be refreshed. Check out version 0.2! http://www.zope.org/Members/hathawsh/Refresh/index_html > Many thanks for very useful product, with my hardware (AMD 486DX 100) is restarting > Zope a very time-consuming process. Although that is a good use for Refresh, I created it with the intentions of it being used even on production sites where restarting the server is to be avoided. Another interesting use: there is an issue with ZEO clients and product initialization; you can use Refresh to solve it. Feedback is appreciated. Shane

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How to avoid ConflictErrors ?
by morten＠esol.no 29 Jan '01

29 Jan '01

Hi zopers, I'm having problems with a product I'm developing. The product is part of the ZopeGUM package, the GUM product. If you have a look in gum.py in that product, you can see a method named _retrieve_messages, which can at times store enourmous amounts of objects and data in one transaction. Now, if I access the GUM instance at the same time as this method is being called, I may either get a ConflictError raised in the page, or in the Zope debug output. I've read all the posts I could find regarding ConflictErrors, and they mention that careful programming could help in avoiding these exceptions. I'm assuming that this applies only to whenever two threads are trying to *modify* the same object; and frankly, I can't see where I'm modifying any objects, unless modifying one object, an rfc822_message instance in a message_container instance also somehow modifies the message_container. Any idea what I'm doing wrong? Thanks & cheers, Morten

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Re: [Zope-dev] 2.3.0 release badness
by Adrian Hungate 29 Jan '01

29 Jan '01

Does the same occur if you serve using something else ('DTML Method', 'File', 'ZStyleSheet' etc) I have noticed problems with Netscapes handling of Text/CSS stylesheets. It appears that long or particularly complex stylesheets that can be (And here is the kicker) downloaded too quickly, do not seem to complete correctly and for me they have even resulted in Netscape locking up (Linux and Win32). Admitedly, my stylesheets were HUGE! :) - I was trying to break my ZSytleSheet product and was browsing the sheet using Netscape on the server. I don't know if this is related... Adrian...

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Re: [Zope-dev] 2.3.0 release badness boundary="------------F1F4CF9CD0D0AF0E5520717B"
by Dieter Maurer 29 Jan '01

29 Jan '01

richard(a)bizarsoftware.com.au writes: > This is a multi-part message in MIME format. > --------------F1F4CF9CD0D0AF0E5520717B > Content-Type: text/plain; charset=us-ascii > Content-Transfer-Encoding: 7bit Do you already know that we do not like MIME messages in this list? > I've just updated to 2.3.0 release using CVS. My CSS serving has > subsequently broken. The CSS serving worked fine with the CVS code from > 2.3.0b2. I didn't get to check b3 - we had a public holiday on Friday and > that meant that the one working day assigned to the b3 release was lost to > me (and _most_ other Australians). Anyway, that's a separate issue ... This was explained recently in this list. The list has a searchable archive. You will find there an URL to the precise description of the Netscape bug. Dieter

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Unable to clear proxy roles in Zope 2.3.0
by Dirksen 29 Jan '01

29 Jan '01

In Zope 2.2.x, one can clear the proxy roles for one method by unseleting all proxy roles. In Zope 2.3.0, this lets to this error: You must select one or more proxy roles. Is it a bug, or is it done in a different fashion? cheers Dirksen __________________________________________________ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/

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ZDebug patch for 2.3.0
by Chris Withers 29 Jan '01

29 Jan '01

The patch below got ZDebug working with Zope 2.3.0 for me. Hope I didn't miss anything ;-) cheers, Chris --- debugsecuritypolicy.py.old Sun Jan 28 21:59:23 2001 +++ debugsecuritypolicy.py Sun Jan 28 22:07:21 2001 @@ -89,7 +89,7 @@ __version__='$Revision: 1.4 $'[11:-2] from AccessControl import SimpleObjectPolicies -_noroles=[] +_noroles=SimpleObjectPolicies._noroles from AccessControl.PermissionRole import \ _what_not_even_god_should_do, rolesForPermissionOn @@ -99,7 +99,7 @@ class DebugSecurityPolicy: def validate(self, accessed, container, name, value, context, - None=None, type=type, IntType=type(0), DictType=type({}), + roles=_noroles, None=None, type=type, IntType=type(0), DictType=type({}), getattr=getattr, _noroles=_noroles, StringType=type(''), Containers=SimpleObjectPolicies.Containers, valid_aq_=('aq_parent','aq_explicit')): @@ -116,7 +116,8 @@ ############################################################ # Try to get roles - roles=getattr(value, '__roles__', _noroles) + if roles is _noroles: + roles=getattr(value, '__roles__', _noroles) if roles is _noroles: @@ -174,7 +175,14 @@ value=container # Short-circuit tests if we can: - if roles is None or 'Anonymous' in roles: return 1 + try: + if roles is None or 'Anonymous' in roles: return 1 + except TypeError: + # 'roles' isn't a sequence + LOG('Zope Security Policy', PROBLEM, "'%s' passed as roles" + " during validation of '%s' is not a sequence." % ( + `roles`, name)) + raise # Check executable security stack=context.stack

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Zope on OpenBSD 2.8 problem solved
by Alexander Limi 29 Jan '01

29 Jan '01

Hi, For those of you wishing to run Zope on OpenBSD 2.8, here is a solution. The reason it doesn't work in the first place is a thread bug in the OpenBSD 2.8 release version. The solution is to use the libc_r from OpenBSD 2.7 for the Zope instance. Thanks to Jason Ish for the howto, I thought I would rewrite it to be more generic and post it to the lists. So, here we go: Python on OpenBSD 2.8 uses /usr/lib/libc_r.so.3.1. libc_r.so.3.1 is from 2.8, libc_r.so.3.0 is from 2.7 and will work. So what we do is to copy the old libc file (if you don't have it, mail me and I'll send it to you) into a directory in the Zope install dir, and add that to the path. Then we rename the old file so the system thinks it is the curent version. In this example, I assume your Zope install is in /usr/local/zope. First, we copy the old library into our Zope dir, and rename it: cp /usr/lib/libc_r.so.3.0 /usr/local/zope/libc_r.so.3.1 Then you should add something like this to the top of your "start" script: export LD_LIBRARY_PATH=/usr/local/zope Start Zope, and you will find that it works fine now. Zope also works fine in the CURRENT tree of OpenBSD, so presumably it will work out-of-the-box on OpenBSD 2.9. This is the safest way of getting it to work at the moment. Happy OpenBSD'ing :) Alexander Limi.

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