[Zope-dev] Weird thing happend with Pack
Hi.
I was fiddling around with my Zope-instance, and decided to Pack the
database, I had just deleted a lot of objects and the Data.fs was reported
to be about 15MB large; which I knew couldn't be true.
Under Control_Panel/Database I pressed the "Pack" button with "days older
than" set to '0'. Ahh, the Data.fs became about 500k, that's more like
it. For some odd reason, I decided to enter '3' at "days older than"
and press "Pack". Dunno why.
After I did that it got ugly. Now it reported that the Data.fs was
about 400k. Hm, I thought, and checked the var/ directory. It was
smaller... strange. I decided to check if the rest of my site was
still ok, but it wasn't. When got into localhost/manage every object
had their titles changed to 'L'. A bit odd. Very inconvinient. :)
Hpmf, I thought while I cleverly scratched my head. I tried to enter
one of these 'L'-ified objects, but now it didn't respond at all. I
tried to kill the python process, but it had already died. Tried to
start it, this is what I got:
Traceback (innermost last):
File "z2.py", line 436, in ?
exec "import "+MODULE in {}
File "string", line 1, in ?
File "/usr/share/zope/lib/python/Zope/__init__.py", line 130, in ?
OFS.Application.initialize(c)
File "/usr/share/zope/lib/python/OFS/Application.py", line 171, in initialize
app.Control_Panel.initialize_cache()
File "/usr/share/zope/lib/python/ZODB/Connection.py", line 391, in setstate
p, serial = self._storage.load(oid, self._version)
File "/usr/share/zope/lib/python/ZODB/FileStorage.py", line 584, in load
try: return self._load(oid, version, self._index, self._file)
File "/usr/share/zope/lib/python/ZODB/FileStorage.py", line 560, in _load
pos=_index[oid]
KeyError: e
(actually, it didn't say KeyError: e, but some odd character I don't
know how to reproduce.)
To fix it I entered the var/ directory, renamed the Data.fs to df-old
and renamed the Data.fs.old to Data.fs. Started the Zope-process and
everything was fine.
Anyone seen this before? It could maybe resemble the bug 1244
(URL:http://www.zope.org:8080/Collector/1244), but I don't think
so. The strange thing is that it (Data.fs) got smaller when I defined
"days older than" to be '3', _after_ having set it to '0'.
Versions:
Red Hat Linux 6.1 (2.2.12-20)
Zope version 2.1.2
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[Zope] Confusing sqlvar error message
Today, I analysed a confusing error message from "dtml-sqlvar".
SQL query template:
dtml-sqlvar "_[name]" type=string
reported: "missing input variable: _[name]"
Of cause, I did not expect that such an input variable should
be necessary and I suspected the DTML parser not to
see the "..." around "_[name]".
After analysis, the explanation was simple:
SQLVar.render is a bit stupid in its error handling:
try:
expr=self.expr
if type(expr) is type(''): v=md[expr]
else: v=expr(md)
except:
if args.has_key('optional') and args['optional']: return 'null'
raise 'Missing Input', 'Missing input variable, em%s/em' % name
This error handling is only senseful for "type(expr) == type('')",
i.e. for plain variable access.
For true expressions, the original exception would be
*much* more useful.
In my case, unwrapping the "try ... except ..."
produced "KeyError: FOLLUP_UP",
an obvious type (FOLLOW_UP rather than FOLLUP_UP).
Thus, the above exception handling should become:
except:
if args.has_key('optional') and args['optional']: return 'null'
if type(self.expr) != type(''): raise
raise 'Missing Input', 'Missing input variable, em%s/em' % name
I will put it into the collector.
Dieter
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[Zope] Zope in single thread mode during DTML rendering
A collegue of mine succeeded today to implement an infinite DTML loop. That happens ... However, during this loop, Zope did not respond to any request. Effectively, it was in single thread mode. Zope 2.1.6 Binary Distribution for Sparc Solaris 2.6 ZOracle DA, DCOracle, Oracle 8.1.6 After several minutes, Zope reported an "infinite recursion in document template" and the world awoke from its sleep. I was unable to reproduce this at home, though: Zope 2.1.6 Source Distribution on Linux 2 No database connections. Hugh, I have been lying: I just removed the "-D" from the Linux start script, and Zope blocked during the infinite loop. The behaviour is not related to the "-D" set or unset. It just blocks sometimes and at other times, it does not. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] ZCatalog attachments?
Simon Coles writes: We have binary files stored in Zope, for example Word documents (but could be any of a variety of document types). We would like to be able to index and search the contents of these files using ZCatalog. So if a Word file contains the word "Fred", then any search for "Fred" would include that file in the list of documents returned. Someone else already told you, that you must create a parameterless method (it need not necessary be named "PrincipiaSearchSource") that returns the files content. You may not need to keep the rendered version around but may be able to extract the plain text on demand. I think, there is a "word.dll" that provides access to MS Word from applications. Alternatively, you could control Word via COM. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Less than helpful traceback
Spicklemire, Jerry writes: Any thoughts about how to find out what the erro message (below) means? If I could just find out what exactly is not being found, it would help alot, but there's no hint. Zope has encountered an error while publishing this resource. Resource not found Troubleshooting Suggestions For more detailed information about the error, please refer to the HTML source for this page. For unknown (but strange) reasons, at least earlier Zope versions (up to 2.1.6), sometimes place the URL of the missing resource into an HTML comment. Therefore, you will not see it in rendered problem report, only in its HTML source. Thus, follow the hint: tell your browser you want to see the HTML source of the error report. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Solution Suggestions?
Craig writes: ... special "Tips" objects in Zope ... It seems, this is an ideal task for a Catalog Aware ZClass. On zope.org, you will find tutorials for ZClass and ZCatalog. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Python Product Tutorial
On Fri, 4 Aug 2000, Loren Stafford wrote: I don't know of any tutorial. ZScheduler creates a container (a subclass of Catalog in fact), so you might use that code as a starting point. It doesn't put other objects in the container, tho. Thanks, but I'm really interested in how I would add other objects. I guess if I dig deep enough, I'll find it. :-) ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] REPOST: README.txt Tab
On Fri, 4 Aug 2000 [EMAIL PROTECTED] wrote:
I'll re-ask the question:
How do I get the README tab to appear in a product?
In the Squishdot Product I discovered this:
Readme = Document('', __name__='')
Readme.__roles__ = None
This one seems to add a README tab. If you have a README.txt file in your
Products directory it displays it.
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[Zope] Using MailHost with an SMTP server that wants authentication
Hi Zopers Looking at the attributes of the dtml-sendmail tag, I don't see any way of conveying authentication data to the smtphost. Our setup here (using Exchange) requires a username/password to send. Any way of coping with this? -- Jean Jordaan --technical writer--Mosaic Sofware ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] riddle me this Batman, coded copy/paste syntax?
The Zope quick reference lists the following methods for the stock folder object: manage_copyObjects(self, ids, [REQUEST, RESPONSE]) manage_cutObjects(self, ids, [REQUEST]) manage_delObjects(self, [ids, REQUEST]) manage_pasteObjects(self, [cb_copy_data, REQUEST]) For the life of me I can't get copy|cut and paste to work even for the simplest of examples. I've tried snippets like the following (embedded within a DTML method in a folder) but to no avail: dtml-call "manage_copyObjects(['subobjectid']" dtml-call "manage_pasteObjects()" dtml-call "manage_copyObjects([_['subobjectid']])" dtml-call "manage_pasteObjects()" Can someone shed some light on my misunderstanding? Cheers, Darran. ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] Troubles with ZOracleDA successfully resolved
All the problem was an permissions issue; Pedro Vega ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] Python Class trickyness
Good evening. I know how to make a Python Class, which is a container. But how do I make another Class which can only be added from the container-class I have created. Know what I mean? The last class should only show up in the "Available Objects"-list if the user is in a instance of the first class. Did this make any sense? Thanks for any answers. :-) ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] (Fwd) Re: [Zope] Pluggable brains aren't seen by first-nnn in - SOLUTION
On 4 Aug 2000, at 22:10, Dieter Maurer wrote: Brad Clements writes: However first-eventday is ALWAYS true, however when I print dtml- eventday; the output value is always the same for each row, so first- eventday shouldn't be true on any row except the first. Almost surely, the "in" tag does not call a callable object (because it does not expect, they could be callable). You, therefore, get the method itself. It is identical for all records. So true, the solution is to define an __init__ class in the brain class, then use that to populate "self". class PackageEvent: """Package Event Pluggable Brain""" def __init__(self): """initialize""" self.__dict__['eday'] = self.eventday() def eventday(self): return DateTime(apply(time.mktime,self.eventtime.tuple()[:3]+(0,0,0,0,0,-1 ))) Now 'first-eday' works. Brad Clements,[EMAIL PROTECTED] (315)268-1000 http://www.murkworks.com (315)268-9812 Fax netmeeting: ils://ils.murkworks.com AOL-IM: BKClements ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] DA threading issues (was: server instability: ZODB corruption?)
If I'm running current stable versions of Zope and Zope-MysqlDA, do I need to consider threading issues or are these safely abstracted away in the DA? "Luis Cortes" [EMAIL PROTECTED] writes: It may just be the version of Zope you have ( with regard to the Thread problem ) there exists a version of zope that was known to cause the thread death problem. You might want to check the patches or upgrade to a good version. I'm running the Debian frozen release, i.e. 2.1.6 with security patches. Do you have any specific references on the thread problem? I find nothing on it in the changelogs I've found. Do I need to go to 2.2.0 for this? A seach on 'threading problem' turns up a hornet's nest of deep technical shit. Most of those mails are a year old, is this still an issue? As a developer, do I need to understand threading issues when developing database accessing products, or may I safely assume that threading, locking and transaction semantics are handled between the Database Adapter and Zope itself? I found a mail that says I should run Zope single-threaded when using MySQL: http://lists.zope.org/pipermail/zope/1999-July/006487.html Checking my installation, I find I have no threading option activated, which means I'll be running the default number of 4 threads. What will my server performance look like if I reduce this to 1 thread? Not that I'm having such a wonderful performance now, having my pager go off every hour :-( Is there a way to allocate different threads to different SiteRoot virtual websites, so I can lock a single site in a single thread but let my installation as a whole still retain some multi-threading performance? :*CU# -- ***Guido A.J. Stevens ***mailto:[EMAIL PROTECTED]*** ***Net Facilities Group***tel:+31.43.3618933*** ***Postbus 1143***fax:+31.43.3560502*** ***6201 BC Maastricht ***http://www.nfg.nl *** Cyberspace is portrayed as some strange realm inside the network, in a theoretical realm, or in some utopia. The concept of being-in-the-world brings us back to the significance of everyday involvement in keyboards, desks, monitors, cables, workstations, and practices... [Coyne, ISBN 0-262-03228-7, p.168] ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] LoginManager and ZPatterns - Sparse Install Docs, Help.
Zopistas, Maybe I'm making this harder than it needs to be. I want to set up a membership system for the site I am developing with Zope. I do not want to "restrict" any part of the site - instead I want a user to login (at their convenience) and then extend the "menu" options based on their group membership. If a user is not logged in - no problem, they just won't be able to view the advanced options - they'll still be able to surf the site (I want to maintain my user list in an external database as well). What is the best tool in Zope to accomplish this? After searching the site, I find there are several products - ACL Users, GUF, and LoginManager. Is GUF deprecated (The intro tends to give me this feeling)? Is LoginManager the way to go? It also appears GUF is more tailored toward restrictive authentication (I've already perused the "Using GUF with an SQL Database" how-to). I want a user to login (via HTML form/cookie) whenever they like, and get presented with additional menu options (based on their AUTHENICATED/GROUP status). Not have them try to access a "restricted" page (or type "manage") and get a basic authentication login box to get in. As far as LoginManager itself is concerned, I assume it requires ZPatterns. However, the Zpatterns install instructions are *very sparse.* How do I get the thing set up? Here's verbatim from the ZPatterns docs: - After unpacking the ZPatterns product, you will need to build this [c] extension using the included Setup file in the ZPatterns directory. - How do I use the "Setup" file?? With the command "python Setup"? It doesn't say *how* to use it. - Please follow the standard procedures for building a Python module on your platform. (On Unix-ish systems, this usually consists of copying a Makefile.pre.in to the directory, then doing a make -f Makefile.pre.in boot followed by make. - What are these standard procedures?? I built Python itself with "configure|Make|Make install". Where do I get this "Makefile.pre.in" file in the first place, from my Python src/build directory?? Correct me if I'm wrong, but there's usually some kind of script file to run that get's things going, or a "configure" script. I find none of this in the lib/python/Products/ZPatterns directory after I untarred it. So, I'm basically stumped. It doesn't appear GUF will do what I need, and I have failed on multiple attempts to get Loginmanager/ZPatterns installed. If someone could point me in the right direction on this I sure would appreciate it. Thanks much, -Darin Lee ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
RE: [Zope] Zope 2.2 under Debian (Woody) broken?
It would seem to be broken you might want to contact the package maintainer. I think it's Glyph Lefkowitz? -Original Message- From: Pedro I. Sanchez [mailto:[EMAIL PROTECTED]] Sent: Saturday, August 05, 2000 10:39 PM To: [EMAIL PROTECTED] Subject: [Zope] Zope 2.2 under Debian (Woody) broken? Hello, I installed zope 2.2.0-1 from the Debian (Woody) distribution. No problems are reported during the installation but when I try to access http://localhost:9673/ I get the following error: Zope Error Zope has encountered an error while publishing this resource. Error Type: TypeError Error Value: unexpected keyword argument: validated_hook The same happens when I try to access the management menus. Is the Woody package broken? Any ideas? Thank you, -- Pedro ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev ) ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope 2.2 under Debian (Woody) broken?
Did u upgrade an existing zope instance with the new distribution, or was it a clean install? Did you install the SiteAccess product? This sounds like the error you get with an old SiteAccess object in the new zope2.2. You need to upgrade to the new SiteAccess. "Pedro I. Sanchez" wrote: Hello, I installed zope 2.2.0-1 from the Debian (Woody) distribution. No problems are reported during the installation but when I try to access http://localhost:9673/ I get the following error: Zope Error Zope has encountered an error while publishing this resource. Error Type: TypeError Error Value: unexpected keyword argument: validated_hook The same happens when I try to access the management menus. Is the Woody package broken? Any ideas? Thank you, -- Pedro ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev ) -- Terry Kerr ([EMAIL PROTECTED]) Adroit Internet Solutions Pty Ltd (www.adroit.net) Phone: +613 9563 4461 Fax: +613 9563 3856 Mobile: +61 414 938 124 ICQ: 79303381 ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope 2.2 under Debian (Woody) broken?
Thank you for the hint. I had purged my old zope (dpkg --purge) but it seems something was still there hanging around. I did an "rm -rf /var/lib/zope /usr/lib/zope" and reinstalled zope and it worked! I then tried to install the package "zope-siteaccess" from Woody but it depends on zope (= 2.0.0-2) which is not available :| I'm sort of new to zope so may I ask, Do I need this "zope-siteaccess" package from Woody? Thank you, Terry Kerr wrote: Did u upgrade an existing zope instance with the new distribution, or was it a clean install? Did you install the SiteAccess product? This sounds like the error you get with an old SiteAccess object in the new zope2.2. You need to upgrade to the new SiteAccess. "Pedro I. Sanchez" wrote: Hello, I installed zope 2.2.0-1 from the Debian (Woody) distribution. No problems are reported during the installation but when I try to access http://localhost:9673/ I get the following error: Zope Error Zope has encountered an error while publishing this resource. Error Type: TypeError Error Value: unexpected keyword argument: validated_hook The same happens when I try to access the management menus. Is the Woody package broken? Any ideas? Thank you, -- Pedro ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev ) -- Terry Kerr ([EMAIL PROTECTED]) Adroit Internet Solutions Pty Ltd (www.adroit.net) Phone: +613 9563 4461 Fax: +613 9563 3856 Mobile: +61 414 938 124 ICQ: 79303381 ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope 2.2 under Debian (Woody) broken?
You only need the siteaccess product if you wish to server multiple domains from one zope instance. "Pedro I. Sanchez" wrote: Thank you for the hint. I had purged my old zope (dpkg --purge) but it seems something was still there hanging around. I did an "rm -rf /var/lib/zope /usr/lib/zope" and reinstalled zope and it worked! I then tried to install the package "zope-siteaccess" from Woody but it depends on zope (= 2.0.0-2) which is not available :| I'm sort of new to zope so may I ask, Do I need this "zope-siteaccess" package from Woody? Thank you, Terry Kerr wrote: Did u upgrade an existing zope instance with the new distribution, or was it a clean install? Did you install the SiteAccess product? This sounds like the error you get with an old SiteAccess object in the new zope2.2. You need to upgrade to the new SiteAccess. "Pedro I. Sanchez" wrote: Hello, I installed zope 2.2.0-1 from the Debian (Woody) distribution. No problems are reported during the installation but when I try to access http://localhost:9673/ I get the following error: Zope Error Zope has encountered an error while publishing this resource. Error Type: TypeError Error Value: unexpected keyword argument: validated_hook The same happens when I try to access the management menus. Is the Woody package broken? Any ideas? Thank you, -- Pedro ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev ) -- Terry Kerr ([EMAIL PROTECTED]) Adroit Internet Solutions Pty Ltd (www.adroit.net) Phone: +613 9563 4461 Fax: +613 9563 3856 Mobile: +61 414 938 124 ICQ: 79303381 -- Terry Kerr ([EMAIL PROTECTED]) Adroit Internet Solutions Pty Ltd (www.adroit.net) Phone: +613 9563 4461 Fax: +613 9563 3856 Mobile: +61 414 938 124 ICQ: 79303381 ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] Sybase Thread
Hi,I just wonder if anyone can help me with my problem. Recently, I've been working on creating a ZOPE product which requires periodic access to my Sybase. I have created a thread process using the Threading module. There is no problem of periodically wake up the thread and print something to the screen. So, I guess I have no problem with thread programming under ZOPE. However, when I add some database related routines to the thread, problems started to occur. I sometimes got '... not connected to the database'. When I did an SQL 'update', nothing has been updated on the database server when I actually looked into the database using isql. After a whole day of trial error, now I've got 'ZOPE Memory Error'! I just wonder what has gone wrong. I really have no clue and my deadline is pressing :(1) I want to know what is the proper way of using thread under ZOPE.2) Is there any critical limitation of SybaseDAv2?3) Can SybaseDAv2 Threading live together happily?4) What the role of ZODB in such situation?Thanks a million if anyone can help!Regards,Nick
Re: [Zope] Precondition
On Fri, Aug 04, 2000 at 10:11:55PM -0400, R. David Murray wrote: On Fri, 4 Aug 2000, RC Compaan wrote: What does the "Precondition" property of the file class refer to? As far as I can tell from a quick scan of the source, the precondition is an object that is called just before the file object is rendered. It can raise an exception, in which case the object will not get rendered. I could swear I read that documented somewhere, but I can't find it. Someone should submit a doc patch for the API help pane. I'd do it, but I haven't gotten around to learning how the help system works yet so I don't know what file to patch grin. Precondition Allows you to specify a precondition for the File. A precondition is a method or document which is executed before the File is viewed or downloaded. If the precondition raises an exception then the File cannot be viewed. This is from the Help page presented when you click the 'help' button on the 'Edit' tab of a 'File' object. -- Martijn Pieters | Software Engineermailto:[EMAIL PROTECTED] | Digital Creations http://www.digicool.com/ | Creators of Zope http://www.zope.org/ | ZopeStudio: http://www.zope.org/Products/ZopeStudio - ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
