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Cannot save Version
by Jentsch, Peter 15 Aug '00

15 Aug '00

Hello! I created and logged in to a version object on my Zope-Site to do some extensive remodelling. When I tried to commit the changes, Zope responded with the following error: Error Type: KeyError Error Value: %} [...] Traceback (innermost last): File /opt/Zope-2.0.1-2/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /opt/Zope-2.0.1-2/lib/python/ZPublisher/Publish.py, line 179, in publish File /opt/Zope-2.0.1-2/lib/python/Zope/__init__.py, line 201, in zpublisher_exception_hook (Object: Fake) File /opt/Zope-2.0.1-2/lib/python/ZPublisher/Publish.py, line 169, in publish File /opt/Zope-2.0.1-2/lib/python/ZODB/Transaction.py, line 237, in commit File /opt/Zope-2.0.1-2/lib/python/ZODB/DB.py, line 557, in commit File /opt/Zope-2.0.1-2/lib/python/ZODB/FileStorage.py, line 368, in commitVersion (Object: /dmz-inter03/opt/Zope-2.0.1-2/var/Data.fs) KeyError: (see above) where %} was preceded by 6 nullbytes. I'm still able to access the version, so I could reconstruct the changes after discarding the version, but actually I'd rather find a way to *save* the changes. Thanks Peter

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Administrator Guide
by Stephan Goeldi 15 Aug '00

15 Aug '00

On which URL is the Administrator Guide for Unix? -goe- ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com

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Re: [Zope] Seeking Zope Volunteers
by Dieter Maurer 15 Aug '00

15 Aug '00

Andrew Kenneth Milton writes: > +-------[ Lyno Sullivan, Candidate ]---------------------- > | Greetings, > | > | My name is Lyno Sullivan and I am the endorsed Independence Party (see > > [ snip ] > .... > And you are now Lyno Sullivan, Spammer and in violation of your own laws. I would not be that hard. I think political support is essential for the free software movement. I see this in Europe where the European Commission prepares to make software and business rules patentable -- a nightmare for free software and free look&feel. Therefore, it is not bad for the free software movement to support the right politics. I, personnally, do not mind *one time* announcements of the above kind. Dieter

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Adding new News items using Yihaw
by Meaghan Aldridge 15 Aug '00

15 Aug '00

I am a Zope Newbie, and have been creating a company Intranet using Zope, and have stumbled across a problem that has me absolutely stumped! I have created a basic Web Interface using the Yihaw Product, and in this, I have added News Items. To search this, I use ZCatalog, which works quite well. The aim of this is to have a message board that authorised users can add and delete messages from. So far, the only way that I have found to add messages, is to actually add a new "Yihaw News" product from the Zope Management Interface. What I want to happen is that I can have a link to a page that displays a form with one field with the message to be displayed, and perhaps another field with a brief title. (The other fields, being the date and the name of the person who posted the message, I will have automatically, using the datetime function, and the authorised_user function.) This then generates itself into a Yihaw News item. Does anyone know how I could achieve this, or perhaps a work around for this? Thanks, Meaghan

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Re: [Zope] Implementing a login form instead of BASIC authentication
by Dieter Maurer 15 Aug '00

15 Aug '00

Meeting Maker Webmaster writes: > I am currently looking into implementing a login form to replace the > standard BASIC authentication. Have a look at GUF or the new LoginManager. They do something similar to what you want. Either, you can use them directly, or learn how they work and realize your own solution. Dieter

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"Computed" variable access (was: [Zope] use properties to get an object with dtml-var)
by Dieter Maurer 15 Aug '00

15 Aug '00

Gerard Metrailler Jr. writes: > Hello, > > I am trying to get the following more generic. > > <dtml-var "content.whos_who.gmetrail.real_name"> > > In that case, content and whos_who are folder, gmetrail is a ZClass I > created which derivates from Image and real_name is a property of that object. > > What I am trying to do is getting something like: > > <dtml-var "user_info + REQUEST.AUTHENTICATED_USER + real_name"> where > user_info is a property that I defined in / You do not want to access a fixed variable but want the variable to be accessed computed in some way. Computed variable access is provided by "_[expression]" Sometimes, you must use: "_.getitem(expression)" Both forms evaluate "expression" into a variable name and look it up in the namespace resulting in an object. The first form calls the object, if it is callable, and returns the result of this function call. The second form always returns the object itself without calling it. For a DTML document/method "calling" means rendering, thus the result is a string. There is a related need: computed attribute access. Here, an attribute to be accessed is not fixed but must be computed. You would use "_.getattr(object,expression)" in this case. Dieter

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Re: [Zope] Problem with nested dtml-in
by Dieter Maurer 15 Aug '00

15 Aug '00

Bill Welch writes: > I'm having trouble with nested dtml-in. The outer ZSQL returns the > coordinates of a zip code as zlat and zlong. The inner ZSQL takes > zlat and zlong as well as Range and Otype as arguments. > > When I run it I get: > Error Type: Bad Request > Error Value: ['zlat', 'zlong'] This is an FAQ: comes up at least twice per month in this list (there is a searchable archive supported by NIP (thank you, NIP)): Z SQL methods do not look in the namespace, only in the REQUEST object (provided there are no keyword parameters). You can use: <dtml-call "REQUEST.set('zlat',zlat)"> <dtml-in SQLMethod> or <dtml-in "SQLMethod(zlat=zlat)"> Dieter

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Re: [Zope] Persistence.py does not define Persistent
by Dieter Maurer 15 Aug '00

15 Aug '00

Skip Montanaro writes: > > I'm trying to publish my own module with ZServer (from Zope 2.2.0). I get > the following traceback: > > .... > from Persistence import Persistent > ImportError: cannot import name Persistent > > When I look at lib/python/Persistence.py, all I see is a copyright notice > and the following short doc string: > > """Provide access to Persistent and PersistentMapping > > This avoids dependency on the database package name. > """ > > I can't find a definition of an object named Persistent (probably ought to > be a class or ExtensionClass, based upon the usage I saw) anywhere in the > Zope 2.2.0 tree. "Persistence" is only a "placeholder" module that gets filled by the really used Object Database package (ZODB, BoboPOS2, BoboPOS3, ...) that implements persistence. For the current Zope, "ZODB/__init__.py" fills this module with "cPersistence.Persistent" and "PersistentMapping". By the way, Andrew Kuchling works on separate packages for various Zope parts. I think, ZODB is one of this packages. There was an announcement in zope-dev. Dieter

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Re: [Zope] problems connections to database
by Dieter Maurer 15 Aug '00

15 Aug '00

Tom Deprez writes: > Hi, > > I get a strange error here. Suddenly the connection to my interbase db > doens't works anymore. I get the following message : > .... > File /usr/local/zope/lib/python/Products/gvibDA/db.py, line 178, in _abort > File gvib/gvib.py, line 466, in rollback > Error: - Unable to complete network request to host "localhost". > -- Error writing data to the connection. -- Broken pipe This is a nice and very specific error message. It says that the communication channel to your interbase server (or relay) has been broken and no more data can be send through it. Usually, this means that the other side of the communication channel has closed the channel (this happens automatically, when the associated process dies). Look in the logfiles of the server (or relay) whether you can find any hint about why this happens. You could try to figure out, whether the problem occurs always in the same context. In your report, the problem was in the "_abort". Maybe, "aborts" are not handled correctly. There is some very strange code in the ZOracle Database adapter: When a query returns an exception, the code assumes that the database may be hosed, closes/reopens the connection and tries again once. I removed the strange code (during a memory corruption hunt) and we determined that Oracle 8.1.6 does not need it any more. But maybe, this is a way for your Interbase problem? Dieter

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Re: [Zope] Looking for different style
by Dieter Maurer 15 Aug '00

15 Aug '00

cuiod-tec Jens Gelhaar writes: > I need a better way to render a DTMLDocument and store the result in > variable than > <dtml-let variable="_['documentname']"> > but I do not like the style, it looks clumsy. Is there an another way? I > would think something like documentname(...), but the acquisition does not > work. Usually, you simply use <dtml-let variable=documentname> You need the "_[...]" only, if either: * "..." is not a valid Python name * "..." is a Python expression Dieter

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