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here indicator with tree
by Andy Heath 11 Mar '00

11 Mar '00

given a tree widget with links on the branches how could you arrange for some small image to be loaded next to the branch when you click on it so as to indicate where in the tree you are )the links display info in another frame). Andy -- ------------------------------------------------- Andy Heath a.k.heath(a)open.ac.uk The Open University +44 (0) 114 2885738

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Python Class Question
by Daniel G. Rusch 11 Mar '00

11 Mar '00

Let's say I have a class called Chicken in a file called Chicken.py Now let's say I want to add a method called getSize() to the Chicken class. It's a piece of cake to add the method in the Chicken.py file. But, is it possible to add the method to the Chicken class, but have that method in a different file, i.e. some file other than Chicken.py? Thanks, Dan

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Re: [Zope] getting object reference from an id string?
by Siggy Brentrup 11 Mar '00

11 Mar '00

"Darran Edmundson" <Darran.Edmundson(a)anu.edu.au> writes: > Say one has an object reference and knows the > string id of a child node. From this info, we > want an object reference to the named child. Correct me if I misunderstand you completely, but what's wrong with <dtml-call "REQUEST.set('desired_ref', known_ref[desired_id])"> Siggy -- Siggy Brentrup - bsb(a)winnegan.de - http://www.winnegan.de/ ****** ceterum censeo javascriptum esse restrictam *******

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Zope in chroot enviroment
by dillera＠isc.upenn.edu 11 Mar '00

11 Mar '00

Is anyone running this? Can it be done? Can Zope be frozen? Is there a way using Apache and not Zserver, or is this impossible? -andy diller

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Re: [Zope] Is Zope syntax inconsistent ?
by Tres Seaver 11 Mar '00

11 Mar '00

Glyph Lefkowitz <glyph(a)twistedmatrix.com> > > On Fri, 10 Mar 2000, Phil Harris wrote: > > > As someone earlier today on the list said, "if it's in quotes it's python" > > (or something similar). > > > > Basically Python rules apply when using any expressions in zope dtml-var > > and other tags. > > I still think it's an inconsistent syntax. It should be possible (by > overriding __coerce__, I think? I haven't had time to look this up yet) > to make the == operator do something different. AUTHENTICATED_USER is > often used as a string (at least what I've seen of it ...) When in doubt, read the fine manual. The _actual_ syntax you are using is:: <dtml-var name="AUTHENTICATED_USER"> which can be abbreviated (and is, by almost every Zopista) as: <dtml-var AUTHENTICATED_USER> The "name" form of the var tag is the "preferred" one, for the types of applications DTML is really designed for: simple scripting of objects built in Python. It does several "automagic" things with the name: - If it is callable, calls it, passing the current object, the current namespace, and the REQUEST; it then replaces the object with the result of the call. - If it has a string coercion (__str__) method, calls that and replaces the object with the result. This behavior is the Right Thing (TM) for simple scripting; but it _isn't_ Pythonic (the automagic stuff smells more Perlish, really). The "in quotes" version is really:: <dtml-var expr="AUTHENTICATED_USER"> but can also be spelt (and mostly is):: <dtml-var "AUTHENTICATED_USER"> The "expr" form of the var tag evaluates the Python expression (in this case, to the object AUTHENTICATED_USER). For fairly obvious security reasons, the evaluation takes place inside a restricted namespace, without the usual builtins; the "safe" builtins are made available as members of the "_" namespace. > > Also, "if it's in quotes it's in python", why do I need to do _.str()? > why does dir() not work? It seems like some pretty horribly munged sort > of python... > > > > I would expect an object to behave consistently wherever it was used - so > > > if it renders/returns/evaluates to 'zope' inside a dtml-var I would expect > > > it equally to render/return/evaluate to 'zope' inside a dtml-if. > > > > If it doesn't then surely we have an inconsistent syntax. How do we know > > > how any object is going to behave inside a dtml tag ? The simplest disambiguation possible is to cease using the shortcut forms, and always spell what you really want: <dtml-var name="AUTHENTICATED_USER">  or <dtml-var expr="AUTHENTICATED_USER.getUserName()">  Hope this helps! Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Zope under low Disk Conditions
by Andrew Kenneth Milton 11 Mar '00

11 Mar '00

I've just had a few frustrating hours trying to work out what was going on with Zope. It stopped allowing the addition of DTML-Methods. The connection would just hang waiting for the Method to be created (also happened with DTML-Documents). Turns out that /tmp was out of space temporarily. -- the disk that Zope was running on had plenty of space. It'd be nice if it would return low disk space errors rather than go off into never-never land. -- Totally Holistic Enterprises Internet| P:+61 7 3870 0066 | Andrew Milton The Internet (Aust) Pty Ltd | F:+61 7 3870 4477 | ACN: 082 081 472 | M:+61 416 022 411 | Carpe Daemon PO Box 837 Indooroopilly QLD 4068 |akm(a)theinternet.com.au|

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REQUEST vraible methods
by Chris Withers 11 Mar '00

11 Mar '00

Hi, I'm trying to write a SiteAccess Rule to do some simple virtual hosting helping. Basically, I'd like to have access from http://www.mydomain.com (which is virtually hosted...) and from http://zope-host.nipltd.com/mydomain (the actual Zope host) and have all the management views, absolute_url()'s, etc working properly. If you just drop a SiteRoot in /mydomain then everything works fine through http://www.mydomain.com but http://zope-host.nipltd.com/mydomain/manage just jumps to http://zope-host.nipltd.com/manage. So I'd like to write my own Access Rule to do this. Now, the documentation for SiteAccess mentions a few methods of the REQUEST object that I can't find documentation for. I was wondering where I could find complete documentation for the REQUEST object, or how I can find out what its data and method attributes are? cheers, Chris

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true/false property changes (newbie)
by Tom Scheidt 10 Mar '00

10 Mar '00

Is there a way i can place a checkbox in a form and have the script below change the properties only if the checkbox i checked. So if the box is checked, for instance, a headline will appear on the page, and if not, nothing will appear. Make any sense? Thanks in advance. <dtml-with "manage_clone(story_html,REQUEST['new_id'],REQUEST)"> <dtml-call "manage_changeProperties( headline=REQUEST['new_headline'], subhead=REQUEST['new_subhead'], story=REQUEST['new_story'], )"> </dtml-with> <dtml-call "RESPONSE.redirect( DestinationURL() +'manage_main?update_menu=1')"> ************************* Tom Scheidt www.falsemirror.com tom(a)falsemirror.com *************************

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XSL for Zope - a bounty on this?
by morton＠dennisinter.com 10 Mar '00

10 Mar '00

A number of people have expressed a desire to have XSL support in Zope. The projects I am working on also seem to be needing the application of XSL, and whilst we can (and will) use some external XSL processor, it would seem that a 'cleaner' solution would be to have XSL support directly in Zope. I originally came to want to use Zope because I needed a tool that allowed the manipulation of a persistant tree of objects; my prototype was done in XML, but it needed persistance, an interface, and a programming language, hence the use of Zope. Even having only XPath support would be an extremely usefull way for packaging up simple 'queries' on the Zope database. Ive been looking around at the Python XSL implementations and the FourThought 4suite is looking pretty damned good, especially considering their goal of eventual ODMG 2.0 support. Zope desparately needs some standards compliance, even if only for the buzzwords. The question on my mind is: how much do other people want XSL in Zope? Im willing and able to put some $$$ up for a bounty on this. Is anyone else? I guess Id also like to heard what DC has to say about this; whether they are willing to have an external group contribute/merge a key technology into their codebase, and if they have any preferences about who this group might be. --------------------------------------------------------------- Heres what Uche Ogbuji of FourThought has to say about Zope http://www.pythonjournal.com/volume1/issue2/col-intranetpython/ The Zope Dope Digital Creations, fresh from a capital infusion, has given Pythoneers their first complete native Web application platform in Zope. the "Z Object Publishing Environment". Zope is similar in scope to Cold Fusion or SilverStream, but open-source and python-powered. Zope accumulates many bits and pieces of a successful Intranet site. It incorporates a database management system with object extensions (which, unfortunately, doesn't yet support the Object Database Management Group's specifications) as well as facilities for developing template Web sites, an application framework, a CGI mechanism for handling HTTP requests for objects, an HTTP and FTP server, and a comprehensive application framework to tie it all together. Z Templates are developed using a proprietary XML-based language, the Document Template Markup Language (DTML). ZTML does make some departures from the XML community in such areas as style-sheets, but it is hoped that Digital Creations or other contributors to Zope will work to close that gap. Zope is a synthesis of Digital Creations' many earlier products, such as Bobo, Principia and PCGI. Bobo has been especially popular among Python/Web programmers, and Zope looks poised to retain the tradition. If Zope can move a bit closer towards object database and XML-processing standards, it is likely to be quite popular outside the Python community as well.

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Is Zope syntax inconsistent ?
by Richard Moon 10 Mar '00

10 Mar '00

I've hit the 'Zope Wall' again ! Can anyone explain why <dtml-if expr="AUTHENTICATED_USER=='zope'"> ZOPE ! <dtml-else> NOT ZOPE ! </dtml-if> <dtml-var AUTHENTICATED_USER> <br> Displays NOT ZOPE ! zope While this <dtml-if expr="tune_id=='Reel'"> REEL ! <dtml-else> NOT REEL ! </dtml-if> <dtml-var tune_id> Displays REEL ! reel Which is what I expected ! Richard Moon richard(a)dcs.co.uk

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