February 2000 - Zope

Parse
by Pedro Silva 08 Feb '00

08 Feb '00

Hi, I'm wondering how can I parse a file, to look for some specific information. If anyone could tell me, please send me a mail to: psilva(a)ruido-visual.pt. This is really important amd I have some urgency. Thanks, Pedro (Portugal)

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DTML Container?
by Mike 08 Feb '00

08 Feb '00

Hello, I wondered what is the simples (and efficient) way of implementing subj. Let I explain first what it may be needed for. Suppose we'd like to create a class modeling an article (newspaper article, for example). An article has attributes 'title' and 'body' and can contain zero or more photos. Article's body contains some HTML text exposing those photos, if any. Note the images are aggregated by article and should not be exposed anywhere else. The simplest way is to subclass our Article from (Z)ObjectManager and implement title and body as properties. On this way we are losing the DTML capabilities which we were have in DTML document/method. This is a big lost, indeed (at least we have to write <img src=img width=... height=... alt=...> instead of just <dtml-var img>). The one way to keep object DTML-aware is to subclass DTML method also. I tryed this approach and found this working, but with one exception: <dtml-var img> does not work. It does not work on _any_ callable objects. The workaround is <dtml-var "img.tag()"> or something equivalent. This is also not so good. Another approach is to render properties as DTML strings using external method: from DocumentTemplate import HTML def render_dtml (text='',mapping={},**kw) : html = HTML(text) return html(client=None,mapping=mapping) This also works fine but also has a dark side. As I found in sources, Zope stores DTML methods and documents in parsed form, this was done not just for fun, I guess. I think the parser is very expensive thing so on this way we get a great performance impact, right? Does anybody have any solution or just mention on it? Best, Mike P.S. Why nobody asked this before???

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RE: [Zope] Difference between manage_addProperty on a DTMLDocumen t and on a Folder
by Benillouche, Michael 08 Feb '00

08 Feb '00

Hi Tres, Thanks for your answer, I did what you say : <dtml-call "REQUEST.set('compteur_login', _.str(compteur) )"> <dtml-call "manage_addDTMLDocument(id=compteur_login)"> <dtml-with compteur_login> <dtml-call "manage_addProperty('type', 'FC', 'string')"> </dtml-with> but only the document is created ; the property is NOT added . It looks bizzare, Any other thoughts ? Michael -----Message d'origine----- De: Tres Seaver [mailto:tseaver@palladion.com] Date: lundi 7 février 2000 23:41 À: Benillouche, Michael Cc: zope(a)zope.org Objet: Re: [Zope] Difference between manage_addProperty on a DTMLDocument and on a Folder "Benillouche, Michael" <Michael.Benillouche(a)france.acnielsen.com> > I have the following problem : > > When I execute this code : > > <dtml-call "REQUEST.set('compteur_login', _.str(compteur) )"> > <dtml-call "manage_addFolder(id=compteur_login)"> > <dtml-call "_[compteur_login].manage_addProperty('type', 'FC', 'string')"> > > The Folder is created with the property 'type' > > But when I execute this code : > > <dtml-call "REQUEST.set('compteur_login', _.str(compteur) )"> > <dtml-call "manage_addDTMLDocument(id=compteur_login)"> > <dtml-call "_[compteur_login].manage_addProperty('type', 'FC', 'string')"> > > I have the following error : > > Error Type: AttributeError > Error Value: 'string' object has no attribute 'manage_addProperty' > > It seems that manage_addProperty doesn't behave the same way on a Folder and > a DTMLDocument . > Any solution to make it work ? > Thanks a lot. The "_[compteur_login]" is causing the document to be rendered, I think. Try:: <dtml-with compteur_login> <dtml-call "manage_addProperty('type', 'FC', 'string')"> </dtml-with> -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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FAQ product needed for Zope.org?
by Darran Edmundson 08 Feb '00

08 Feb '00

I have a suggestion: why not kill the "Tip" on Zope.org and reincarnate it as a "FAQ"? Optionally, if someone was motivated, it would be nice to add a selectable subject area (DTML, SQL, Installation, etc.) useful in pruning searches and some mechanism (moderation?) for ensuring that submitted FAQ's are worthy of inclusion in the database. My feeling is that such a product implemented on Zope.org would expand in content rapidly. It would reduce FAQs to the mailing list and really help relative newbies like myself to solve ... well, FAQs. Such a product would complement the How-To documents nicely. Comments? Cheers, Darran.

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Running Zope on an Apache 1.26 Virtual Host?
by Pat McCarthy 08 Feb '00

08 Feb '00

Hi All, I'm interested in running Zope on a virtual host running Apache 1.26 and I was wondering if this is possible, and how I should go about installing it? I did some searching through archives, and saw a few "how-to" articles, but most of them looked like they were dealing with installing Zope on Apache 1.39 in a non-virtual environment. I believe I need to use FastCGI or PCGI? But I was wondering if there was a how-to about this topic, or anyone else out there who has successfully run Zope in an environment such as this. Thanks. Pat McCarthy pat(a)wakeboarder.com (541) 344-4032

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Random IPC8 thoughts + transactions in MySQL
by Itamar Shtull-Trauring 08 Feb '00

08 Feb '00

Now that I'm back from the USA, some random thoughts: 0. It was really great meeting all the people from DC and from the lists. I'm sorry that I didn't have time to to talk to everybody, but I guess there's always the next conference. 1. Some quotes: "Don't write a workflow system in DTML" --Chris Petrelli (we tried it - he's right) "Nobody understands the Zope security system" (this was someone at DC!) "You say that you must have case sensitiveness in programming languages, but the first thing you say when you teach it is *don't use variables with different case names*" --Randy Pausch explaining why Python should be case-insensitive. I'll say this again in case you haven't visited the site yet - http://www.alice.org -- Alice is COOL. 2. Our new programmer's reaction at seeing the Zope T-shirt: "Looks like a Zope Error." How about the next version of the tshirt having the Jabberwocky? "Beware the Renderwob, my son! The jaws that bite, the claws that catch! Beware the Jubjub bird, and shun The unauthorized Validate!" The printed docs DC gave out also included the Zope Quick Reference, which was nice. 3. For the more advanced, I really recommend reading Phillip Eby's slides (I need to find a Powerpoint viewer for Linux), and Jim Fulton's Algebra of Acquisition and Zope Architecture slides. 4. According to (and thanks to) Michel Pelletier the ZCatalog is going to be having some really cool stuff in the future: partial searching is in CVS now, searching according to the permissions of the searcher should be in soon(?) for the PTK (i.e. Anonymous won't get items in the search results that it doesn't have permission to access.) Later on there's stuff like pluggable Indexes. And from Linuxworld: Right next to DC, also at Tucows, were the MySQL guys. I asked them about transaction support - "I have code for it right here on my notebook. If we like it we'll put it in the next release. You'll have the option of leaving it off if you want for speed, on a database by database basis." -- Itamar S.T. itamars(a)ibm.net

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Re: [Zope] Finding Zope errors (from World Pilot)
by Tres Seaver 08 Feb '00

08 Feb '00

Andrew Diller <dillera(a)isc.upenn.edu> scribbled: > Hello: > > I'm still trying to track down why this test WorldPilot Product is not > working on my Zope server. > > I've got SquishDot and RTChat working, so I know that Zope is OK. > > I've set up an IMAP server on my ZOPE server, and connected OK with an > IMAP client, so I know that the username/password and imap server is ok. > > I'm using uwash imap server. > > I wonding where I can see the errors/log from Zope- I've got Zserver > logging, but its only showing access to Zope, not the errors that I must > be getting when the WorldPilot login fails. Check the archives for the zope or zope-dev lists over the past two weeks -- Anthony Baxter (I think!) posted a (tiny!) patch to WorldPilot which let it run with WU IMAP and M$ Exchange (the released version depends on Cyrus IMAP). -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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ZCatalog, catalogAware Zclass and Versions
by julio dinis 08 Feb '00

08 Feb '00

Hi all, I have a Catalog Aware Class that I use to create objects and automatically index them (no shit! I'm a genious :) This specific class creates me a Site Operation/Development problem every time I start a version. This is because if in my version I create some objects of my Class they would be indexed (again my genial brain!), then locking my catalog, i.e, the methods I have for people to create objects will no longer work because my version is locking the catalog. If there is a way/how-to to a version dont do this I would apreciate feedback. Meanwhile... if I discover a good method I'll post on the list. I thought of every time I enter a version I rewrite/change my class (example: a property default_catalog set to "TempCatalog") to avoid the lock of my Current Catalog. But as you can imagine I dont want to do this every time I start a version. My best regards, Júlio Silva ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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Is e-commerce feasible with Zope?
by Diego Dainese 08 Feb '00

08 Feb '00

Hi all, I'm a Zope newbie; I working for a little support company that realizes (above all) dynamic Web sites with Apache + PHP; I've already worked with these tools but I feel that PHP is too limited for this complex duty, mostly because I'm accustomed from long time to such a powerful language as Python; thus for my next project I would try to employ Zope+Python instead. The problem is that as with many other commercial project I've a strict deadline to couple with. For this reason I need at least a confirmation that Zope is the right choice for this project; if it is, I've no problem to invest some time to learn how to use it efficiently. Obviously I would be very happy if you will give me some hint on how to proceed also ;-) The site I must realize is a e-commerce site very similar to amazon's one. The products catalog will reside in another site (not handled by us), and from this site when a customer clicks on a product, a script on our site will be called with the product's code as parameters. The script will add the product to a shopping basket; later the customer can proceed to the checkout. Here she/he will be able to create an account on our site for later shopping. What I need is: - A means to implement the basket; with Apache+PHP I would use a simple file containing a list of product codes, or an SQL table. - A means to set a cookie on the client browser and to associate the it with a basket; with Apache+PHP I would use a SQL relation cookie->basket, or I would put in relation the basket filename with the cookie. - A means to store the products database; with Apache+PHP I would use a simple SQL DBMS. - A means to store customer informations on the site; with Apache+PHP I would use another SQL table, with a relation one to many to store the (possibly) many customer's addresses. - I would let the site to be accessed both via https and http. - The site must be easily internationalized, thus I must be able to replace all the text in the pages with a translated version; with Apache+PHP I would use an include file where to store the text messages as PHP constants. How can I implement all this using the "Zope's Zen"? ;-) If you need some other informations I would happy to give them to you. I greatly appreciate any kind of help. Bye, -- Diego | To reply remove the `x' and swap the | Sorry for my Dainese | words around the `@' in the address. | bad English.

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Methods of Local Filesystems
by Pedro Silva 08 Feb '00

08 Feb '00

Hello, I would like to know all the methods that I can use with Local = Filesystems. I'm doing something that uses Localfs and I need to know = all the methods that I can use with this. If someone could help me, I would appreciate. Thanks, Pedro

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