April 2002 - Zope - Zope lists

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by e�� 01 Apr '02

01 Apr '02

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Re: [Zope] Accessing arbitrary Python objects from ZPT
by Casey Duncan 01 Apr '02

01 Apr '02

Michael Lausch wrote: > On Sat, 2002-03-30 at 00:06, Casey Duncan wrote: > >>Assuming these objects are mutable you might be able to do something >>like this at the end of your external method: >> >>object.__allow_access_to_unprotected_subobjects__ = 1 >>return object >> > > minutes before reading your reply i just found this out for myself, by > looking throug the code of the ZSQL methods. Isn't this a hack? will > this method also work with future releases of zope? or will zope 3 come > up with a better method of integrating external python programs with > zope? This is a hack. It makes me feel cheap whenever I use it 8^). This is the "quick and dirty" way to get access. Its also a great way to open security holes too 8^). > to be honest i feel a little disapointed that there is not better > documented way of doing this sort of stuff, since it semms to me that > there is a huge potential in this. write your "business logic" in a > python package and interface it with zope or use it as the model > together with a glade generated GTK GUI. The better way is to create a wrapper class and use declarative security on it to allow access to only those methods and subobjects that you really need TTW access to. That is not usually a five minute solution though. See the zope dev guide for details on this. > Will components be of any help? i can imagine to implement the interface > class as a zope integrated class and use any other class as the > implementation. Well first off, Interfaces aren't classes regardless of whether you use a "class" declaration to create them or not. Hopefully future Python versions will allow us to define interfaces without using the confusing "class" statement. Declarative security will still be the way it works in Zope 3, however those declarations can be made in configuration files rather than code. That allows you to use modules and secure them properly in Zope without modifying code or creating wrapper classes. -Casey

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Re: [Zope] crashes, viability, etc
by J�lio Dinis Silva 01 Apr '02

01 Apr '02

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To ZEO or not to ZEO
by Carlos de la Guardia 01 Apr '02

01 Apr '02

Hello, please help me out here. We have a site with the following characteristics: - Zope 2.5.0, Python 2.1.2, Linux 2.4.7 - Heavily dynamic content, mostly using ZPT with python scripts, Python products and Zcatalog (65,000 documents with a full text index). No SQL databases. - 500,000 hits daily average, 45,000 pageviews, peaks at 40-50 requests per second. - We have Squid in front, but since the site will have user accounts, many pages which display user specific information cannot be cached. Currently the site is running on a single PC with 1GB RAM and two processors. It is doing fine with Squid at the front, but the thing is we are about to enable the user account features and don't think the performance will be adequate. We are thinking of adding another machine or two behind a switch and use ZEO to handle Zope calls. Any recommendations or ideas on how to do this (or not) and what kind of machines to use will be very appreciated. Thanks a lot, Carlos de la Guardia Aldea Systems

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List editing with page templates
by Richard Wesley 01 Apr '02

01 Apr '02

I need to create a form (using page templates) that does roughly this: <BasicData> <selectable list of homogenous objects to attach to BasicData> <list of homogenous objects already attached to BasicData> The problem is that I can't seem to make the attached list persistent. In my action script for attaching a new list object, I check the request to see if the list is present and append the selected object to the attached object list, but the script never seems to have access to the request passed to the form. Slightly simpler test script (trying to accumulate two form variables): names=[] if request.has_key('names'): names=request.get('names') names.append ({'name':name,'age':age}) request.set('names',names) return container.form() What am I missing? TIA, - rmgw <http://www.electricfish.com/hawkfish/> ---------------------------------------------------------------------------- Richard Wesley Electric Fish, Inc. hawkfish(a)electricfish.com "I found it at the bottom of a locked filing cabinet, in a disused lavatory with a sign on the door saying 'Beware of the leopard.'" - Douglas Adams, _The Hitchhiker's Guide to the Galaxy_

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Re: [Zope-DB] problem with "required" parameter
by Dieter Maurer 01 Apr '02

01 Apr '02

guido tobar writes: > If I use a dtml method called "first" with this code: > <form action="second" method="POST"> > <input name="animal:required"> > </form> > Too many errors encountered; the rest of the message > is ignored: > > Now, I don't know How do I to catch the error in the > dtml called "second" > <dtml-try> > the name of animal is:<dtml-var animal> > <dtml-except EMPTY> > ERROR you write a empty string > </dtml-try> You need to be more specific: When is the error reported (during rendering of the form or the action) What is the traceback (including the "Error type", "Error value" headers). Dieter

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re: error message importing zope file
by Mark Halegua 01 Apr '02

01 Apr '02

I was away on a trip and using my laptop to work on a project. (by the way, traveling on Amtrak was great: they have a couple of seats in each car near an electric outlet and I was able to work for hours, with no distractions - i.e., no telephone, no pager, no tv - and got a lot of work done learning Zope.) I created a few pages of a site for a client, and tried to export it from the laptop to my desktop system for eventual transfer to the client's web server. However, the import isn't working. I know I have the file in the import directory on my office server (running SuSE 7.0, Zope version 2.4.1) and using a workstation with SuSE 7.2 to connect throught the Konquerer browser. The laptop is running SuSE 7.3 with Zope version 2.4.0. The error message I keep getting when I try to import the file through the Zope interface is: Error Type: UnpicklingError Error Value: invalid load key, 'ö'. I don't want to redo the work, so can anyone tell me why the import isn't working? Thanks, Mark

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DTML Question
by Matt Gregory 01 Apr '02

01 Apr '02

In a namespace like: mysite |_images |_mytemplate |_myportal How do I access images from myportal with a <dtml-var> ? I cannot find a help reference for this action and <dtml-var /mysite/images> does not work and neither does any other combination I can find. Do I need to do this with a python expression?

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Subject: problem with "required" parameter
by guido tobar 01 Apr '02

01 Apr '02

If I use a dtml method called "first" with this code: <form action="second" method="POST"> <input name="animal:required"> </form> Too many errors encountered; the rest of the message is ignored: Now, I don't know How do I to catch the error in the dtml called "second" <dtml-try> the name of animal is:<dtml-var animal> <dtml-except EMPTY> ERROR you write a empty string </dtml-try> __________________________________________________ Do You Yahoo!? Yahoo! Greetings - send holiday greetings for Easter, Passover http://greetings.yahoo.com/

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RE: [Zope] FIND AND REPLACE
by Schmidt, Allen J. 01 Apr '02

01 Apr '02

If you use Windows or have access to a Windows machine, go to www.macromedia.com and get the trial version of HomeSite5. Full product tryout for 30 days. Setup an FTP connection to your Zope, port 8021, and use the Find and Replace feature. Works great. Be glad to help offline if you need a quick pointer. Its pretty straightforward, though. Good luck! Allen -----Original Message----- From: Alejandro T. Singer [mailto:alejandro.singer@systeam.com.ar] Sent: Monday, April 01, 2002 10:10 AM To: zope(a)zope.org Subject: [Zope] FIND AND REPLACE I have to change on more than 700 dtml pages the syntax of a link. There's any automatic way on ZOPE to find and replace those parts of code ? Thanks Alejandro _______________________________________________ Zope maillist - Zope(a)zope.org 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 )

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