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Global Product Registry and broken ZClass instances ?
by Darcy Clark 05 May '02

05 May '02

I was happily working on my Zope server this morning when all of a sudden all instances of one of my custom ZClasses broke (i.e. they were no longer editable through the ZMI). Initially I though it was something that I had done, but nothing I had done recently could have possibly had any effect on this particular ZClass. So then I went back through the transaction log on the off chance that I had done something that might have caused the problem and I found this transaction : "Rebuilt global product registry by Zope 2002-05-03 10:53:21 AM" It's something that Zope did automatically without my involvement and it was exactly the same time that I first saw the problem. Anyway I undid this transaction and all is peachy again. My ZClass is based on few other Products, but all the other Products are still installed and they are all working to the best of my knowledge. Why would rebuilding the Global Product Registry cause all of my ZClass instances to break ? What the heck is the Global Product Registry ? I don't see mention of it in any of the documentation. thanks for any info., Darcy

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can below error be resolved in anyway?
by Peter Stams 05 May '02

05 May '02

Zope Error Zope has encountered an error while publishing this resource. Error Type: Bad Request Error Value: Invalid file name amphora.zexp _____ Troubleshooting Suggestions * The URL may be incorrect. * The parameters passed to this resource may be incorrect. * A resource that this resource relies on may be encountering an error. For more detailed information about the error, please refer to the HTML source for this page. If the error persists please contact the site maintainer. Thank you for your patience. <http://www.zope.org/Credits> Powered by Zope Traceback (innermost last): File /home/amphora2/zope2/lib/python/ZPublisher/Publish.py, line 150, in publish_module File /home/amphora2/zope2/lib/python/ZPublisher/Publish.py, line 114, in publish File /home/amphora2/zope2/lib/python/Zope/__init__.py, line 159, in zpublisher_exception_hook (Object: Zope) File /home/amphora2/zope2/lib/python/ZPublisher/Publish.py, line 98, in publish File /home/amphora2/zope2/lib/python/ZPublisher/mapply.py, line 88, in mapply (Object: manage_importObject) File /home/amphora2/zope2/lib/python/ZPublisher/Publish.py, line 39, in call_object (Object: manage_importObject) File /home/amphora2/zope2/lib/python/OFS/ObjectManager.py, line 512, in manage_importObject (Object: Zope) Bad Request: (see above) Peter Stams, EXORIOR B.V. Phone : +31 (0)23 540 1234 Mobile : +31 (0)6 2901 5654 Fax : +31 (0)23 540 1395 E-mail : p.stams(a)exorior.nl Spaarnwouderstraat 50, 2011 AE, haarlem, The Netherlands This email and any files transmitted with it are intended solely for the use of the individual or entity to which they are addressed. Any unauthorized disclosure, use or dissemination, either whole or partial, is prohibited. If you are not the intended recipient of the message, please notify the sender immediately and do not, disclose the contents to any other person, use it for any purpose, store or copy the information in any medium. Copyright in this e-mail and attachments created by Peter Stams belong to Peter Stams.

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standard_error_message not being used on 404's ???
by Jean-Francois.Doyon＠CCRS.NRCan.gc.ca 05 May '02

05 May '02

Hello, For some reason, it seems that my "standard_error_message" is not being used on 404 errors !? It get s used by Zope when internal errors occur, such as problems with Python scripting or something, but not on 404's ... Is this normal ? How do I alter the messages for 404's ? Thank you, Jean-François Doyon Internet Service Development and Systems Support GeoAccess Division Canadian Center for Remote Sensing Natural Resources Canada http://atlas.gc.ca Phone: (613) 992-4902 Fax: (613) 947-2410

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ODBC issue with 8-bit chars || ZmxODBCDA query
by Itamar Shtull-Trauring 05 May '02

05 May '02

Hi all, A question about ZODBCDA (on Zope 2.5) querying an Access database. The result of the query includes Hebrew, i.e. 8-bit characters. On one computer (running XP) the hebrew is returned correctly. On another (running W2K) queries replace the hebrew with *question marks*! Any idea what may cause ODBC queries to convert 8-bit chars to question marks, and how to solve this? A related question -- has anyone updated ZmxODBCDA to work with the lastest mxODBC? The author (Dylan Jay) tells me he hasn't had the time, so if anyone does have this code he'd probably rerelease the DA. Thanks in advance!

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Building SCAMMA with Zope
by alejandro.montenegro＠alumnos.utfsm.cl 05 May '02

05 May '02

Hi.. We are a team of students that want to try Zope's capabilities..in this moment we are building a SW called SCAMMA.. SCAMMA is a WAP/WEB site that supports the catalogation and monitorization of sea species. Every class of sea species has an information of her own, that is why the access to a class of sea species must be differentiated. The technical requirements are: - Interface system-user via FLASH and WEB/WAP (HTML and/or XML and WML) - Data Bases with potential escalability(to support modules of sea species classes). - Feedback by the authorized users(to support the monitorization). - It must be able to comunicate with an statistic system(program) to analize the data generated by the system. - It must be able to generate (or comunicate with other programs that generate) oceanic charts. - It must have all the functionalities of a ordinary portal such as forums, mailing list, mail, chat, publication of data(papers), etc. - It must be capable of manipulate various types of multimedial content such as photos, videos, charts, maps, pdf, etc. Doubts: - How is the complexity of interacction with others DB, (i.e. excluding the ZODB), such as Postgresql. - Can u put flash animations?, can u treat them as objects?, and materialize them in the ZODB. - Can Zope easily interact with other programs in or out the server?. - How would you estimate the performance of a site (developed with Zope) of this characterictics. - Can Zope dinamicly generate any multimedial content, such as images or flash animations. If you think Zope is the perfect tool for this, or that we need to develop a special module to zope, or can answer some of the doubts, or just want to make any kind of comment .. please send a mail to the list. I hope Zope has the capabilities to do this, and much more.. If you want to know more about SCAMMA visit sourceforge.net regards.. Alex Montenegro Student of computer engineering Technical University Federico Santa Marìa PS: On the Doubts part when i ask if Zope can do something?, i mean if Zope or any existent module or component or proyect(future components) can do that something. PS: sorry about the english, we are chilean.

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ZClasses vs. Python Products
by Sean Hastings 04 May '02

04 May '02

Help! I Have chosen Zope to do a new web app. It is a 2 man project - 1 Programer - 1 UI Designer with programing experience. I am trying to decide whether to build the App using Zclasses or Python Product. I found this URL "http://zdp.zope.org/portals/developers/designstrategies/products" It lists advantages of Python product as: 1. You can upgrade them. 2. You can write all of your logic in Python. 3. You write your UI in DTML. 4. You can manage all of this using CVS However: 1. it then says why it is harder to change things in a python product. 2. I can still use python scrips with Zclasses 3. I can still write the UI in DTML 4. There appears to be a CVS extension for Zope available. On Zope IRC I was told that there are some scalability, stability, and code mainatanance issues issues with Zclasses but did not recieve any elaboration on that. What are the issues? It seems like I lose a lot of the advantages of Zope's second veiw by using a Python Product - in that I can't have my UI person atatch DTML methods to the classes I write. What future developments can I expect? Will ZClasses become better in the future? Will more second Veiw handles be added for Python Products? Might code be written to generate a Python Product directly from a ZClass based Product? The consensus on Zope IRC was that "ZClasses suck", but I am failing to see the advantage of not just building a product with ZClasses from within Zope. What am I Missing? Can anyone direct me to further information - or give me an example of a situation where I would be in bad shape to have chosen ZClasses over Python Product? I need to make this decision soon. --Sean Hastings --sean(a)havenco.com

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ZRoundup
by dman 04 May '02

04 May '02

I need to choose an issue tracking system to deploy at my current employer. Roundup looks good and it even has an existing zope product. However I ran into a problem installing it and haven't gotten any info on the roundup mailling list. I installed the ZRoundup product as usual and it is listed in the "add" menu. However I get this error when I click the submit button to add an instance : ~~~~ Site Error An error was encountered while publishing this resource. Resource not found Sorry, the requested resource does not exist. Check the URL and try again. Resource: http://deborah.iteams.org:9673/roundup-support/manage_addZRoundup ~~~~ The Folder where I am trying to add the ZRoundup object is http://deborah.iteams.org:9673/roundup-support/. The product contains the following snippets in __init__.py and ZRoundup.py respectively : ~~~~ # product initialisation import ZRoundup def initialize(context): context.registerClass( ZRoundup, meta_type = 'Z Roundup', constructors = ( ZRoundup.manage_addZRoundupForm, ZRoundup.manage_addZRoundup ) ) ~~~~ ~~~~ modulesecurity.declareProtected('View management screens', 'manage_addZRoundupForm') modulesecurity.declareProtected('Add Z Roundups', 'manage_addZRoundup') def manage_addZRoundup(self, id, instance_home, REQUEST): """Add a ZRoundup product """ ~~~~ I don't know anything about developing Products. Can anyone tell me what is wrong with it? -D -- A wise servant will rule over a disgraceful son, and will share the inheritance as one of the brothers. Proverbs 17:2 GnuPG key : http://dman.ddts.net/~dman/public_key.gpg

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logout for users?
by dman 03 May '02

03 May '02

Is there a way I can provide for an authenticated user to un-authenticate themself? I don't really expect this to be useful for most users, but when testing my application I need to log on as several different users and see that each one works. It would be nice if I could do that without restarting my browser. -D -- Contrary to popular belief, Unix is user friendly. It just happens to be selective about who it makes friends with. -- Dave Parnas GnuPG key : http://dman.ddts.net/~dman/public_key.gpg

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DCOracle 2 and long text fields..How to use them?
by Chris Beaumont 03 May '02

03 May '02

Hello, Maybe someone here can help.. I had thought that DCOracle 2 (now) supported long text fields, but when I tried to insert more than 2k into one (after upgrading) I got a 'string literal too long' error from Oracle. Is there some trick to this or am I running into a DCO2 or Oracle limitation? I'm using Oracle 7 which (I think) is supposed to support up to 32k in long text fields.. I'd hate to have to continue working around this in the way I have, by using Oracle7's 2k(max) varchar2 columns and splitting text in Python on input/concatenating them together on output.. That is just ugly.. There must be a better way... Also, is there any way to use the LONG RAW datatype to store images? We are using Zope with Oracle as a CMS and need the long text capability for descriptions within web pages.. BTW...We are a nonprofit and can't afford the upgrade to Oracle 8/9.. etc. -Chris

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Re: [Zope] Quick Slide Show or Presentation on Zope
by Paul Browning 03 May '02

03 May '02

--On 03 May 2002 14:58 -0400 "Jorge O. Martinez" <jmartinez(a)eMediaMillWorks.com> wrote: > Hi: > > I found this useful to understand what zope is... hope it helps... > > http://www.bris.ac.uk/ISC/zope/zfest/zope/ Uh-oh. That's a bit dated. Slightly less dated (but still dated) is http://www.business.city.ac.uk/ero/150101.html though the HTML version seems to have gone walkabout. See also the Pro Zope Material at http://www.zope.org/Members/BwanaZulia/zope.html Paul -- The Library, Tyndall Avenue, Univ. of Bristol, Bristol, BS8 1TJ, UK E-mail: paul.browning(a)bristol.ac.uk URL: http://www.bris.ac.uk/

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