December 1999 - Zope

long folder listing patch
by Sam Gendler 27 Dec '99

27 Dec '99

I have been sitting at home with the flu, working on a laptop in bed, and I finally got sick of scrolling down the list of objects with my touchpad. Here is a patch that renders the folder list as a 2 column table, as well as puts a copy of the rename, copy, paste, etc buttons at the top as well as the bottom. The folder list only renders as a table if you create a boolean property for the folder called 'tableize' and set it to true. --sam

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RE: Error in connect
by Rob Page 27 Dec '99

27 Dec '99

> I'm trying to get your Oracle module for python working and > it compiled fine but when I run your test script I get the following output: > > Traceback (innermost last): > File "DCOracle_test.py", line 5, in ? > dbc=oci_.Connect(sys.argv[1]) > OracleError: (12154, 'ORA-12154: TNS:could not resolve > service name\012') > > any idea whats up? > > Its Oracle 8.0.5 installed on Redhat 6.1 with kernel 2.2.13 > and python 1.5 This might be a problem with tnsnames.ora. Can you connect to the server with sqlplus using the same connection string specified in the DA? That's a good first check of an Oracle install. Also, ensure the user as whom Zope is running has ORACLE_HOME and such configured/available. --Rob

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oops, mistake
by Tom Deprez 27 Dec '99

27 Dec '99

Sorry, I made a mistake, this is the correct address : The latest ZDP information at zdp.zope.org:8080/ZDP/ Regards, Tom.

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XML Example Cataloguing Problems
by Glenn R. Williams 26 Dec '99

26 Dec '99

Hi, Did anyone try the sample XML document from XML.com? I tried it and get an error on the cataloguing part. When I enter "getNodeName()=='entry'" in the expr field of Find Items to ZCatalog, I get a Zope Error as follows: Error Type: NameError Error Value: Eval Traceback (innermost last): File /home/gloonie/zope/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /home/gloonie/zope/lib/python/ZPublisher/Publish.py, line 179, in publish File /home/gloonie/zope/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /home/gloonie/zope/lib/python/ZPublisher/Publish.py, line 165, in publish File /home/gloonie/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_catalogFoundItems) File /home/gloonie/zope/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: manage_catalogFoundItems) File /home/gloonie/zope/lib/python/Products/ZCatalog/ZCatalog.py, line 306, in manage_catalogFoundItems (Object: ElementWithAttributes) File /home/gloonie/zope/lib/python/Products/ZCatalog/ZCatalog.py, line 489, in ZopeFindAndApply (Object: ElementWithAttributes) NameError: (see above) Thanks in Advance! Glenn -- Glenn R. Williams Advanced Decisions Inc. Running S.u.S.E. Linux 6.3 and Xitami Web Server!

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ZDP News
by Tom Deprez 26 Dec '99

26 Dec '99

Hi all, The latest ZDP information at zdp.zope.org/ZDP/ Regards, Tom.

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Re: [Zope] Why oh why won't my Gadfly Fly ?
by Michel Pelletier 26 Dec '99

26 Dec '99

Please continue to CC the list. John Platten wrote: > > > Maybe I just don't understand how exactly "gadfly" is supposed to work, > but here is the following notes about what I see with "gadfly": > > 1. Adding new directories to ./zope/var/gadfly will make new database names > (ie. directory names) show up in the pick list for selecting which database > to establish a new database connection with, however, when I try to "test" > the database connection with the "test-tab" by sumitting SQL to the database > connection, yes I do get tracebacks such as the following: > > Zope Error > > Zope has encountered an error while publishing this resource. > > Error Type: NameError > Error Value: 'LIKES' no such relation in DB I'm no gadfly expert, but it soulds like your gadfly is running fine. You just don't have the table 'LIKES' in whatever db you're connecting to. Try using a "create table" type SQL statement. For more info on creating tables, see the gadfly docs. -Michel

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Help! How to supress the base tag
by technews＠egsx.com 26 Dec '99

26 Dec '99

Hi, I want to make static pages from a site I made in Zope. I am using lwp-rget and it is doing a great job except that zope embeds a base ref in the html. Is there a way to supress/overwrite this using dtml??? I do not want to use ZMirror because I want to mirror it off the machine in question. Thanks for your help.. Merry Xmas to all. Adonis

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XML Content Mgmt. Questions
by Sean Upton 26 Dec '99

26 Dec '99

Hi, I'm new to the list; I've been using Zope for various functions internal to my company for the last few months. I work for a digital asset management company, and I've been considering using Zope to develop a web-based replacement for some desktop digital asset management software that my development team produces. I have a few questions for those who feel that they might be able to provide some advise on possibly porting the application to Zope. There are two scenarios for porting of such an application, likely the first followed later by the second. Sorry, this is somewhat long... ---------------------------------------------------------------------------- -- Scenario 1 - Use Zope for Content Repository Backend for our existing repurposing software First, we work with an XML DTD developed as an open standard in our industry (publishing). Our current product uses this data format internally, and exports (repurposes) the content to non-XML formats for use in various repositories, including Nextpage (formerly Open Market) Folio products (for searching), as well as other proprietary (industry-specific) databases. So my first question is how Zope would/could work as an additional repository that our current Windows based application could export it's data to? In other words, I am wondering if it is practical/possible to export data (via some protocol) from a proprietary app into Zope via http. The data is all text/xml and would potentially require some attached binary files (such as images, PDFs). The goal would be to use a ZCatalog to make the data searchable. -What approaches could be used to upload the data into Zope objects? Our program is already designed to do FTP uploads already, which seems like the preferred route to get the data into Zope, but then what? -Can the XMLDocument product be used for automated uploads to Zope? -How practical is this if we are dealing with searching several gigabytes of information at once? -I know that ZCatalog now has relevancy ranking, which is an important feature - what other features are planned for addition in the near future? -In terms of creating a portal product, could content be sorted into folders based upon certain metadata in the XML tags? -Also, how fast (for anyone who might know) would this be in comparison to using a Folio infobase in Folio Views (or LivePublish)? ---------------------------------------------------------------------------- -- Scenario 2 - Post a Windows-based desktop Digital Asset Management app to Zope I've been thinking that our exiting product would be better geared as a web application running on a server that is more tightly controlled than a desktop, or traditional client-server app. With this in mind, I was thinking that Zope might be appropriate. The only 2 drawbacks that I can think of are: -first, that HTML forms present user interface problems for one (and only one) component of our system, where lots of user input is required. If this was to be a web application, I would want this one step in the workflow of the product to be running as a Java applet (DHTML, forms, etc aren't enough :( ). How would one get a Java applet to repost data to Zope objects. I assume that one would simply use http from within the applet - simple enough, but what if the content is stored in XML using the XMLDocument product? Is the XML read only? How would one create a front end for fielded modification (like a database form) of XML in Zope. If such functionality doesn't exist within the XMLDocument or other products, how easy would it be to modify such products to add the ability to modify the data. I don't even care if the XML is reverse engineered (imported) into Zope objects, and re-exported to the same XML DTD - the only thing is that the data should only be value added; it cannot lose ANY of it's content along its lifespan. Any thoughts? -secondly, interfacing with legacy code, which is written primarily in ANSI C using LEX, that reformats text to and from hundreds of different formats (text filters). I would prefer to write this part as a separate server component that the interface/storage layer (Zope) could communicate with. How practical would it be to use XML-RPC (in its current incarnation in Zope) for such a beast? I don't have anything more than a surface understanding of the protocol. I prefer to write such a server in perl or lex/c, given my comfort level with those for text processing. Or, if that wouldn't work, I could always write a Python module interfacing to the code. Any advise in this matter is appreciated... I've been working on my own embedded XML-based DBMS server outside of my employment, which prompts me to think that perhaps if the above is not practical, I could always write a DA and use Zope as middleware to such a database, but I would prefer to keep the data in the Zope object-store... ---------- Sorry if I am showing my ignorance here; my experience with Zope primarily scratches the surface of its capabilities and features. Answers to these questions are really appreciated in helping me make design decisions. If certain functionality needed is missing, but someone sees easy and practical ways to add it, I guess I could always contribute to the development of other products (or contract needed changes out) that would make my life easier for such a product... I really like Zope for what I have used it for already, but I'm wondering how I could make it work for this larger problem. Any advise on the use of Zope for either scenario above (or both) would be really appreciated. Such advise might be helpful in determining if our company should use Zope for some of our core products; I will be out of town until Tuesday afternoon, but any replies to the list or backchanneled to me would be greatly appreciated. Thanks, Sean Upton The Salt Lake Tribune / Tribune Solutions Office: (801) 257-8816 - sean(a)sltrib.com (work) Mobile: (801) 918-7490 - sean.upton(a)m.cc.utah.edu (personal mailbox)

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Why oh why won't my Gadfly Fly ?
by John Platten 26 Dec '99

26 Dec '99

Does anybody know why Gadfly does not work under the new Zope 2.1.1 source release running on solaris ? For example: After downloading and installing Python 1.5.2 and building with the threads option, and then downloading and installing Zope 2.1.1 and running, Python works fine, Zope / Zserver works fine, External methods work fine, everythin else works fine, But when trying to use "Gadfly" with Zope, Gadfly pretty much does Not work at all! The Zope Content Manager allows you to establish "Gadfly" connections even when there is No "Gadfly" server running! Then the Zope Content Manger goes thru the motions of allowing you to Test and Submit SQL Queries to a Non-Running "Gadfly" Server. I have built installed and ran a-o-k the "Gadfly" Server and tested it out with the Test Scripts and with External Methods and "Gadfly" works just fine! But When trying to use "Gadfly" with Zope - Forget It - "Gadfly" just won't fly !!! -John Platten

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Zope and Dual-CPU machines.
by chas 26 Dec '99

26 Dec '99

Does Zope run better on dual-processor machines ? (using FreeBSD or Linux). I know that this might seem like a silly question but some applications, like MySQL, sometimes see worse performance on dual-CPU boxes than similar single-CPU boxes. It may be a moot point if the limiting factor is going to be bandwidth/network (on a PIII, 512 MB RAM box) but it'd would be nice to know if dual-CPU machines are worth it; Sorry, I realise that this just screams "it depends" since disk I/O and load vary from machine to machine, and application to application. Personally I'm more of a "stick lots of smaller frontline webservers in front of a monster DB" guy, but bandwidth costs are proportional to the number of servers I colocate at my access provider. Thanks in advance for any advice from chas ps. Just as a slightly off-topic question, this has made me wonder : If you have a dual processor machine, what needs to be changed in an application to make it "dual processor compatible ?" Or should the OS take care of all of that and do the load-balancing between the CPU's ? I guess that I won't have to change my Zope application at all ... just leave Zope to work it out. But I'm also creating some Python scripts to handle RPC services... or will the underlying Python interpreter handle all of that without me having to know ?

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