August 1999 - Zope - Zope lists

RE: [Zope] Zope Lockups
by Paul Everitt 05 Aug '99

05 Aug '99

One word -- Zope debugger. Look at the access log to find out what the last request was. Shut down the Zope process, then use the Zope debugger (Python debugger with extra potatos and gravy) to step into the request. There's documentation on the Zope debugger on the website. --Paul Paul Everitt Digital Creations paul(a)digicool.com 540.371.6909 ----------------------------------------- The Open Source Zope application server http://www.zope.org/ > -----Original Message----- > From: Robert Leftwich [mailto:robert@leftfieldcorp.com] > Sent: Wednesday, August 04, 1999 9:00 AM > To: 'zope(a)zope.org' > Subject: [Zope] Zope Lockups > > > One of my clients has been having a problem with Zope locking up every > time she changes something. It appears that Zope goes into a loop > somewhere as there are no tracebacks or anything else to indicate an > error except that the browser reports that the page is unavailable and > any subsequent attempt to go to the management screens or any > other part > of the site fails. > > The setup is as follows : > Zope 1.10.3 (modified slightly to include the > _on_delete_object() > protocol and some timezones added to DateTime) running > ZopeHTTPServer as > localhost > Windows NT4 (SP3) > IE5 > > I can perform the same changes against a copy of her database without > any problems on my test setup which is running an identical 1.10.3 > installation on a NT4 (SP4)/IE5 machine. > > Has anyone else seen this behaviour or anything like it ? > Are there any issues with Zope/Python on an NT box and > service pack 3 ? > > Right now after spending most of this afternoon attempting to isolate > the problem I am open to any and all suggestions as to how to > track down > the problem. The major difficulty is finding out what Zope/Python is > doing when it goes off into the ether. Is there some way of breaking > into looping Zope/Python code to find out what it is up to ? > > Any and all help much appreciated > > Robert Leftwich > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For developer-specific issues, zope-dev(a)zope.org - > http://www.zope.org/mailman/listinfo/zope-dev ) >

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Image Border
by Michael Fox 05 Aug '99

05 Aug '99

Help! I am calling images as variables eg.  I have specified a string in the MyImage properties of border with a value of zero. yet when i code <A HREF="www.mylink.com"></A> I see a horrible purple border. What am I doing wrong? - Michael.

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Re: [Zope] Pluggable Brains?
by Anthony Baxter 05 Aug '99

05 Aug '99

>>> Joe Grace wrote > Are pluggable brains only usable with SQL or is it a more general purpose > tool than that? If it's general, could I get an example of using it > without SQL?-) well, they're usable in general by "searchable" things. LDAP searches, that sort of thing. Anthony

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RE: [Zope] Pluggable Brains?
by Brian Lloyd 05 Aug '99

05 Aug '99

> People, > Can someone point me to some documentation, messages or > source code that will give me a handle on what 'pluggable > brains' are and what I can do with them? > > Rob Page has just made a post saying that > Zope/ZODB3/pluggable brains can go a long way to integrating > with relational databases and I want to make sure I've got a > clue about all this! :) > > thanks > tone out, I was going to refer you the ZSQL Methods User Guide, but I just looked and it just barely mentions the concept of pluggable brains at the moment :( Simply put, pluggable brains means that you can associate a class that you've written in Python with the result record objects for a given SQL query. You can create a .py module in your Extensions directory (brain.py, for example) with a class definition such as: class SimpleBrain: """A simple example brain.""" def fullname(self): return self.first_name + self.last_name Now you create an SQLMethod, which for the sake of our example might look like: select first_name, last_name from employees This query (like all queries) will return a sequence of "record" objects, where each record object exposes its data as if the fields were object attributes. Now, if you go to the "advanced" tab for a query, you can enter the module and class name of a class that will be added as a "mixin" to the normal record object behavior. Just like defining an external method, you enter the module name (in Extensions) and the class name to be used. *Now* when you run the query, the record objects will also have your custom class mixed in - now they can have not only their data exposed as if they were Python attributes, but custom behavior too. In our example above, if you made brain.SimpleBrain the "pluggable brain" for our SQL method, you can now do:    ...in DTML, because fullname is provided by the class that is mixed into the resulting record objects. The only real rule to keep in mind is that your "brain" must be a mixin class (e.g. you can't have an __init__ that expects any arguments). Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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FYI: Zope Weekly News
by Amos Latteier 04 Aug '99

04 Aug '99

Hello, This week saw the launch of Bruce Perens's Technocrat.net. This is one of the highest profile Zope sites to date. Butch Landingin's Squishdot product for Zope is a big part of what makes the site tick. Way to go Bruce and Butch! Another major thread on the Zope lists this week was e-commerce. Scott Robertson released a credit card processing product for Zope, and there was a lot of discussion about existing Zope e-commerce packages and where to go from here. Finally, activity continues at a fairly intense rate in CVS as preparations for beta two are made. And thanks to David Ascher, you can now easily download snapshots of the Zope development tree. * Bruce Perens's new technology policy site, Technocrat.net made a big splash this week. Bruce Perens is a major open source figure, and his new site runs on Zope using the Squishdot product. http://technocrat.net/ http://slashdot.org/article.pl?sid=99/07/27/205246&mode=thread http://technocrat.net/932767939/ * Zope showed up on Slashdot again in an Ask Slashdot article. http://slashdot.org/askslashdot/99/07/31/0323235.shtml http://www.zope.org/pipermail/zope/1999-August/007580.html * Scott Robertson announced a Cyber Cash Connector for Zope. This allows you to conduct credit card transactions. A long discussion of e-commerce and Zope followed on the zope-dev list. http://www.zope.org/pipermail/zope/1999-August/007606.html * Chris Petrilli announced a Database Adapter status page. http://www.zope.org/Download/DAStatus http://www.zope.org/pipermail/zope/1999-July/007432.html * Paul Everitt posted a note showing the growth of interest in Zope as evidenced by the number of hits on Zope.org and the number of subscribers to the Zope mailing lists. http://www.zope.org/pipermail/zope/1999-July/007456.html * Chris Petrilli announced the availability of slides used in a Zope training. http://www.zope.org/pipermail/zope/1999-July/007431.html http://www.digicool.com/Solutions/Training/Material/ * Chris Petrilli posted a Database adapter roadmap. http://www.zope.org/pipermail/zope-dev/1999-July/001013.html http://www.zope.org/Information/DARoadmap * Paul Everitt posted an announcement about Zope/Python activities at the upcoming O'Reilly Open Source Software Convention. http://www.zope.org/Information/OReillyConferenceInfo http://www.zope.org/pipermail/zope/1999-August/007581.html * Michel Pelletier announced ZSybaseDA 1.0.1, a Database Adapter for Sybase. http://www.zope.org/pipermail/zope/1999-August/007637.html http://www.zope.org/Download/ZSybaseDA/ * Steve Spicklemire announced Zieve, Z-subclassable class that assists in sorting ZClasses in various ways. http://www.zope.org/pipermail/zope/1999-August/007691.html * Brian Lloyd responded to a question about Pluggable Brains with an informative post illuminating this powerful and under-documented feature. http://www.zope.org/pipermail/zope/1999-August/007743.html * Python guru David Ascher set up a nightly CVS snapshot archive for a couple major Python projects including Zope. This allows you to get access to the latest sources from CVS without using CVS. http://starship.python.net/crew/da/zopedists/ Keep on Zopin! -Amos -- Amos Latteier mailto:amos@digicool.com Digital Creations http://www.digicool.com

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RE: [Zope] RE: XML / XSL / DTD
by Alexander Staubo 04 Aug '99

04 Aug '99

Exactly how does this differ from my explanation of the <?xml-stylesheet> syntax? Transforming documents by URL traversal (as in my example URL below) could be offered as an alternative solution. Anyway, I bet Jim has something specific in mind. -- Alexander Staubo http://www.mop.no/~alex/ "Elvis skipped around the car and threw open the trunk. 'Hoopla!' he was heard to say, 'This is a 7.62mm M134 General Electric Minigun. Up to 6,000 rounds per minute. 7.62mm X 51 shells. 1.36kg recoil adaptors. Six muzzle velocity of 869m/s.' 'Oh,' said Rex, 'So that's what it is.'" --Robert Rankin, _They Came And Ate Us: Armageddon 2: The B-Movie_ >-----Original Message----- >From: Tres Seaver [mailto:tseaver@palladion.com] >Sent: 4. august 1999 16:47 >To: Alexander Staubo >Cc: zope(a)zope.org >Subject: [Zope] RE: XML / XSL / DTD > > >Alexander Staubo wrote: > >>Agreed. (Although nothing would prevent you from using DTML to output >>different style-sheet headers depending on the environment.) >> >>Acquisition -- something like >>http://myserver/HighBandwidthHtml/MyDocument perhaps -- would be fine, >>but how to specify a default style sheet? There might be cases where I >>would want user-selectable style sheets through cookies, or a >site-wide >>default style sheets without the need to explicitly state it >in the URL. > >I was thinking that acquisition would provide >"standard_xml_header/footer" >wrapper documents, which would call out the >location-appropriate style sheet, a >la standard_html_header. > >So the "default_xml" document could look like: > ><dtml-var "name=standard_xml_header"> ><dtml-var "name=xml_body"> ><dtml-var "name=standard_xml_footer"> > >-- >=============================================================== >================= >Tres Seaver tseaver(a)palladion.com http://www.palladion.com Palladion Software Houston, Texas, USA 713-523-6582 _______________________________________________ Zope maillist - Zope(a)zope.org http://www.zope.org/mailman/listinfo/zope (To receive general Zope announcements, see: http://www.zope.org/mailman/listinfo/zope-announce For developer-specific issues, zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev )

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ZServer vs. Apache
by Tim Wilson 04 Aug '99

04 Aug '99

Hi all, I'm still in the stage of trying to get the "big picture" of Zope. I still don't quite understand the relationship between ZServer and Apache. Is it either ZServer *or* Apache or can they work together? Would anyone care to provide a short summary of this concept. Thanks. -Tim -- Timothy D. Wilson "A little song, a little dance, University of MN, chem. dept. a little seltzer down your wilson(a)chem.umn.edu pants." -Chuckles the Clown Phone: (612) 625-9828 as eulogized by Ted Baxter

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re: [Zope] Pluggable Brains?
by Tony.McDonald＠newcastle.ac.uk 04 Aug '99

04 Aug '99

Brian, Evan, Very clear and succinct decriptions! Many thanks for that info. I've got a handle on what they do now...now to wake up Igor for some transplanting... Tone.

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random content generation
by apmonta＠worldnet.att.net 04 Aug '99

04 Aug '99

Hi, I have a question about the random content generation procedure listed in the How-To section of the Zope.org site. The machine I'm using is a 486 box with Red Hat Linux and Apache. I'm an all-around newbie. I followed the instructions for random content generation exactly, but I keep getting a "System Unavailable" error message now and then. I thought the problem was that I left empty lines in the "lines" properties I created as per the instructions (which are a little unclear incidentally about the syntax of entering document names in the property window). I fixed this, but Zope still returns the error message now and then *when I access the site from the Windows NT machines* in LSU's library. Why might this be? And is there anything I can do to stop it? Thanks for any help, Anthony Monta Dept. of English Louisiana State University apmonta(a)worldnet.att.net PS -- Our Zope site is www.english.lsu.edu -- you're welcome to look around starting Aug. 19th. Zope is IDEAL for building departmental websites at universities. You have no idea how enthusiastic people down here are about it!

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Re: [Zope] ZServer vs. Apache
by Christopher Petrilli 04 Aug '99

04 Aug '99

> Hi all, > > I'm still in the stage of trying to get the "big picture" of Zope. I still > don't quite understand the relationship between ZServer and Apache. > > Is it either ZServer *or* Apache or can they work together? Yes :-) > Would anyone care to provide a short summary of this concept. Thanks. Put simply, ZServer is a interface to the object publisher in Zope. It can understand a myriad of protocols: * HTTP (and WebDAV) * FTP * PCGI * Monitor access So if you're running a 100% Zope site (like www.zope.org :-) then you could put ZServer up as the main server, and it'd probably be a LOT faster (2-3x probably a good point to estimate, because of the overhead of CGI). If however, you're using something in combination with Zope, then you'll want to use Apache (or IIS, or Netscape) to integrate this all together. Make sense? Chris -- | Christopher Petrilli Python Powered Digital Creations, Inc. | petrilli(a)digicool.com http://www.digicool.com

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