March 2000 - Zope - Zope lists

Oedipus 0.06 released
by Andrew M. Kuchling 02 Mar '00

02 Mar '00

I've made a new release of Oedipus, a Python package for presenting data from the Open Directory Project. http://www.mems-exchange.org/software/python/oedipus/ In v0.06, The improvements to the ODP code itself are pretty minor. The major milestone is that, after some diligent sleuthing, Jean-Claude Wippler tracked down an obscure bug in MetaKit that I was tripping over. A patch for MetaKit 2.0 is included in Oedipus 0.06, so for the first time you can actually handle a complete ODP dump. You'd better have 400Mb of disk space for the resulting data file, though, plus 500Mb for the source XML files, plus 4-5 hours of processing time (at least on a 550MHz Linux box). The exported ZClass product still doesn't seem to work, though; if you untar it in a new Zope installation, no Product is added when you start up Zope. Anyone else notice this problem? -- A.M. Kuchling http://starship.python.net/crew/amk/ What on earth is less likely than *two* committees to produce a seamless web of anything but intrigue and deficit? Who said "three committees"? -- Stan Kelly-Bootle, _The Computer Contradictionary_

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urgent! help! strange blockings
by Tino Wildenhain 02 Mar '00

02 Mar '00

Hello, I cannot get ride of those strange blockings of zope. This happens from time to time and leads some times to minutes without action from Zope. I increased threads pool and decreased it, I use a much bigger object cache (memory is not an issue on the machine) and I pured the database (with help of an extra machine) Zope stucks with about 18% processor use and does almost nothing at the moment. Any posibility for an dead-lock? Help is very appreciated! Configuration: Zope 2.1.4, ZODBC, Database-Size: 66MB (after purify) Some sessions with unsafed work, 50 threads for pool, NT 4.0 (ok, this sux, but we have to use ODBC with strange Databases) Tino Wildenhain

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why doesn't this work with tree tag
by Andy Heath 02 Mar '00

02 Mar '00

In the depths of a tree tag I want to pick up a property of the "current" object without acquisition if the property isn't present. This code seems to work when used not in a tree tag but when its in a tree tag it still finds the property from higher up in the acquisition space. <dtml-with this only> <dtml-if rubbish> <dtml-var rubbish> </dtml-if> </dtml-with> What gives? How can I do this? The version below doesn't fall over if the property isn't present on that object, it just finds it by acq. Code below should fall over but doesn't ---------------------------------- <dtml-tree expr="lists" branches=objectValues sort=order> <dtml-if "meta_type=='Folder'"> <dtml-var title_or_id> <dtml-else> <dtml-if "kind=='discussion'"> <A HREF="<dtml-var listURL>"> <dtml-var title_or_id></A> <dtml-else> <dtml-with this only> <dtml-var rubbish> </dtml-with> </dtml-if> </dtml-if> <dtml-if listinfo> (<dtml-var listinfo>) </dtml-if> </dtml-tree> Andy sorry for so many q's. I promise to give back when I can. -- ------------------------------------------------- Andy Heath a.k.heath(a)open.ac.uk The Open University +44 (0) 114 2885738

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rendering bgcolor tags
by Lucas Vogel 02 Mar '00

02 Mar '00

I have an html document that I created outside the Zope env. that has a table. One column of the table is blue, the background of the document is white. I can see the work I have done fine when I look at the document in Netscape, but when I load it into zope and look at it, the bgcolor for the table column isn't there. Am I doing something wrong, or is this a zope feature? -- Lucas Vogel lucas7(a)home.com ICQ: 44697169

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bobobase_modification_time one day back?
by Thomas Weiner 02 Mar '00

02 Mar '00

Am I the only one whose bobo_modification_time started today with /2000/2/29 instead of /2000/03/01? I create a new method Time_now: <dtml-var ZopeTime><br> <dtml-var bobobase_modification_time--> and the Output is: 2000/03/01 18:30:21.091 GMT+1 2000/02/29 18:30:5.198 GMT+1 Same appears in my Undo Log (February, 29th started again today) and so on. TIA, Thomas -- fon: ++49 (0)40 42878 3781 fax: ++49 (0)40 42878 2728

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Subclassing User
by ingo 02 Mar '00

02 Mar '00

Hi! Can anybody tell me anything about subclassing a UserObject? I have had some neat errors (including seg-faults and indefinite loops by just subclassing a ZClass from User Object) When I tried to insantiate a Subclass of UserObject Zope quit. (I did not change anything to the default constructors and expected something like "missing argument", but not an indefinite loop :) I am using Zope 2.1.4 on Linux/x86 (2.2.13) Thanks. Regards, Ingo.

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Patch to ZODBCDA
by Duncan Booth 02 Mar '00

02 Mar '00

A little while back I uploaded a patch to the ODBC Database Adaptor which (I claimed) fixed the Test tab on the management screens. Indeed it did, but unfortunately it broke a host of other things. Anyone who downloaded the patch the first time around may be interested to know that there is a revised version at http://www.zope.org/Members/Duncan/zodbcda_patch -- Duncan Booth duncan(a)dales.rmplc.co.uk int month(char *p){return(124864/((p[0]+p[1]-p[2]&0x1f)+1)%12)["\5\x8\3" "\6\7\xb\1\x9\xa\2\0\4"];} // Who said my code was obscure? http://dales.rmplc.co.uk/Duncan

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Re: [Zope] bobobase_modification_time one day back?
by Petr Knapek 02 Mar '00

02 Mar '00

>>>>> On Wed, 1 Mar 2000 21:42:24 +0100, "Martijn Pieters" <mj(a)digicool.com> said: Hi all, I have the same problem. MP> From: "Thomas Weiner" <weiner(a)tu-harburg.de> >> Am I the only one whose bobo_modification_time started today with >> /2000/2/29 instead of /2000/03/01? >> >> I create a new method Time_now: >> >> <dtml-var ZopeTime><br> <dtml-var bobobase_modification_time--> >> >> and the Output is: >> >> 2000/03/01 18:30:21.091 GMT+1 2000/02/29 18:30:5.198 GMT+1 >> >> Same appears in my Undo Log (February, 29th started again today) >> and so on. MP> 1: What is your timezone setting. It could be that dates are MP> displayed in a different timezone. Martijn, it is not problem of timezone setting. If yes I had to see the difference in past also. And it was OK. The problem started with 29.2. date. I think that it is a bug in bobobase_modification_time. The system time is OK, only problems with bobobase_modification_time. MP> 2: If you do your test from a DTML Method, you'll be shown the MP> modification date of the container it is called on. For an MP> explanation, see: MP> MP> http://www.zope.org/Members/michel/HowTos/DTMLMethodsandDocsHowTo MP> and other How-To's on DTML and Aqcuisition. MP> Martijn Pieters | Software Engineer mailto:mj@digicool.com | MP> Digital Creations http://www.digicool.com/ | Creators of Zope MP> http://www.zope.org/ | The Open Source Web Application Server MP> --------------------------------------------- MP> _______________________________________________ Zope maillist - MP> Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No MP> cross posts or HTML encoding! ** (Related lists - MP> http://lists.zope.org/mailman/listinfo/zope-announce MP> http://lists.zope.org/mailman/listinfo/zope-dev ) Petr -- Petr Knápek PVT.NET, e-mail: petr.knapek(a)pvt.net, tel:+420-5-41 558 394 PVT a.s. - pvt.net, Veveří 102, 659 10 Brno, Czech Republic

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Problems installing Zope
by Steven Purchase 02 Mar '00

02 Mar '00

Having just successfully installed and setup Zope and Squishdot on an 486 Linux box (Debian packages made it dead easy), I thought I'd move over to a SUN box as it is quicker and I want to run a discussion group for the intranet here. [SunOS 5.5.1 Generic sun4m sparc SUNW,SPARCstation-10] After installing the latest python (and then re-compiling with threads, doh) I unpacked Zope-2.1.4-src and ran wo_pcgi.py. Everything seemed to go fine, so I simply fired it up using ./start. After a couple of seconds Zope (okay, Python) falls over reporting that the ExtensionClass module couldn't be found at the import in ZODB/__init__.py. Actually, after investigation, none of the modules would load from an import even though they all have .so files present in the lib/python dir. Now, I don't know a thing about Python so I don't know where to look to sort this out... Any ideas? Is it something to do with shared libraries being handled wrongly on SunOS 5? Only other thing I can think of is search paths. I install outside of /usr, but I can't imagine that would be a problem. Do I need to set a PYTHONPATH or something? Help... -- Steve. "Normal people ... believe that if it ain't broke, don't fix it. Engineers believe that if it ain't broke, it doesn't have enough features yet." ----- Scott Adams, The Dilbert Principle

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RE: [Zope] Options for handling concurrency?
by Martijn Pieters 02 Mar '00

02 Mar '00

> My methods are more complex than simple ZSQL lookups. I need to do a > tree traversal through a database to get the relevant items to > display. So I need to do nested SQL queries.The first Zope attempt > was ; > > <dtml-var standard_html_header> > <dtml-if child><dtml-var show_html> > <dtml-in > expr="Actors.SQL.get_children(parent=child)"><dtml-var show_html> > <dtml-in > expr="Actors.SQL.get_children(parent=child)"><dtml-var show_html> > <dtml-in > expr="Actors.SQL.get_children(parent=child)"><dtml-var show_html> > <dtml-in expr="Actors.SQL.get_children(parent=child)"><dtml-var > show_html></dtml-in get_children L4></dtml-in get_children > L3></dtml-in get_children L2></dtml-in get_children L1> > <dtml-else> > <form action='cascade2' method=post> > child <input type=text name=child size=10> > </form> > </dtml-if> > <dtml-var standard_html_footer> > > That is, it's a nested loop of ZSQL methods and show_html is an > external method that displays HTML dependant on the contents of a > DTML document in the ZODB (this is *so* cool - I can change the look > and feel of 'elements' with triviality...) > It took about 27 seconds to render a (120k) document. > > Using a full External Method solution, with calls to DBH.query (and a > one-time lookup for all the DTML 'templates' in the ZODB) it took > about 2 seconds (it's not completely debugged though! :). > > So, I'm *not* calling ZSQL methods from an External method, I'm using > direct connections to the database using Python libraries. Obviously, > I lose a lot of Zope goodies here, but I really need that speedup... So, if I understand you correctly, your EM's call query on the DA object itself, not using the ZSQL Methods. Then you have no cache whatsoever on those queries. Is there no way you can use a ZSQL Method here anyway? Just a self.nameOfZSQLMethod(arguments) might speed things up here. Also, I don't know how your recursive query will work within the one thread of a HTTP request. What python libraries do you use? -- Martijn Pieters, Software Engineer | Digital Creations http://www.digicool.com | Creators of Zope http://www.zope.org | mailto:mj@digicool.com ICQ: 4532236 | PGP: http://wwwkeys.nl.pgp.net:11371/pks/lookup?op=get&search=0xA8A32149 -------------------------------------------

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