March 2000 - Zope-Dev

Re: [Zope-dev] Globally unique id's in Zope in a new way
by Jason Spisak 09 Mar '00

09 Mar '00

Ross, On my dual SMP PII 350 I still only create 48 objects using this short code per second. <dtml-var standard_html_header> <dtml-in "_.range(0,1000)"> <dtml-with "ClientClass.createInObjectManager(_.getitem('unique_id',1), REQUEST)"> <dtml-var id> </dtml-with> </dtml-in> <dtml-var standard_html_footer> _.float works terrific. I suppose a blend of the two techniques would give a pretty solid id, even on very fast parallel machines, because they would have to get the same random number from a large amount of possiblities in under a millisecond. Thanks for both your help on this. <dtml-var "_.str(_.float(ZopeTime())) + _.str(_.whrandom.randint(1,100000))"> All my best, Ross Lazarus writes: > ZopeTime() to float to string conversion works even better since you get > milliseconds - there is always the risk that in an SMP processor > environment, you JUST might get bitten, but that's also true of any > hash algorithm - you're down to probabilities which are exceedingly > small. > > Of course, you could enclose your new id generating code (hash or float > time) in some loop which checks to see if an object with that id > exists, if it does, wait a small random time, and add a letter to the > end of the string, retest and loop until it IS unique, then create the > object. The time taken to do all that means you could be "safe" from > multiple processors doing precisely the same thing at precisely the > same time.. > > jason spisak <44-(a)hiretechs.com> wrote: > original article:http://www.egroups.com/group/zope/?start=25478 > > Zopsters, > > > > numbers, employee numbers, etc...) so I don't like to use a counter > for > > ids. The ZopeTime() to int to string conversion works unless you are > > programatically creating multiple items in the same folder, and have a > > descent processor. I have derived the following bad hack from the > code > > Jason Spisak CIO HireTechs.com 6151 West Century Boulevard Suite 900 Los Angeles, CA 90045 P. 310.665.3444 F. 310.665.3544 Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.

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Can't directly call an image from an acquired dtml document ??
by Andrew Wilcox 09 Mar '00

09 Mar '00

This behavior so startled me that I installed a fresh copy of 2.1.4 and verified that it doesn't work in a clean installation. On my system, I have: / root folder | |-- icon.gif (Image) | |-- display (DTML Document) | |-- abc (Folder) Where "display" is simply: <dtml-var standard_html_header> <dtml-var logo.gif> <dtml-var standard_html_footer> Now, http://mysystem.com/display works fine, displaying the logo, while http://mysystem.com/abc/display gives an AttributeError for __call__: Traceback (innermost last): File D:\Zope\David\lib\python\ZPublisher\Publish.py, line 214, in publish_module File D:\Zope\David\lib\python\ZPublisher\Publish.py, line 179, in publish File D:\Zope\David\lib\python\Zope\__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File D:\Zope\David\lib\python\ZPublisher\Publish.py, line 165, in publish File D:\Zope\David\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: display) File D:\Zope\David\lib\python\ZPublisher\Publish.py, line 102, in call_object (Object: display) File D:\Zope\David\lib\python\OFS\DTMLDocument.py, line 166, in __call__ (Object: display) File D:\Zope\David\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: display) AttributeError: (see above) Should I report this in the collector? Or is this not supposed to work? Thanks, Andrew

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Custom Formats
by James W. Howe 09 Mar '00

09 Mar '00

I originally asked this question on the Zope mailing list but didn't receive any replies. Hopefully someone on this list might be able to help... I'm interested in creating a custom format similar, but more limited, than the structured-text format. Is there a way to accomplish this without hacking on the base Zope code? From the description I found in the Zope documentation, it says that the value of a custom format is the "method name evaluated upon the object to be inserted". If I'm accessing a DTML_method wouldn't this mean that I would have to add something to DTML_Method (or create my own subclass?) Is there a better way to accomplish this task? What I'm trying to do is provide a way for my user to enter textual information without requiring the use of HTML. I want visible paragraphs to be translated into <p></p> delimited paragraphs, standard URL specifications to get translated into real links, and I want to provide a small number of additional formatting options. Any ideas on good ways to accomplish this task would be appreciated. Thanks. James W. Howe mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103

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Re: Excuses
by Tom Neff 09 Mar '00

09 Mar '00

Tom Deprez wrote: > I'm terribly sorry if I annoy somebody here on the list with all my stupid > q'ns. Apologies are nice, but comprehension would be better. There is a separate mailing list (zope(a)zope.org) for questions and answers about USING Zope. This list (zope-dev(a)zope.org) is supposed to be for discussing DEVELOPING Zope, i.e., writing and debugging new versions of Zope itself and associated modules. With rare exceptions (like when a newbie stumbles on a serious bug) you should only post here if you already understand how to USE Zope, and you want to help code Zope internals. There are no stupid Zope questions, but there are wrong addresses for posting them.

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Re: [Zope-dev] Re: Excuses
by Rik Hoekstra 09 Mar '00

09 Mar '00

-----Original Message----- From: Martijn Pieters <mj(a)digicool.com> To: Tom Neff <tneff(a)bigfoot.com>; zope-dev(a)zope.org <zope-dev(a)zope.org> Cc: Tom Deprez <tom.deprez(a)uz.kuleuven.ac.be> Date: donderdag 9 maart 2000 7:17 Subject: Re: [Zope-dev] Re: Excuses From: "Tom Neff" <tneff(a)bigfoot.com> > Tom Deprez wrote: > > I'm terribly sorry if I annoy somebody here on the list with all my stupid > > q'ns. > > Apologies are nice, but comprehension would be better. There is a separate > mailing list (zope(a)zope.org) for questions and answers about USING Zope. > This list (zope-dev(a)zope.org) is supposed to be for discussing DEVELOPING > Zope, i.e., writing and debugging new versions of Zope itself and associated > modules. With rare exceptions (like when a newbie stumbles on a serious > bug) you should only post here if you already understand how to USE Zope, > and you want to help code Zope internals. > > There are no stupid Zope questions, but there are wrong addresses for > posting them. At the moment the topic of this list isn't that focused, and this is not necessarily wrong. Currently, this list discusses Zope internals developement, and the development of Zope products. So, Tom was never off topic. [RH]Moreover, Tom asked his original question about 15 times on other lists and only on this list his cry for help was answered. Small wonder then that he thinks this one is his best bet ;-) Rik

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Large file FTP STOR
by seant＠factory.dk 09 Mar '00

09 Mar '00

Zope 2.1.2 linux2 When attempting to upload a 8 MB file through FTP I get an FTP error (426). No exception was reported on stdout or Z2.log. I put a breakpoint in the webdav PUT and in the ObjectManager _setObject methods but neither were hit, so I assume that the error is happening somewhere in the publish code, but investigating quickly exceeded my zenness factor. Uploading the file through a browser as a File object works (though it takes significantly longer). Has anywone seen this before? I have 2 days to get this working, so any insight would be appreciated. Thanks, -Sean P.S. I am working with very large media files within the ZODB and from the filesystem, served though Zope. I am finding quite a few quirks and if anyone else is working with large files, I would love to compare notes.

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Re: [Zope-dev] ZCatalog
by Anthony Baxter 09 Mar '00

09 Mar '00

>>> Tom Deprez wrote > Is there a way to see which keywords, etc are indexed in a catalog? > > eg. Let's say I indexed the title of a class and now I want to see all the > titles in the catalog (so I can see if I'm programming correctly) You can use 'uniqueValuesFor()' to list values for an index. As a simple tool, you could add the 'Query' tab patch to ZCatalog, get it from http://www.zope.org/Members/anthony/patches/ Anthony

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RE: [Zope-dev] ZCatalog: Forgot to mention
by Jason Spisak 08 Mar '00

08 Mar '00

Tom, Michel can correct me if I'm wrong here, but I believe only properties get indexed in the Catalog. YOu can also only retuen properties as meta_data. If you want the value of a given method that comes up fora Catalog result, you do this: <dtml-in "Catalog.searchResults(title='foo')"> <dtml-with "resolve_url(getpath(data_record_id_),REQUEST)"> <dtml-var getParentEx> </dtml-with> </dtml-in> This will return the value of getParentEx method for the record returned. All my best, -- Jason Spisak 444(a)hiretechs.com

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Re: [Zope-dev] TinyTable object type is Shared.DC.ZRDB.Results.Results???
by Itai Tavor 08 Mar '00

08 Mar '00

Ty Sarna wrote: >In article <v04220800b4ea072f64f5(a)[192.168.0.2]>, >Itai Tavor <itavor(a)bigpond.net.au> wrote: > > Hi, > > > > I create a TinyTable object. Then I run the following code: > > > > <dtml-in "objectItems('TinyTable')"> > > <dtml-var sequence-item fmt=html-quote><BR> > > </dtml-in> > > > > I get this: > > > > <Shared.DC.ZRDB.Results.Results instance at 8628c78> > >This is as expected, really. When you say <dtml-var foo>, if foo is >callable then it's called automatically and the results are returned. > >When you say <dtml-var sequence-item>, the sequence-item is a TinyTable. >Since TinyTables are callable, returning a Results instance, that's what >you get. Of course. Make perfect sense. Now I know how to get the object's icon - instead of <dtml-with obj><dtml-var icon></dtml-with> I just do <dtml-var "obj.icon">. Thanks! Itai -- Itai Tavor -- "Je sautille, donc je suis." -- itavor(a)vic.bigpond.net.au -- - Kermit the Frog -- -- "What he needs now is understanding... and a confederate victory" -- -- Dr. Jacobi, Twin Peaks --

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DTML <-> External Method
by Tom Deprez 08 Mar '00

08 Mar '00

Hi, Can a DTML Method also return a result as an External Method can? Regards, Tom.

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