August 2000 - Zope - Zope lists

Linux and ODBC
by Tony Corrente 26 Aug '00

26 Aug '00

Hello.. I am currently using the openlink ODBC drivers to access Progress DB's on a HPUX System from A Linux Web Server using Apache and PHP4. It Works... The rest of my site has been moved to Zope. Everything I've read states that the Zope DA's for ODBC only run under the Win32... Is anyone working on this ?? or how do I do it from Linux ?? I don't want to install a N(asty)T(hing) server if I can avoid it.. Thank you. Tony Corrente Web Administrator OMC Europe V.O.F. Drongen Belgium .

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How to implement a round through the whole web site
by Christian Leutloff 26 Aug '00

26 Aug '00

Hi, I want to add a round to a small Zope based web site. Therefor I would like to add a prev and a next button on each page. So it is possible to start on the first page and then move on to the next one by clicking on the next button. After some clicks on the next button I'm sure to have visited all pages. I want to realize this goal through adding an attribute named sequence (´seq´) to every DTML document that should be reached through the round. The value is a 4 digit number that defines the order in which the pages should appear. Then I've started to implement a method using DTML to generate the hyperlinks for prev/next. The strategy would be to determine the sequence number of the actual document. Afterwards all documents are searched and each id is compared to the actual one. The results should be saved in variables that could be used to set up the links after all documents have been processed. My problem is now how to store the intermediate results in variables. I'm able to define a variable (myseq), but I'm not able to change the value afterwards: <-------- snip <dtml-call "REQUEST.set('myseq', 7L)"> <dtml-if "_.has_key('seq')"> <dtml-call "myseq = seq"> <-- wrong!!! Seq: <dtml-var seq>/ <dtml-else> sequence is missing! </dtml-if> <dtml-var myseq> <-------- snap What is the most efficient way to traverse all DTML documents in a given branch of a Zope server? Today I use something like this: <dtml-in "krawczak.objectItems('Folder')" sort=id> <dtml-in "objectItems('Folder')" sort=id> <dtml-in "objectItems('DTML Document')" sort=id> <br> <dtml-var id>, Properties: <dtml-in "propertyMap()"> <dtml-var "_['sequence-item']['id']">, </dtml-in> </dtml-in> </dtml-in> </dtml-in> Are there better solutions? Do you know of a predefined way to implement the round through the web site? Thank you Christian -- Dipl.-Ing. Christian Leutloff, Aachen, Germany christian(a)leutloff.de http://www.oche.de/~leutloff/ leutloff(a)debian.org Debian GNU/Linux - http://www.de.debian.org/

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ANN: ZUBB (Zope Ultimate Bulletin Board) 0.5.0 Release
by J. Atwood 26 Aug '00

26 Aug '00

I have uploaded the update to ZUBB. Both the changes and readme are linked below. There are a few major presentation and feature changes but It still does not work with Zope 2.2. I will work on that when I have a chance (if anyone would like to help that would be great). http://www.zope.org/Members/BwanaZulia/ZUBB/ http://www.zope.org/Members/BwanaZulia/ZUBB/README http://www.zope.org/Members/BwanaZulia/ZUBB/CHANGES As always the sample / test / development board is http://www.bwanazulia.com/kenya/discussions/test/ I have about 6 of these boards in production environments and things seem to be pretty stable as I work to squash bugs. My major concern for now is to see how many posts it can handle before I have to move to something like the SQL based version (which is still in the basic planning stages and will be a whole new game). Suggestions, comments are welcome. J

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ZCatalog - OR'ing on different colums (indices)
by Aleksander Salwa 25 Aug '00

25 Aug '00

Is there any better method of OR'ing on differend indices in quering ZCatalog, then the method described in 'Advanced ZCatalog Searching' How-To: <dtml-let res1="MyCatalog(title=userInput)" res2="MyCatalog(PrincipiaSearchSource=userInput)" res3="MyCatalog(someProperty=userInput)" results= "res1[:_.len(res1)] + res2[:_.len(res2)] + res3[:_.len(res3)]"> <dtml-in results> ... </dtml-in> </dtml-let> This seems to me too expensive - here three searches are made. Is there - or should be added - any support for it in ZCatalog ? Another fault of this method are superfluous repetitions in results - if some catalogued object matches search pattern on more then one index. It seems to me to be common case, when we show to user simple search form with only one input (that is where 'userInput' came from) and 'Go!' button. User don't want to know, that we have our data splited in many properties. But on Zope side it's very good to have it structured in that way - so how to reconcile these things ? ololo(a)zeus.polsl.gliwice.pl /--------------------------------------\ | `long long long' is too long for GCC | \--------------------------------------/

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FW: Simple(?) Syntax Question (dtml-in)
by Spicklemire, Jerry 25 Aug '00

25 Aug '00

Actually, there are some extraneous "" in the prior post. Here's a corrected version: <dtml-in valid_prj> <dtml-call "REQUEST.set('val_prj_seq_item', _['sequence-item'][0])"> <OPTION value="&dtml-val_prj_seq_item;"><dtml-var val_prj_seq_item></OPTION> </dtml-in> I also should have mentioned that this approach allows use of the &dtml-x; "entity syntax", within tags..

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Simple(?) Syntax Question (dtml-in)
by Spicklemire, Jerry 25 Aug '00

25 Aug '00

Tim asked: >I want to only provide the first item of each list in this >SELECT: You can use Python "slice" syntax, where the first item of a sequence (index position 0), is indicated like: listname[0] try: <dtml-in valid_prj> <dtml-call "REQUEST.set('val_prj_seq_item', _['sequence-item'][0])"> <OPTION value="&dtml-val_prj_seq_item;"><dtml-var "val_prj_seq_item"></OPTION> </dtml-in>

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ANNOUNCE: Zope 2.2.1 released
by Brian Lloyd 25 Aug '00

25 Aug '00

Hi all, Zope 2.2.1 has been released - you can download it from Zope.org: http://www.zope.org/Products/Zope/2.2.1/ This release contains many bug fixes, including the fixes covered by all Hotfixes to date. Special thanks go to Dieter Maurer, Adam Karpierz, Jeff Sasmor and others who have been prolific patch submitters over the last few weeks. For more information on what is new in this release, see the CHANGES.txt and HISTORY.txt files for the release: http://www.zope.org/Products/Zope/2.2.1/CHANGES.txt http://www.zope.org/Products/Zope/2.2.1/HISTORY.txt Note that we have also posted "diff" updates as .tgz files that will let you easily upgrade an existing 2.2.x site. These updates are available for those currently using the 2.2.x source release or the 2.2.x binary releases for either solaris or linux. To apply a differential update to your site: - download the appropriate .tgz file from zope.org - shutdown your Zope process - copy the .tgz to your Zope directory and extract it - run w_pcgi or wo_pcgi *if you are not using a binary release* - restart your process Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Oracle ZODB (Paul's talk in Paris)
by Satheesh Babu 25 Aug '00

25 Aug '00

Hi folks, I read the mail about EuroZope conference. Notes on Paul's speech says "they have an Oracle ZODB backend. They have deployed it. Pending documentation..." Way to go DC! WHERE IS IT????? I searched in CVS, couldn't find it at all... If anyone can point me towards this, it'll be greatly appreciated? Many thanks in advance vsb

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Re: [Zope] speeding up dtml-tree <00b001c006da$d19c4310$6703a8c0@torch>
by Dieter Maurer 25 Aug '00

25 Aug '00

Clinton Roy writes: > .... external method restrictions .... > I'm losing faith people.. Maybe, you should not. There are more ways to build extensions than external methods in "Extension" directories. Each way has its advantages and drawbacks: Type Web Manageable requires restart DTML Methods yes no ZClasses yes no External methods partly no Products partly yes Python Modules no yes The restrictions for source files in the Extension directories are documented together with a description what to do to circumvent the restrictions: These source files are not imported as standard Python modules but they are read in and executed. As a consequence, Zope may simply reread and reexecute them when they changed. A restart is not necessary. If they could be used like full Python modules, then it would be very difficult to do this in a safe manner unless the Python import and lookup mechanisms are changed. This might be possible but difficult. On the downside, instances of classes defined in these source files can not be pickled (and therefore stored in the ZODB). The pickle mechanism does not understand Zope's read and execute but requires standard Python module import. The workaround: define the classes (!) you need for ZODB objects in true Python modules. The documentation suggests to define them in a properly named subpackage of "Shared" such that maintenance will not become a nightmare. Yes, changes to true Python modules (and therefore to your classes) require a Zope restart. But, hopefully, you will not change your classes too often. You can instantiate your classes, i.e. build instances from them, in external methods, i.e. in source files located in an Extension folder. There is no need to have the same code at two places! Classes for picklable objects or infrastructure to be used in several source files in true Python modules, everything else (if you want) in external methods. Each tool has its strengthes and weaknesses. Know them and use the right tool for your task. This applies both to (sub-)tools inside Zope (e.g. external method versus product versus Python module) as well as to Zope itself (versus ASP, PHP, JSP, ...). Dieter

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Re: ZCatalog - OR'ing on different columns (indices)
by Steve Alexander 25 Aug '00

25 Aug '00

Aleksander Salwa wrote: > Is there any better method of OR'ing on differend indices in quering > ZCatalog, then the method described in 'Advanced ZCatalog Searching' <deletia> > > It seems to me to be common case, when we show to user simple search form > with only one input (that is where 'userInput' came from) and 'Go!' > button. User don't want to know, that we have our data splited in many > properties. But on Zope side it's very good to have it structured in that > way - so how to reconcile these things ? I use more than one ZCatalog at a time. One called SiteSearch stores full-text-search information on all the objects in a site. Then, I have other ZCatalogs for domain-specific searches. I use ZPatterns to do this. My objects are derived from DataSkins. I use CatalogTriggers to index my objects in the appropriate catalogs. CatalogTrigger is from Itamar Shtull-Trauring's ZPAddons package. (There will be a new version of this, renamed DataSkin addons released this weekend.) You could also modify CatalogAwareness.py to make an object aware of several catalogs at once. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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