May 2001 - Zope - Zope lists

SQL Session first time load
by Paul Zwarts 16 May '01

16 May '01

Hi all, Is there a reason why you cannot query _ZSession on the first page access? Observe: <var header> <var contentstuff> <var footer> Header: call Session Footer use a ZSQL session that logs a pageload data including the PreciseTime as PK, and Zsession as foreign key and the page address with query string. What happens..: First time you load, you get a key error for _ZSession. To fix it: Reload page and all resumes as should. But I especially want to record the entry point for a browser... which cannot happen if only the second load can be logged. Paz

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RE: [Zope] ZCatalog (2.3.1) won't acquire method from parent fold er?
by sean.upton＠uniontrib.com 16 May '01

16 May '01

Casey Duncan Wrote: >>>>> Solution: write a wrapper method in your class that looks for a DTML method to index against. If it finds one then call it or a default DTML method passing self as the client like so: defaultSearchTextWeighted = Globals.HTMLFile('dtml/searchTextWeighted', globals()) def searchText(self): """Look for a DTML Method to call""" if hasattr(self, 'searchTextWeighted'): stw = self.searchTextWeighted else: stw = self.defaultSearchTextWeighted return stw(self) >>>>> Forgive my ignorance here, but this will evaluate/render the method (using the correct context of the class instance itself), and proxy the rendered method to the catalog machinery because it is a python class, post-rendered? Or is it that this wrapper returns the DTML method itself, wrapped in a correct context by which catalog renders the method? Sean

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Re: [Zope] Problem with Automatic Cataloging Example in ZopeBook
by Christian Wittern 16 May '01

16 May '01

Chris McDonough <chrism(a)digicool.com> writes: > Hi Chris, > > Hmmm... I haven't tried this, but I'm afraid I believe you. :-( Are you > saying that anything that is a property of an instance of a ZClass is > not indexed in the catalog? Does this happen with any particular type > of ZClass properties or only a certain kind? What if you add a > PythonScript (with no parameters) to a ZClass as a method and make it > return a string? Does that get indexed? Would you be kind enough to > try to make that distinction and report back? I am following the example in the ZopeBook, Chapter 9 to the letter: Adding Product News, Creating ZClass NewsItem, Baseclasses: ZObject, CatalogAwareBase Adding a propertysheet News to NewsItem Adding properties to this sheet: content: text author: string date: date I then create an instance of Catalog, with Indexes: author FieldIndex content TextIndex date FieldIndex title FieldIndex and a table of Metadata absolute_url author date title I also create a ZSearch Interface with a FOrm and a Report method If I now add a NewsItem to my ZOpe somewhere, I can see the item appearing in my Catalog, when I click on the Catalog-tab. When I now click on the item in the catalog, I see the catalog record for this item. This tells me that the fields author and title are empty in the section Metadata Contents and author, title and content are empty in the section Index Contents. Now trying the trick with the PythonScript: Adding a PythonScript "test" as method to NewsItem The script just returns a string, without any params. Adding a TextIndex "test" to the Catalog Adding a field "test" to the Metadata table With this in place, I now add another NewsItem to my Zope, and add some dummy content. Looking at the index record reveals: Indeed, the string returned from the "test" script is in place, both in the Index and in the Metatable record. -- Institute for Research in Humanities, Kyoto University 47 Higashiogura-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8265, JAPAN

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Testing if a string isn't empty
by Gitte Wange 16 May '01

16 May '01

Hello, I am trying to make some dtml code that tests if a string contains text (because if the string is empty it must be set to contain 'Clipname'). Right now the code looks like this: <dtml-if expr="mc_name == ''"> <dtml-let mc_name="'Clipname'"> <dtml-call sqlAddClip> </dtml-let> </dtml-if> How do you do it - because the above doesn't work. Regards, -- ************************ Gitte Wange Jensen System Squid Developer MMManager Aps +45 29 72 79 72 gitte(a)mmmanager.org ************************

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RE: [Zope] Newbie Q: Zope Best Practices
by Max Møller Rasmussen 16 May '01

16 May '01

> From: davelehman(a)loewen.com [mailto:davelehman@loewen.com] > 3. Store the stories as objects in the ZODB-- not quite sure what i'm > talking about on this one yet, but SquishDot does something like > this, and i've been reading through the squishdot source trying to > figure it out. Is this substantially the same, or different than (1)? If you have a site that is heavy transactional with many writes pr. second like a shopping site, or you have a big catalogue with lots and lots of rows, or you have data in an ordinary dbms that you need to use for historical reasons, or because of company policy or whatever. Then you should use an ordinary rdbms. If you want to publish content on the web you should just juse ZODB. Far less hazle, and you can integrate the two approaches later where you have some parts of your data in the ZODB and other parts in an RDBMS. Regards Max M

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Newbie Q: Zope Best Practices
by davelehman＠loewen.com 16 May '01

16 May '01

I wish to humbly solicit some advice from some seasoned Zope developers: After reading most of the Zope documentation I could find, I'm creating an intranet application as my first Zope websites. I'm trying to make a news page that would be suitable (read "simple enough") for a non-techy to maintain. So a "news admin" would be able to add/edit/remove news stories. And a summary of all current news stories would show up on the main "news" page. Each summary would have a title, abstract and a link to the full news story page. OK, so anticipating that we would like to archive the news stories and make them searchable, and that there will be quite a few of them (several a day), what would be the best way to implement this? Here are the ways i've though of, some of which i've tried implementing to some extent: 1. Create a "NewsStory" ZClass. The newsadmin can login to the Zope management interface and select "News Story" from the add list. Each news story creates a separate object in the "news" folder. This works OK initially, but after a while, there would be tons of items in this folder which would be a little unwieldly to manage. Also, it seems using a ZClass for anything is sneered at by seasoned developers? 2. Store all stories in an RDBMS. I mocked this up using ZGadfly, and I suppose it would be almost as easy to hook up to MySQL instead. Would this be the "right" way to do it, or is it better to store the stuff right in your ZODB instead? 3. Store the stories as objects in the ZODB-- not quite sure what i'm talking about on this one yet, but SquishDot does something like this, and i've been reading through the squishdot source trying to figure it out. Is this substantially the same, or different than (1)? I know i'm a complete newbie on this one-- would anyone care to offer some advice on how to proceed? Regards, Dave

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Re: [Zope] [ANN] ZShell 0.9
by Jerome Alet 16 May '01

16 May '01

With your permission I CC this message to the list: On Wed, 16 May 2001, Gregor Hoffleit wrote: > I think Hannu has some point here (even if he doesn't completely understand > the situation ;-): I agree, and I'm sorry that my intentions have been misunderstood, you should be able to read my explanations in zope(a)zope.org in a few minutes. > According to http://www.gnu.org/philosophy/license-list.html, the ZPL is > incompatible with the GPL. I.e. if I license your zshell and jaxml stuff > according to the terms of the GPL, you don't give me permission to link the > stuff with ZPL stuff--at least in the interpretation of the FSF, which seems > to consider even running scripts as a special kind of linking... IMHO this is an error from the FSF, and being a fanatic GPL defenser like I am, it's hard for me to write this. I repeat my point here: you can download any GPLed software sources, compile it with a proprietary compiler, use it under a proprietary operating system, and all is allowed, except that if you redistribute the software even along with the compiler and operating system, the software's license must be GPL, while the compiler's and operating system's ones remain "proprietary" because the software isn't in any way a part of either the compiler or the operating system in itself. Then, following this (my) reasoning, you can download my GPLed code and install it to run it from Zope without any restriction, provided you redistribute my code under the GPL and you don't use parts of my code from your own code: just click on the "Test" tab for my external method and it's ok for me (and probably not for the FSF): my code isn't any part of either Zope's code nor your own software's code. But if you copy parts of my code to include it in your own code or inside Zope's core, then the GPL applies. > I.e. with the current license terms of jaxml and zshell, I can't be sure > that you won't sue me for using this stuff with Zope. I understand your point, but what would be the reason to publish GPLed code if nobody can use it ? Of course you're welcome to use it with Zope ! > In order to work around this problem, you could add a special exception > clause to the licenses, something that explicitely allows linking with Zope. Yes, that's a good idea and I'll add something like this. > I was informed that DC is thinking about changing to Zope license to > something that's compatible with the GPL. Perhaps you could help me lobbying > them that this is indeed necessary and important. No problem: Hey DC Folks ! Just do it ! Please GPL Zope right now ! IMHO, GPLing Zope shouldn't force anyone to release its code under the GPL: after all, compiling a proprietary software with a GPLed compiler (gcc) is perfectly allowed, so why should this be different with Zope ? ;-) bye, Jerome Alet

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auto increment in a Gadfly database?
by matt standish 16 May '01

16 May '01

Is there a way to add a auto_increment column in a Gadfly database as you can in MySQL? I have been searching the archives, maybe I am not using the correct terminology. Any help anyone could provide would be great. Thanks.

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RE: [Work-around] (was Re: [Zope] Will the inheritance relationsh ip will be preserved after export/import?)
by NABETH Thierry 16 May '01

16 May '01

Hello Iap, >> This external method helps a zclass to change the old reference of its base class (an instance of ZClass) to the new one in "new" ZODB. Thank you very much. I will try it when I will have a little bit of time. (and in particular profit to update to the version of Zope in which you can define DTML-python methods). >> "Zclasses are not robust solutions they mostly seem designed for trivial solutions by largely non programmers." If we except this BUG and difficulty with DTML Zope to change the inheritance hierarchy, and given that now you can define Python method directly from with the Zope environment, Zope could have been a very good (flexible) environment to design complex applications. I personaly believe that there should exist some way to have very flexible environments to design complex application. Zope has provided us with a very interesting approach (in particular how to combine object orientation and persistance in a system in a very straighforeward way), but not yet enough unfortunatly :-). Thanks again for your suggestion. Thierry Thierry Nabeth Research Fellow, INSEAD CALT (The Centre for Advanced Learning Technologies) http://www.insead.edu/CALT/ PS: I apologize with this mime attachement, but it happens even when I use plain text as a format. I have not found anyway to fix this in Outlook. (Microsoft software !!!).

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RE: [Zope] Testing if a string isn't empty
by Schmidt, Allen J. 16 May '01

16 May '01

I have a similar need...with a twist. I was going to just wrap the whole thing in a dtml-try block but thought I would ask. I have a folder of images called 'images'. I have a database field called LOGO and a form field called LOGO in an update form that is loaded with values retrieved from the DB. When submitting the form, in my ZSQL method, I check to see if there is an image name (text) in the DB field LOGO. If there is, see if it matches an image object with the same name in the 'images' folder. If it matches, and there is a NEW image (selected from the file system with a 'type=file') that needs to replace the image object of the name in the LOGO form field. If there is a value in the LOGO database field, but no image object exists with that name, then use the selected image filename chosen to create a new image object with that name as the object ID. Thanks Allen -----Original Message----- From: Phil Harris [mailto:phil.harris@zope.co.uk] Sent: Wednesday, May 16, 2001 8:33 AM To: Gitte Wange; zope(a)zope.org Subject: Re: [Zope] Testing if a string isn't empty My first take would be something like (untested): <dtml-unless mc_name> <dtml-call "REQUEST.set('mc_name','Clipname')"> </dtml-unless> Phil ----- Original Message ----- From: "Gitte Wange" <gitte(a)mmmanager.org> To: <zope(a)zope.org> Sent: Wednesday, May 16, 2001 1:22 PM Subject: [Zope] Testing if a string isn't empty > Hello, > > I am trying to make some dtml code that tests if a string contains text > (because if the string is empty it must be set to contain 'Clipname'). > > Right now the code looks like this: > <dtml-if expr="mc_name == ''"> > <dtml-let mc_name="'Clipname'"> > <dtml-call sqlAddClip> > </dtml-let> > </dtml-if> > > How do you do it - because the above doesn't work. > > Regards, > -- > ************************ > Gitte Wange Jensen > > System Squid Developer > MMManager Aps > +45 29 72 79 72 > > gitte(a)mmmanager.org > ************************ > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://lists.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope-dev ) _______________________________________________ Zope maillist - Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )

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