August 1999 - Zope - Zope lists

ZClass instance 'Add' button doesn't work
by Jonothan Farr 27 Aug '99

27 Aug '99

I am running Zope 2.0b5 on Windows NT. I tried the following: - Created a new product using the Control Panel/Product Management interface. - Created a new ZClass (call it WidgetContainer) within that product which is derived from ZObjectManager - Created another new ZClass (call it Widget) inside that ZClass. - Added a new instance of WidgetContainer to the root using the 'add item' interface. - Click on myWidgetContainer. - Click the add button to add a new Widget to the container. - I get the following error: "Zope has encountered an error while publishing this resource. Resource not found" Here's the traceback: Traceback (innermost last): File C:\Program Files\ZopeTest\lib\python\ZPublisher\Publish.py, line 212, in publish_module File C:\Program Files\ZopeTest\lib\python\ZPublisher\Publish.py, line 179, in publish File C:\PROGRA~1\ZOPETEST\lib\python\Zope\__init__.py, line 199, in zpublisher_exception_hook (Object: RoleManager) File C:\Program Files\ZopeTest\lib\python\ZPublisher\Publish.py, line 151, in publish File C:\PROGRA~1\ZOPETEST\lib\python\ZPublisher\BaseRequest.py, line 426, in traverse File C:\Program Files\ZopeTest\lib\python\AccessControl\User.py, line 375, in validate (Object: RoleManager) File C:\PROGRA~1\ZOPETEST\lib\python\ZPublisher\HTTPResponse.py, line 510, in notFoundError NotFound: (see above) >From looking through the code in the traceback, it looks like a problem with permissions. At line 375 in User.py, it looks like roles is _what_not_even_god_should_do, causing the NotFound exception to be thrown. Can anyone help me figure out what's going wrong here? It seems like it should 'just work'. Thanks, Jonothan Farr RealNetworks, Inc. jfarr(a)real.com

1 0

does tree-tag's state string expire in some case when tree's structure doesn't change?
by Lauri Posti 27 Aug '99

27 Aug '99

Hi. I have litte difficulties with tree tag. I'm using tree tag the way it is used in ZBook with the only difference that I'm navigating in sql method instead of Zope folder. The url is something like /whatever/sql_method/oid/7/dtml_meth_with_tree?tree-s=somethin&..... Everything works fine till some other browswer invokes some (any) method on object '/whatever'. then tree state variables become invalid, the following exception is raised: Error Type: AttributeError Error Value: 'tuple' object has no attribute 'append' and in traceback: File /local/Zope-2.0.0b6-src/lib/python/DocumentTemplate/DT_With.py, line 148, in render (Object: _.namespace(asutus_id=1)) File /local/Zope-2.0.0b6-src/lib/python/TreeDisplay/TreeTag.py, line 154, in render (Object: a tree tag) File /local/Zope-2.0.0b6-src/lib/python/TreeDisplay/TreeTag.py, line 222, in tpRender (Object: NoBrains) File /local/Zope-2.0.0b6-src/lib/python/TreeDisplay/TreeTag.py, line 538, in apply_diff (Info: ([None, ([139374408, []],)], [2])) AttributeError: (see above) Any ideas what i might be doing wrong? Have I missed some important concurrency issue? Thans in advance, Lauri Posti, Linnet Systems Ltd.

1 0

RE: [Zope] Re: Saving Pipe3 object
by Alexander Staubo 27 Aug '99

27 Aug '99

Good point; it's the exact same reason why the second version of my Guest Counter product is broken. (Nasty -- I quality-assured the wrong script before sending it off to production ;-).) Is there any way to create objects that are persistent during the lifetime of the Zope process? I just realized that making the "guests" attribute of the GuestCounter class volatile doesn't really make sense, because the object isn't guaranteed to be cached, and the attribute shouldn't be persistent except in memory. I guess I can store the attribute as part of the product instance, but that's too dirty, unless it's the only way. -- Alexander Staubo http://www.mop.no/~alex/ "QED?" said Russell. "It's Latin," said Morgan. "It means, 'So there you bastard'." --Robert Rankin, _Nostramadus Ate My Hamster_ > -----Original Message----- > From: Phillip J. Eby [mailto:pje@telecommunity.com] > Sent: 27. august 1999 04:34 > To: zope(a)zope.org > Subject: RE: [Zope] Re: Saving Pipe3 object > > > At 04:30 AM 8/27/99 +0200, Alexander Staubo wrote: > >The underscore prefix should be enough: Your variable can be named > >_long_R_Pipe and it won't be pickled. > > > >DC uses the _v_ prefix convention for various stuff, possibly meaning > >"value"... Who knows. > > It stands for 'volatile'. In other words, the opposite of > 'persistent'. > _v_ attributes are not stored as part of an object's > persistent state in > the database. It's used for things which should only exist while the > object is loaded into memory. > > > _______________________________________________ > 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 ) >

4 3

replication, clustering, scalability
by Bill_Seitz＠mail.medscape.com 27 Aug '99

27 Aug '99

Eventually you get more traffic than 1 server can handle. When you have code being replicated to multiple machines, all of which talk to a single SQL back end, you get a certain kind of flexibility... Replicating that code can be tricky - it's a pain to move around Java classes, on the other hand ColdFusion files copy quite nicely. But as code and data get intermingled, this gets trickier. In my old days of running a Frontier-based Mac web server, I ran different parts of my site on different servers. That can work, at least for a while. But if feels ugly, like I'll regret it later. I rather prefer running a farm of identical machines. How are others handling this?

1 0

RPM ?s
by brucek 27 Aug '99

27 Aug '99

To all: I have been trying to use my RPM installation of Zope and I have run into several problems which I believe can be attributed to the fact that I used an RPM installation. I have found the following in the source installation script distributed with the source installation. I have annotated my questions in the text of the RPM piece of the installation script. Any help that anyone could provide would be greatly appreciated. I would like to use the RPM installation and not install from source directly. Currently I am unable to get a process name with ps -A, although the ZopeHTTPServer is running, as I can get to the Zope welcome screen. I also cannot get any authentication for the manage screen, it is the same error that is listed in the FAQ as being the result of a PCGI install of Zope not passing authentication info onto the web server, however I am running the ZopeHTTPServer. I am installing and trying to get to the manage screen as root, so there should be no permission problems. What do I need to do to get the RPM working properly? Here is the text from the product_install.py file that I believe is a solution to the problem. -r -- This is an RPM (or RPM-like) installation. o Get the installation name from the directory name where installe. ( what is the installation name? ) o Use the installation name as the superuser name and use a blank superuser password. This means that the administrator *must* edit access or configure their web server to authenticate this name. ( the access file resides in the /var/local/zope directory, is this correct for an RPM? ) o Create a link for the executable using the name, so that ps listings show the installation name. ( Where do I create this link? ) o Write the resource file accordingly. ( What resource file is this? RPM resource, Zope resource ?? ) Note: I am using the RPM as built by Jeff Rush. I really apprecitate any help the community would be willing to give me. Thank-you Nathen Hinson

1 0

RE: [Zope] DTML Documents vs. Methods--Again? Yikes!
by Michel Pelletier 27 Aug '99

27 Aug '99

> -----Original Message----- > From: Tim Wilson [mailto:wilson@chemsun.chem.umn.edu] > Sent: Friday, August 20, 1999 11:19 AM > To: hoekstra(a)fswrul.fsw.leidenuniv.nl > Cc: Zope(a)zope.org > Subject: RE: [Zope] DTML Documents vs. Methods--Again? Yikes! > > > On Fri, 20 Aug 1999, Rik Hoekstra wrote: > > Hi Rik. Thanks for your help. > > > So, for example, if I create a navigation header to be used > in a number of > pages, a DTML Method would be the ticket, right? It still > seems to me that Yep. > if DTML Documents are more flexible with their ability to > have properties, > why would you need DTML Methods? I understand some of what Because the seperation of content and code is a handy thing. Granted, you can put code in your content (DTML in a Document) and content in your code (stuff in a Method) but the two are there to help you seperate. You can of course abuse this as much as you want. Methods are useful when you want to write a highly dynamic component that uses the content found in it's context. This is why they don't have properties, you don't want the methods own properties sneaking in on you and interfereing with what 'looks' like correct code. > you've written > above, and I suspect that it explains why DTML Methods are so > useful. I'll > study it more. > > What's the typical DTML Document/DTML Method ratio? > That depends on your application. > Also, is it possible to convert a DTML Document to a Method? How about > vice versa? > Not yet. But there's allways cut and paste. ;) -Michel > -Tim > > -- > Timothy Wilson | "The faster you | Check out: > Henry Sibley H.S. | go, the shorter | http://slashdot.org/ > W. St. Paul, MN, USA | you are." | http://linux.com/ > wilson(a)chem.umn.edu | -Einstein | http://www.mn-linux.org/ > > > _______________________________________________ > 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 ) >

2 1

Processing form data.
by Fredrick Rybarczyk - LUB NetLab 27 Aug '99

27 Aug '99

Hi there! I'm rewriting a dissertation abstract database + web interface from scratch and I'd like to use Zope with postgres for my little app. I've tried to follow the list during the last three weeks and I've briefed through most of the documentation. Even so, I'd like to ask a couple of newbie questions to get up in speed. 1: I'd like to process forms with external methods since I've got rather complicated input. How do I access the querystring from an external method? 2: Since 'Zope Zen' yet has to show up around my office, would anyone like to suggest an alternative method to using external methods? 3: I will also need to url encode my data. Can Zope handle that / is there a module for it somewhere? 4: Im scetching on a simple python module that implements some of the stuff found in CGI.pm Would that be useful to other Zopers or am I doing somthing already done better by others? \ Best Regards, Fredrick -- ========================================== Fredrick Rybarczyk Research Engineer NetLab, Lund University

2 1

permissions for "propertyItems()"
by Heiko Stoermer 27 Aug '99

27 Aug '99

anyone know how I can find out which permissions I have go grant a user to let him view a document that implements a call to "propertyItems()"? -- Heiko Stoermer MIG Augsburg

1 0

Random Advert Generation
by wombat_harness＠hotmail.com 27 Aug '99

27 Aug '99

Hey everyone, I have just installed Zope 2 and imported my almost complete site into it. However all my random content generators have gone 'arghhhhhhhhh'. I followed the commands on www.zope.org for producing random content but this doesn't seem to work in zope 2. Here is the code i am using.  i have got a property called randomMontage set up of type 'token' with the values: montage1.jpg montage2.jpg montage3.jpg montage4.jpg montage5.jpg now on the old version, a random image would be pulled out and displayed but i am getting a '__CALL__' error now, Does anyone have any ideas, Cheers, Wom.

1 0

Re: [Zope] Idea: ZTest: Integrated Use-case based web site testing.
by David Kankiewicz 27 Aug '99

27 Aug '99

Having stayed current with all the email in most of the Zope mailing groups (about two months) it seems to be one tool that everyone sees as future/present solution, depending on ones needs. Most comment that it needs this or that, a Scheduler as come up before. Someone said make a web page and call the URL from an external program.. Its would be nice to have a simple interface to something like this and nicer have management without the need to access the underlying system. I, much like this person, have an over active imagination for zope products and would like to at least try my (very new python) hand at creating a Scheduler. (I know anyone could do it a lot faster then me if they had the time). As this case points out it could be used to do almost anything, from checking to see if everything is working (if someone implemented it) to ZCataloging everything not ZCatalogAware on a night/weekly basis (something any site might want to do). And every product Zope gets makes it that much easier to work within odd situations. So I'm going to get together the requirements, functionality, and see if I can implement and learn a little more about python in the process, and Zope for that matter. If someone wants to suggest use cases for a Scheduler or ZTest (I'll probably never get to programming it), I'll maintain the ideas and maybe someone will make use of them in the future. At 11:37 AM 8/27/99 +1000, Jay, Dylan wrote: >To much caffeine and some morning reading >(http://www.rational.com/products/rup/prodinfo/whitepapers/dynamic.jtmpl?doc >_key=101057) has given me a bit of a brainwave. >When building complex dynamic site testing is very important. I've created >use-cases and test plans for my web-site. I've investigated automatic site >testing tools a little bit but have found them a) expensive b) not very good >when it comes to testing dynamic content and getting past authentication. >What if a Zope site could test it self regularly and just mail the webmaster >when something is wrong? Sense authentication is internal and if ZTest was setup to take this into account it would be easy to test most objects/methods. > >So what I envisage is test-case objects that have a specification of a >certain scenario and expected results. It would be a series of URLs with >parameters to be given and a specification of what the requested page should >look like. Since this is internal to Zope then some information about what >is interesting and what is not can probably be leveraged. Such ZTestCase >objects can be created either by instrumenting the site and then the you >step through the pages or can be edited manually. Specified code could be >executed before and/or after each test case to set and reset test >conditions. ZTestRun objects can then be created which specify a whole range >of test-cases to run. I see this as manageable as long as the object being tested was not interacting with databases (unless that part of the system was redirected to the ZTest or rolled back to pretest condition or restricted to read only, that is above what I could do right now). > >Another idea I had involves the creation of a scheduler inside Zope so that >specified Zope code could be executed in the future or periodically. >Caching, indexing, retrieving external data, backup etc and of corse >scheduling running of test cases. > As I said up top, I'm going to look into this shortly.. >Unfortunately for me I seem to have way more ideas than I have time so I >don't know when I would get time to try implementing it so I thought I'd >bounce it out into the community to see what others thought. The Zope community really should have a more formal method of cataloging Ideas that are suggested and rate the interest and try to set some priorities, informal of course. Like in the ZCommerce mailing list, ideas flow fast! :) hope that continues to progress.. Thanks for the interest in and ideas for Zope, David Kankiewicz > >______________________________________________ >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 ) >

4 3