September 2001 - Zope-Dev

Adding a permission to an ObjectManager derived ZCLass
by Michael R. Bernstein 27 Sep '01

27 Sep '01

Hi all, I posted this 24 hours ago on the main zope list, but didn't receive a response, so I'm reposting here. I've got an ObjectManager and Folder derived ZClass that contains instances of a second rather simple ZClass. It works fine, the Manager role can access the management interface of the container, add edit and delete instances of the contained ZClass, and Anonymous can view index_html. Now, I am trying to add a permission to the container ZClass that will let a user with a specialized role that has the permission view the management interface (the 'Contents' tab) of the container and add, edit, or delete the simple ZClass instances in the container. The container doesn't have any property sheets, but the simple ZClass does. Does anyone have a simple walkthrough of what I need to do? The Zope Book only discusses adding a permission to control access to a Property Sheet. Thanks in advance, Michael Bernstein.

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RE: [Zope-dev] Web Services for Zope
by sean.upton＠uniontrib.com 27 Sep '01

27 Sep '01

>>> {snip} >>> >>> trying-to-auto-generate-a-wsdl-from-my-product'ly yours Hmm... in the interim, what about using ZPT (+ParsedXML, of course) and a few python scripts to do this? Sean _______________________________________________ Zope-Dev maillist - Zope-Dev(a)zope.org http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )

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Distributing Zope & one of our products
by Simon Coles 26 Sep '01

26 Sep '01

Hi, You may know that as well as doing Cool Things With Zope, we also do stuff with Electronic Lab Notebooks (ELNs) - not using Zope unfortunately, but that's another story. Anyway, we have come up with an Open Source ELN (OS-ELN), which is based on Zope and the CMF. Readers of this forum will not be surprised to know that it didn't take much to turn Zope + CMF into quite a nice little ELN. For the curious, you can download what we have at http://www.opensourceeln.org/ What we're trying to do is make this thing approachable for people who don't know Zope, and indeed are somewhat unfamiliar with installing Open Source stuff on their machines. Our primary target for a more approachable install is Windows users, as we feel Linux users are probably going to be OK with a more manual install. The ideal would be to have single file they double click to install, answer a couple of simple questions in the install process, and then point their browser at their running ELN. Kind of like the existing Zope for Windows binary install... But of course at the moment we have to get them to: - install Zope - get, expand, and install the CMF (which is distributed as a .tgz, rather confounding Windows users) - get our product and expand/install it - then log in as the inituser, create a normal user, log out, log back in, create an ELN, then log out, then access the ELN, and join in the normal CMF fashion What I'd like to do is customise the existing Zope installer to include the CMF and our OS-ELN, and to have an already-setup Data.fs. That would really reduce the amount of work someone had to do to download and start playing with this, and of course once they've had a play they may well decide to invest more time in learning Zope and setting up a proper server for production use. Does anyone have any thoughts as to the desirability of this, and the best way of doing it? (BTW, I've always felt that "products" like Squishdot would really benefit from something like this as well. Maybe when Chris sees how easy this is to do for the OS-ELN.... ;-) Thanks for any help, Simon --------- My opinions are my own, NIP's opinions are theirs ---------- Simon J. Coles Email: simon(a)nipltd.com New Information Paradigms Work Phone: +44 1344 753703 http://www.nipltd.com/ Work Fax: +44 1344 753742 =============== Life is too precious to take seriously ===============

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Acquisition, __getattr__ and making a Proxy/Symlink class
by Lupus Yonderboy 26 Sep '01

26 Sep '01

Hi folks, I'm having some troubles trying to develop a particular zope object and would really appreciate a bit of help. I'll explain what I'm trying to do: What we have is a tree of nodes rooted in a folder (excuse my ascii art) like so: + DocumentRoot (folder) + a + b + c + d + e + e + f + g + X (proxy, pointing to 'e') Here [a-g] are our node objects, and X is a proxy-object. The proxy-object is intended to behave a bit like a sybolic link with a few extra features. I have looked at Shane Hathaway's Symlink product, which does the linking job just fine. It allows us to create a proxy that behaves just like the target, but we also need the proxy-object to have it's own attributes and methods. In the above hierachy, the desired way of finding an attribute of the proxy 'X' goes something like: - look in the proxy object ('X') - if not there look in the proxy target ('e') - (maybe) if still not found acquire from aq_parent ('g') - otherwise raise AttributeError I guess we are wanting X to behave as though it were a child of the object it links to, so X always behaves as though it were X.__of__(e) (and possibly also a child of g, ((X o g) o e) or ((X o e) o g) if not too complicated). I have tried hooking __getattr__ and have a hard time avoiding recursion; I have taken a look at the ever-productive Shane Hathaway's TransparentFolder product as well but I think I am let down by my lack of understanding of the particulars of acquisition. Can anyone shed some light on how i might do this? All objects under the DocumentRoot will be derived from one of our base classes, so if we need to override __getattr__ as per TransparentFolders it can be done easily. Cheers __________________________________________________ Do You Yahoo!? Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger. http://im.yahoo.com

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zLog and stderr
by Toby Dickenson 26 Sep '01

26 Sep '01

I have some old python modules which are generating messages from the new python 2.1 warning framework. I can easily fix these modules, however it has exposed a problem in Zope...... The warning framework tries to write to sys.stderr, and my Zope is dying from an exception because stderr has been closed. I think it makes sense that Zope should replace sys.stderr with an object that sends messages to zLog, however zLog itself sometimes wites to sys.stderr. Any thoughts on the right way to fix this? Toby Dickenson tdickenson(a)geminidataloggers.com

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Create directory in LocalFS
by Jeff Nielsen / UgoFast 26 Sep '01

26 Sep '01

Can anyone tell me how to create a subdirectory programmatically under a LocalFS folder? I have a LocalFS folder called images. When I add a new promoter to my site, I'd like to automatically add a directory that would hold that promoter's images. If the promoter's ID number is 187, I want to create a subdirectory '187' under images/Companies/100. Jeff Nielsen / UgoFast http://www.UgoFast.com Jeff(a)UgoFast.com

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StructuredText problem w/ literals & underlining
by sean.bowman＠acm.org 26 Sep '01

26 Sep '01

hello, I'm having a problem with StructuredText on Zope-2_4-branch under python 2.1.1. Literals with underscores in them get rendered as underlined rather than literals; for example, '__class_init__' gets rendered as StructuredTextParagraph(["'_", StructuredTextUnderline('class'), "init__'"], [ ]) rather than StructuredTextParagraph(StructuredTextLiteral('__class_init__'), [ ]) (which is how ClassicDocumentClass.DocumentClass renders it). The following patch works for me, but perhaps I'm just confused about the proper way of doing things with the StructuredTextNG package? regards, Sean --- DocumentClass.py Wed Sep 26 11:49:43 2001 +++ DocumentClassNew.py Wed Sep 26 11:48:55 2001 @@ -371,8 +371,8 @@ 'doc_href', 'doc_strong', 'doc_emphasize', - 'doc_underline', 'doc_literal', + 'doc_underline', 'doc_sgml', 'doc_xref', ]

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random regex
by seb bacon 26 Sep '01

26 Sep '01

I'm finding that the regex which deals with links in structured text is broken (Zope 2.4.1, Python 2.1). If you try a link with a query string: "link":http://www.foo.com?ding=dong&bit=bat the part of the regex which is matching the url only matches up to the first '=' (or '&'). If I run the expression against a string in the python interpreter, the correct match is returned. The problem only occurs in lib/python/StructuredText/DocumentClass.py. After a lot of playing around with the expression, I found I could only get it to match correctly *by running it against the same string three times in a row*. Can anyone else reproduce this problem? Has anyone any suggestions as to what might be causing it? Perhaps it's some kind of boundary condition in the re module? I don't really have the time to pursue it much further, so it looks like I'll have to settle with a Tracker entry and a nasty hack. seb

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Multithread transaction problems in ZODB
by Cyril Elkaim 26 Sep '01

26 Sep '01

Hi, We are testing ZODB directly from Python and have a multitread ConflictError problem. In short :-) if we open a connection in a first thread, then a second connection in a second thread and then commit the first one and then the second (the transactions are so interlaced)... Not only we have the ConflicError, even if obviously we do not modify or create the same objects. But in fact the last transaction doesn't even have its own objects saved. We are using ZODB from Zope 2.4. We have a similar problem using Berkeley Storage too (beta4). If the two threads are serialized eveything works fine (but that's no more multithreading no? ;-) So is it possible to access ZODB from a multithreaded application? Thanks in advance Cyril Elkaim

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ImportError (No module names utils)
by Morten W. Petersen 26 Sep '01

26 Sep '01

Hi, after using a module named utils in a Zope product the root management screen is no longer available (the module is now renamed). The traceback looks like this: Traceback (innermost last): File /home/morten/tmp/Zope-2.4.1-src/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /home/morten/tmp/Zope-2.4.1-src/lib/python/ZPublisher/Publish.py, line 187, in publish File /home/morten/tmp/Zope-2.4.1-src/lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File /home/morten/tmp/Zope-2.4.1-src/lib/python/ZPublisher/Publish.py, line 171, in publish File /home/morten/tmp/Zope-2.4.1-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_main) File /home/morten/tmp/Zope-2.4.1-src/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_main) File /home/morten/tmp/Zope-2.4.1-src/lib/python/Shared/DC/Scripts/Bindings.py, line 324, in __call__ (Object: manage_main) File /home/morten/tmp/Zope-2.4.1-src/lib/python/Shared/DC/Scripts/Bindings.py, line 354, in _bindAndExec (Object: manage_main) File /home/morten/tmp/Zope-2.4.1-src/lib/python/App/special_dtml.py, line 244, in _exec (Object: manage_main) File /home/morten/tmp/Zope-2.4.1-src/lib/python/DocumentTemplate/DT_In.py, line 711, in renderwob (Object: objectItems) File /home/morten/tmp/Zope-2.4.1-src/lib/python/DocumentTemplate/DT_In.py, line 839, in sort_sequence (Object: objectItems) File /home/morten/tmp/Zope-2.4.1-src/lib/python/ZODB/Connection.py, line 544, in setstate ImportError: (see above) Any ideas? Thanks, Morten

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