September 2000 - Zope-Dev

User Info Folder Product Released
by Didier Frick 11 Sep '00

11 Sep '00

Hi all, I just released a Zope product, but since I'm a Zope newbie I'm still wondering whether there is something fundamentally wrong with my idea or not. Could someone check that thing and tell me whether I'm completely off base ? I'm pretty sure there would be a way to solve the same problem using ZPatterns, but I'm still at the very beginning of the learning curve, so I'd rather do with something without too many dependencies. Anyway, here's the product's blurb: User Info Folders maintain a collection of ZClasses synchronized with a user folder. You can specify the name of the product and the name of the ZClass in this product. The User Info Folder will then automatically maintain one instance of the specified ZClass for each user in the "nearest" User Folder in the hierarchy (the acquired 'acl_users' object). This can be very useful if you want to create ZClasses representing user-specific information: an instance of this ZClass will be automatically maintained by the User Info Folder for each user, allowing it to be referenced by URLs. The URL for the product is http://www.zope.org/Members/did/UserInfoFolder Thanks for your feedback, Didier -- Didier Frick Freelance Software Developer & Consultant http://www.dfr.ch/

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Z SQL Method Patch
by Casey Duncan 11 Sep '00

11 Sep '00

In debugging some Z SQL methods I found it quite hard to diagnose certain errors returned by the database backend because Zope doesn't return the SQL sent to the server, instead it returns "Could not render the query template!" which is not really true for this case. In looking at the source code of DA.py (lib/python/Shared/DC/ZRDB), and I think I found a simple solution: in manage_test insert the following indented after line 343 (except:) try: src=self(REQUEST, src__=1) except: pass This re-renders the query template if possible without sending it to the backend and returns the SQL in src. The result is your backend error message followed by the SQL generated. This should really save time debugging any dynamic Z SQL methods. It was moderately tested on Zope 2.2.1/PostgreSQL 7 via PyGreSQLDA. It should not be database dependant though. Enjoy. -Casey Duncan

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ZPatterns: Error reimporting .zexp containing Folder w/ Customizer Support Support
by Steve Alexander 11 Sep '00

11 Sep '00

I have a customizer folder with various data-plugins and customizers. I just exported it from one zope installation, for importing into one on a different server. The installations are more or less identical -- same zope version, same products. When I try to reimport it, I get the following error: Error Type: TypeError Error Value: No data plug-ins available to link to in /emb Traceback (innermost last): File lib/python/ZPublisher/Publish.py, line 222, in publish_module File lib/python/ZPublisher/Publish.py, line 187, in publish File python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File lib/python/ZPublisher/Publish.py, line 171, in publish File lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_importObject) File lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_importObject) File lib/python/OFS/ObjectManager.py, line 535, in manage_importObject (Object: ApplicationDefaultPermissions) File lib/python/OFS/ObjectManager.py, line 290, in _setObject (Object: ApplicationDefaultPermissions) File lib/python/Products/ZPatterns/PlugIns.py, line 211, in manage_afterAdd (Object: PlugInBase) File lib/python/OFS/ObjectManager.py, line 298, in manage_afterAdd (Object: PlugInBase) File lib/python/Products/ZPatterns/PlugIns.py, line 211, in manage_afterAdd (Object: Transactional) File lib/python/OFS/ObjectManager.py, line 298, in manage_afterAdd (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 64, in manage_afterAdd (Object: PlugInBase) File lib/python/Products/ZPatterns/PlugIns.py, line 120, in _addPlugIn (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 168, in manage_refreshPlugIns (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 332, in manage_refreshPlugIns File lib/python/Products/ZPatterns/Providers.py, line 101, in _PlugInsChanged File lib/python/Products/ZPatterns/Providers.py, line 178, in namesForRegistration (Object: PlugInBase) TypeError: (see above) I'll start to look into this. Any advice would be most welcome. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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Size of Data.fs - and crypto.
by Erik Enge 10 Sep '00

10 Sep '00

Hi. Does the performance of Zope degrade as the Data.fs get larger? Both on startup time (which I'm pretty sure will degrade) and on respons time, serving a object f ex? Another thing. Have anyone tried to encrypt all data inside the Data.fs file? I mean, encrypted the data so that not even root can access it, only if you have the right passphrase (or whatever) in the management interface are you allowed access to the data. Anyone tried anything like that? Thanks.

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FW: ZClass, acquisition, dtml confusion
by Jon Franz 10 Sep '00

10 Sep '00

Since no one on general could answer this, I'm sending it to Dev now: sorry for cross posting. -----Original Message----- From: Jon Franz Sent: Friday, September 08, 2000 1:24 PM To: 'zope(a)zope.org' Subject: ZClass, acquisition, dtml confusion Hello, Previously I made a DTML method that when used within a DTML Document would modify properties on that document. Having this floating around in root made it visible to the whole site, but seemed 'unclean'. So, I attempted to make the DTML method into a ZClass, and making the index_html method in the ZClass contain the exact same DTML as the method... But it doesn't work. So, I tried again - this time with as simple a method as possible, a very basic counter. The DTML method I made in root increments and displays the 'z_count' property on the page that calls it, and creates the property if it doesn't exist, so using it is as simple as: <dtml-var mycount> However, I place the DTML into a new class, and then make a new instance of the class, and it wont work as above. I now have to do this: <dtml-with MyZCCount> <dtml-var MyZCCount> </dtml-with> And, instead of modifying the property of the calling document, it modifies the parent folder's properties. Below is the DTML, can someone please explain what I need to do to get this to work on the calling DTML document instead? If I can't get this simple counter to work I'm going to go mad, since changing properties is something I need to be able to do from many of my planned ZClasses... Thanks in advance! <dtml-if "hasProperty('z_count')"> <dtml-var "'%06d' % (z_count + 1)"> <dtml-call "REQUEST.set('z_count', z_count + 1)"> <dtml-call "manage_changeProperties(REQUEST)"> <dtml-else> <dtml-call "manage_addProperty('z_count', 1, 'int' )"> 000001 <dtml-if>

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RE: [Zope-dev] Size of Data.fs - and crypto.
by Chris McDonough 10 Sep '00

10 Sep '00

> Does the performance of Zope degrade as the Data.fs get larger? Both > on startup time (which I'm pretty sure will degrade) and on respons > time, serving a object f ex? No... Data.fs is only appended to, so I don't think there is any appreciable seeking latency as it grows. You can probably verify this by running speed.py (distributed in lib/python/ZODB/test/speed.py) against a large FileStorage and then against a small one. > > Another thing. Have anyone tried to encrypt all data inside the > Data.fs file? I mean, encrypted the data so that not even root can > access it, only if you have the right passphrase (or whatever) in the > management interface are you allowed access to the data. You'd probably need to rewrite the pickling and unpickling routines used in lib/python/ZODB/Connection.py to dump and load "encrypted" pickles.

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PATH_TRANSLATED delimted with backslash ?
by Steve Alexander 10 Sep '00

10 Sep '00

I just tried out on Windows 98 a Zope application that was developed on Linux. Everything worked fine, except that REQUEST.PATH_TRANSLATED changed to be delimited by backslashes on Windows 98, whereas it is delimited by slashes on Linux. This caught me out, as I'd been using it raw in an external method: obj = self.restrictedTraverse(REQUEST.PATH_TRANSLATED) This stopped working when I tried the software on Windows. Bug or feature? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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Calendar Tag 0.9.21 released
by al028823＠alumail.uji.es 09 Sep '00

09 Sep '00

Hi all, The version 0.9.21 of the calendar tag has been released, it can be downloaded from "http://www.zope.org/Members/jdavid/Calendar". This is a beta version, pre-1.0. If you're aware of any bug or want a *small* change to be done in 1.0 tell me now (hope to release 1.0 and start 1.1.x soon). regards, david

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SkinScript, and family
by Bill Anderson 09 Sep '00

09 Sep '00

OK, I have some potentially complicated calculations to build on a Ticket Tracking system I've built here. I can do it in python mehtods, but am wondering if skinscript will get me what i want as well. If anyone has done dome stuff in skinscript they can share I would be ecstatic. I don't necessarily need a tutorial (but would be happy to review and rate one :), as I can learn fairly well from examples that have an explanation of what the skinscript accomplishes. TIA, Bill -- Bill Anderson (ARC) Unix/Linux System Administrator HPSO Engineering Productivity Team Thursday, September 07, 2000 Random Quote: Never eat anything bigger than your head.

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ZPatterns Dataskin base class?
by James Johnson 09 Sep '00

09 Sep '00

My ZClass only had Dataskin as a base class. I'm not sure what other class should be added to the Dataskin. I"m trying to work off the simple example that PJE mentioned on the IRC chat. Jimbo Get your Free E-mail at http://tacoma.zzn.com ____________________________________________________________ Get your own Web-Based E-mail Service at http://www.zzn.com

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