December 2002 - Zope

No Module named ZamlBase (editing ZSQL)
by Brad Clements 13 Dec '02

13 Dec '02

I have a Zope site .. its' been upgraded over the years from 2.2 (perhaps older) and now is at 2.6.0 When I try to view the "advanced" tab of ZSQL objects, I get the following exception. I have no idea what Zamlbase is .. Perhaps a product I had tried ages ago. In any case, even if I create new ZSQL objects I still get the same exception trying to view the advanced tab. Any ideas how I can fix this? I recall a hack at some point .. something in Zclass, I can't remember. 2002-12-12T15:18:37 ERROR(200) ZODB Couldn't load state for '\x00\x00\x00\x00\x00\x00\x1e\x19' Traceback (innermost last): Module ZODB.Connection, line 533, in setstate ImportError: No module named ZamlBase ------ 2002-12-12T15:18:37 ERROR(200) SiteError http://strader.murkworks.com:7180/Strader/P/xSQLPackage/manage_advancedForm Traceback (innermost last): Module ZPublisher.Publish, line 98, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module Shared.DC.Scripts.Bindings, line 252, in __call__ Module Shared.DC.Scripts.Bindings, line 283, in _bindAndExec Module App.special_dtml, line 174, in _exec Module Shared.DC.ZRDB.DA, line 476, in manage_product_zclass_info Module ZODB.Connection, line 533, in setstate ImportError: No module named ZamlBase Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax AOL-IM: BKClements

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why will python be using over 90% of CPU time ?
by Hamzat Kamal 13 Dec '02

13 Dec '02

Hi, I am running zope server 2.5.1, python 2.1.3. on RedHat Linux (latest ver). Ever before now I discovered that when the traffic to my site is high the python will be using 99.9% of the CPU usage constantly, and only using 300Mb of 772Mb of my bandwidth. This make the site to be very slow and almost inaccessible to the visitors, infact it always bring down the zope server. But now I also found out that the python uses as much as 45-55% of the CPU usage when the traffic is redirected out of the zerver and been accessed by me alone. I need help from those that have better understanding of how the zope server works on what could have been the cause(s) and what can I do to sovle this problem. Thanks. ===== Hamzat kamaldeen Ishola Dnet Systems Limited. 223 Ikorodu Road, Lagos. Nigeria. 234 1 7749381, 234 08033011305 --- If Mistake is an opportunity to see better,�then do not fear it, but ready to admit it. NOTE: Sentimental decisions are not mistakes but failures !!!� __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

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Problem with AUTHENTICATED_USER.has_role('X')"
by complaw＠hal-pc.org 13 Dec '02

13 Dec '02

I'm stumped. I have a block of dtml code in my standard_html_header file that is supposed to tailor the menu line depending upon the user's role (once authenticated). For example, the standard_html_header file contains something like: <dtml-if "AUTHENTICATED_USER.has_role('Manager')"> ... make a (more extensive) menu line <dtml-else> ... make a menu line for non-authenticated users </dtml-if> I have a login menu item for the non-authenticated users, giving them an opportunity to authenticate. The authentication scheme calls a DTML Method (named "logger") that has security settings such that the challenge/response routine is initiated. Once the user is able to run logger, it takes them back to the index_html file (with the standard_html_header file mentioned above). When comming from the logger object, the menu is constructed correctly (according to the user's role). However, when coming back to index_html from somewhere else (say another folder), it goes back to the non-authenticated menu as if I never logged in (i.e., the code of the AUTHENTICATED_USER has somehow changed or is being ignored). Note, when I click on the login menu button (calling the logger object, I immediately get the correct menu (without the challenge/response). Is there something to remedy this problem? TIA, Ron

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global variables in externa Methods
by Elena Schulz 13 Dec '02

13 Dec '02

Hi, I want to set globale variables in external methods. With the following constuct I get errors if myFunctionA is set as function in the add external method form. Does anybody know how to set up global vars in external methods. -- many thanks for your replies, Elena #myExternalModul.py def myFunctionA(var1): global var1 myFunctionB() return def myFunctionB(): var2 = var1 return var2

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Published methods and docstrings
by Andrew Durdin 13 Dec '02

13 Dec '02

Hi all, I'm a newcomer to Zope, and while mostly it seems attractive, there's one thing that to me seems downright wrong: the use of docstrings to differentiate between published and private (wrt the web) objects (methods in particular). Why I think this is bad: 1. The purpose of the docstring in Python is to give a human-readable textual description of the objects's function or purpose. 2. Zope uses this docstring for deciding whether to make the object published (visible from the web). In essence, this seems to be taking a structure intended for documentation, and using it for security purposes (where visibility is a facet of security). 3. As far as I have been able to see, there is no way to disable the functionality described in (2); similarly, there is no way to use a override the behaviour, so that one can give a non-published object a docstring. I hope I'm wrong about part (3). I hope that something has been/is being done to rectify this design flaw. Andrew

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Calling in Context
by Brian R Brinegar 13 Dec '02

13 Dec '02

Howdy, Overview: I'm working on a helper product for Zope Presentation Templates. The goal of this product is to allow people to drop static content into a site developed with Zope Presentation Templates using WebDAV clients. (This is similar to the Kube Product but it's not folderish and supports WebDAV.) At first I suggested creating some ZPT with an Id like "view". Have users drop in static content as File objects. Then link to the files like "file_id/view". The "view" ZPT would reference the document_src method of the file object to pull the static content into the page. I like this approach, and I think this is how Presentation Templates are meant to be used. Problem: Our users will not change links created by WYSIWYG tools to include the "/view" so we need a product that removes the need for this. I am calling the product HTMLBlock. Version one of the product is a simple data holder with a document_src method which returns the content. It does not override index_html, instead acquiring the index_html from the context. I create an index_html page template with all of my presentation and some code like: <div tal:replace="here/document_src">Content Goes Here</div> When an HTMLBlock is viewed it shows up with all of the dynamic presentation of the index_html ZPT with the HTMLBlocks static content dropped in. Great! Almost there! :-) The problem is that people cannot create a default HTMLBlock with the Id index_html. It ends up trying to render itself much like a folder with the Id index_html. No Good. :-( So I temporarily fixed this by changing the template to redirect to an object with the Id "index" if document_src doesn't exist. When someone views a folder the index_html template is accessed, document_src is not defined so it redirects to "index" which is an HTMLBlock which renders correctly. I don't like this. :*( Still No Good. What I want is for the HTMLBlock product to have a property which specifies the Id of the template to use. Implement an index_html or __call__ method to locate the template and call it in the context of itself. I would like this to work generically so that the template could be DTML, Python, a ZPT, or anything else. Casey Duncan has some uber useful code on ZopeLabs.com to call an object generically using the ZPublisher. I borrowed it and came up with the code below, but it doesn't work. It calls the template, but the template cannot access methods of this object. Suggestions? Is there a better approach? (Note: template_id is the Id of the template to render) def __call__(self, client=None, REQUEST={}, RESONSE=None, **kw): """ Call the selected template in the context of myself. """A securityManager = getSecurityManager() securityManager.addContext(self) # Check for the template if not hasattr(self.aq_parent, self.template_id): return str(self) obj = getattr(self.aq_parent, self.template_id) if not securityManager.checkPermission('View', obj): return default return mapply( object=obj, positional=REQUEST.args, keyword=REQUEST, debug=call_object, maybe=1, missing_name=missing_name, handle_class=dont_publish_class, context=self, bind=1) The code below works, but requires a PageTemplate with the Id "index" to work def __call__(self, client=None, REQUEST={}, RESONSE=None, **kw): return self.index() Thanks, -Brian

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Capturing SQL Method exceptions in Python scripts
by Satheesh Babu 13 Dec '02

13 Dec '02

Hello, I've a python script in which I would like to call some SQL methods. Some SQL methods in question are DDL statements (alter table etc.). What I'm trying to do is to make an installer script for some patches. However, it is possible that the DDL statements might fail. How can I capture the exception type and process it? the zope-error pages come up like "sql.error: blah blah blah" try: ret = mysql() except sql.error, details print ... Normal python! But what should I REALLY use for sql.error ? Thanks in advance S Babu http://vsbabu.org/

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LocalFS and zCatalog
by Meilicke, Scott 13 Dec '02

13 Dec '02

Hello, I am trying to index files in a file system, not in zope, using LocalFS and zcatalog. I have not been successful. Is anyone doing this currently? Specifically, I can't figure out what index localfs.py would use with a zcatalog. Also, there is a warning in the localfs help about poor performance when using zcatalog support in a localfs - is this because it catalogs all content with each query, and does not actually store the results in zcatalog? Thanks - Scott The information contained in this email message may be privileged and is confidential information intended only for the use of the recipient or any employee or agent responsible for delivering it to the intended recipient. Any unauthorized use, distribution or copying of this information is strictly prohibited and may be unlawful. If you have received this communication in error, please notify the sender immediately and destroy the original message and all attachments from your electronic files.

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Python use more and more memory
by Terry 13 Dec '02

13 Dec '02

Hi, The memory used by python getting more and more. Is that a normal behavoir. In beginning I start Zope. the python use about 26M memory. After several hours get the result by "top" Sort by memory usage PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND 4931 www-data 13 0 94324 92M 2504 S 3.5 10.4 7:43 python 5022 www-data 9 0 94324 92M 2504 S 0.0 10.4 0:00 python 5023 www-data 9 0 94324 92M 2504 S 0.0 10.4 15:55 python 5024 www-data 14 0 94324 92M 2504 S 14.5 10.4 16:55 python 5025 www-data 10 0 94324 92M 2504 S 0.3 10.4 15:35 python 5026 www-data 9 0 94324 92M 2504 S 0.0 10.4 16:32 python Have any idea why? TerryH

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Changing the properties contained in the default PropertySheets
by Stacy Roberts Ladnier 13 Dec '02

13 Dec '02

I have created a custom view for the properties of my python product object. I allow the user to change the properties in the custom form. After the user if finished editing the properties, he clicks on the Save Changes button. This calls on a dtml method that calls the manage_changeProperties(REQUEST) function. However, the changes are never made to the actual properties of the object. I have tried several different ways and still fail. I would greatly appreciate any guidance provided. Stacy

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