March 2004 - Zope - Zope lists

finding orphaned Product objects
by Fred Yankowski 11 Mar '04

11 Mar '04

I want to clean up a Zope instance to remove some installed products that are no longer needed or even available in the filesystem any more. I've got an idea about how to do that and I'm looking for feedback about any problems or shortcomings. My first thought was to look at each Product object under Control_Panel.Products and check to see if its home directory exists. Those objects do have a 'home' attribute but it seems to be unreliable; the values often refer to directories that no longer exist (but did exist at the time the product was installed). Such incorrect home values sometimes occur for products that do exist under $INSTANCE_HOME/Products and that I'm still using. I wasn't able to find any other per-Product attribute with such home-directory information. No joy there. What I've got now (see attached script) considers each of the Products and tries to find an imported Product module by the same name. Any Products without such a module are either orphans (my term) or are a product created strictly through the web using ZClasses and the like. I think. I'm planning to delete the orphaned products from the Control_Panel/Products folder in the ZMI. Does this plan make sense? -- Fred Yankowski fred(a)ontosys.com tel: +1.630.879.1312 OntoSys, Inc PGP keyID: 7B449345 fax: +1.630.879.1370 www.ontosys.com 38W242 Deerpath Rd, Batavia, IL 60510-9461, USA

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[ANN] mxmDynamicPage 2.0, Plone content type for dynamic lists released
by Max M 11 Mar '04

11 Mar '04

The mxm Dynamic Page product for Plone makes it easy for end-users to make dynamic pages that aggregates lists of content from a part of a Plone site. In short, it makes it easy to add dynamic lists to a document. It is especially usefull as an "index_html" in a member folder, where the member then has the option to make dynamic lists of his content. But it can also be used to make custom versions of the common "news" page, or pages similar to that. It does nothing that Topics and ZPT cannot do, but that approach is far to difficult for end users. I also found the current products that creates dynamic pages too complex and difficult for end users. I have tried to find the sweet spot between power and ease of use. Previous versions has been used in production for allmost a year, with good end-user satisfaction. More info at http://www.mxm.dk/products/public/mxmDynamicPage/ -- hilsen/regards Max M, Denmark http://www.mxm.dk/ IT's Mad Science

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Howto test if macro evaluates to nothing
by Florian Schulze 11 Mar '04

11 Mar '04

Hi! I would like to know wether there is a way to test if a macro evaluates to nothing. I tried the following: <div tal:condition="here/my_macros/macros/macro_name" metal:use-macro="here/my_macros/macros/macro_name"> </div> But the macro returns a tree of lists and tuples. Regards, Florian Schulze

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Multiple Zope instances
by John Poltorak 11 Mar '04

11 Mar '04

Are there any good references to setting up and using multiple Zope instances? -- John

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Zope products and DTML
by Stephen Rudd 11 Mar '04

11 Mar '04

It's me again - and still having problems. I have a Zope product. It generates a load of useful information, but I wish to insert some DTML tags into the data that is output. I have no problem inserting these tags, but they will not render. Please could someone please explain how to encourage DTML to be parsed from the returned text. Thanks in hope and anticipation Stephen ----------------------------------------- Dr Stephen Rudd - genome astronomer Bioinformatics group Turku Centre for Biotechnology Tel. +358 2 333 8611 Fax. +358 2 333 8000 ------------------------------------------

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.HTC (dhtml "behavior") files in Zope - problem and solution
by Paul Winkler 11 Mar '04

11 Mar '04

Here's one for the archives... Today I tried to add the png alpha-blending hack for IE to my zope site. This hack involves a DHTML "behavior" file, also known as HTC ("HTML Component") file, as described here: http://webfx.eae.net/dhtml/pngbehavior/pngbehavior.html I don't know squat about DHTML, so I just wasted most of today banging my head against the example on that site... ... wondering why it worked from the windows filesystem, and had no effect at all when uploaded to zope via FTP. I should have thought of this hours ago... the issue was content-type. You must arrange for the .htc file to be served from zope with a content type of text/x-component. text/plain works too. text/html does NOT work. -- Paul Winkler http://www.slinkp.com Look! Up in the sky! It's JUICY FOUL SORCERER! (random hero from isometric.spaceninja.com)

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ZClass syntax question...
by Russell Fine 11 Mar '04

11 Mar '04

I'm new to developing Zope products and I'm trying to understand how I can add funcitonality to a ZClass. Specifically, What is the syntax to : 1. During intialization add an additional member to the ZClass (not a property, a member). For example, I'd like: instance.mymember=1 2. If the ZClass is an Object Manager, how would I create instance objects during construction (I'd like there to be default objects) ? Thanks Russell Fine

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context bound to PythonScript even when not specified ??
by Jean-Francois.Doyon＠CCRS.NRCan.gc.ca 11 Mar '04

11 Mar '04

Hello, I have an FS based PythonScript that looks like this: ## $Id: learningresourceslist_edit.py 152 2004-03-09 21:32:42Z jdoyon $ ## Script (Python) "learningresourceslist_edit" ##parameters=docpaths=[] ##title=Edit a Learning Resources List context.edit( docpaths=docpaths ) qst='portal_status_message=Learning+Resources+List+changed.' target_action = context.getTypeInfo().getActionById( 'edit' ) context.REQUEST.RESPONSE.redirect( '%s/%s?%s' % ( context.absolute_url() , target_action , qst ) ) Note the absence of ##bind ... So how come "context" still works if it isn't bound ? I was thinking at some point I'd clean up all unnecessary bindings from all my FS based PyScripts, but if it doesn't change anything ... Thanks, Jean-François Doyon Internet Service Development and Systems Support / Développement des services et soutien de systèmes Internet GeoAccess Division / Division GéoAccès Canada Center for Remote Sensing / Centre canadien de télédétection Natural Resources Canada / Ressources naturelles Canada http://atlas.gc.ca Phone: (613) 992-4902 Fax: (613) 947-2410

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Moving objects via ZMI
by John Poltorak 11 Mar '04

11 Mar '04

Is it possible to move objects to a folder using the ZMI? I'm sure it must be doable, but it isn't immediately obvious how you can do it. -- John

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Folder permissions
by John Poltorak 11 Mar '04

11 Mar '04

If I create a new folder, should I expect to be able to upload files to it via FTP immediately, or do I need to enable FTP access in some way first? Does it make any difference if that folder is within a Plone site? -- John

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