February 2000 - Zope

Adding ZClass Instances via DTML
by Nico Grubert 15 Feb '00

15 Feb '00

>This dtml-method calls another dtml-method "add_dtml" which looks like >> this: >> >> <dtml-call "REQUEST.set('id','<dtml-var newID>')"> >> <dtml-with "manage_addProduct['BuchProduct']"> >> <dtml-call "BuchClass_add(_.None,_, NoRedir=1)"> >> </dtml-with> > >DTML tags don't work inside of other DTML tags. When you do <dtml-call >"REQUEST...etc">, the stuff in quotes is actually a python expression. Which >means, that if you want to use the newID variable, all you do is just put >newID in there, like: > ><dtml-call "REQUEST.set('id', newID)"> > >I think the rest of it looks good. > >Kevin Kevin, this makes no sense for me. Why should I add an instance by adding every time a new id and calling the method ? This really makes no sense for me ! I would like to use an input-type text and a submit button for adding an zclass-instances. Is this possible ? Nico

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Namespace + syntax question
by RC Compaan 15 Feb '00

15 Feb '00

I want to create a list of image thumbnails in a table. On every tenth item i want to start a new row. I thought the "fmod" function is appropriate. I get a syntax error however. My DTML: <dtml-in "PARENTS[0].objectItems('Image')"> <dtml-if sequence-start> <table><tr> </dtml-if> <dtml-if "_.fmod(_.['sequence-index'],10)=0"> </tr> <tr><td><dtml-var sequence-item></td> <dtml-else> <td><dtml-var sequence-item></td> </dtml-if> <dtml-if sequence-end> </tr></table> </dtml-if> </dtml-in> Any help or other suggestions would be appreciated. roché

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Re: [Zope] Catalog-aware ZClass not getting indexed?
by Darran Edmundson 15 Feb '00

15 Feb '00

>It's testing to see if it can acquire the ZCatalog which it has >been told to use. Since your newly created object is bare and >without acquisition context of any sort, this fails. >instance = instance.__of__(container) > >...right before you start playing with the index methods. Evan if you by chance find yourself in Australia, I'll buy you a beer. Is this Zope voodoo or straight Python class witchcraft? In humble admiration, Darran.

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Re: [Zope] Broken products after transferring Data.fs file
by Tres Seaver 15 Feb '00

15 Feb '00

"Brian K. Holdsworth" <bhold(a)awod.com> wrote: > I have seen a number of threads that talk about products becoming broken in > a Zope installation with no apparent cause. I had a similar experience the > other day. I moved my Data.fs file, which included several third-party and > custom made ZClass Products, from one server to another. After moving the > file, many of the ZClass Products were broken on the new server. > > In order to fix this, I ended up also moving the complete contents of my > lib/python/Products directory tree from the old server to the new one. This > fixed everything. However, most of the products that were orginally broken > did not depend on anything that was in the Products directory. Here is my > best analysis of what might have happened: > > One of the Products I was using was based on the "Renderable" add-on product > which is installed into the lib/python/Products directory. Initially, I did > not have this product on the new server. What I think happended is that the > abscence of this product caused several other unrelated products to appear > broken, even though they did not use "Renderable." If anybody can confirm > this through similar experiences, we can probably get the problem fixed in > the code. I'm pretty sure that this is the same problem that the PTK list discussed last week. It appears that, during Zope's startup, "one bad apple ... spoil[s] the whole bunch, girl" -- i.e., a Product which barfs (due to missing dependencies, in particular) seems to abort the whole product loading process. Most product's are hardened against exceptions thrown during their initialize() functions; this kind of problem could occur, however, during the module import. For instance:: # $INSTANCE_HOME/lib/Python/FooProduct.__init__.py import Foo # if this throws, nobody catches it? def initialize( context ): """ Initialize our product classes.""" try: # capture traceback to show on our management interface context.registerBaseClass( Foo.FooClass, 'FooBase' ) except: # throw all exceptions on stderr import sys, traceback, string type, val, tb = sys.exc_info() sys.stderr.write( string.join( traceback . format_exception( type, val, tb ) , '' ) ) del type, val, tb We probably need to harden the Zope product traversal process against exceptions triggered at "module scope". > > While this is an annoying problem, I am still BLOWN AWAY by how good Zope > is. What I didn't mention yet is that the old server was an Intel box > running Linux and the new server is a Sparc box running Solaris. I am very > impressed that my application and data moved from one platform to the other > so seamlessly. It is really awesome that Zope and the ZODB files that it > uses are so cross-platform friendly! Bravo to the developers! Amen, brother! Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Example of zope+mysql
by Marc Danai 15 Feb '00

15 Feb '00

Hi, I am new to zope and I am wondering if there are some example (links) about interaction between zope and mysql? How to to do this? Thanks. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

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Re: [Zope] Example of zope+mysql
by rh cassel 15 Feb '00

15 Feb '00

Dear Marc: Yes, from the How-to's -- first hit copied below. ZMySQLDA - from download to connection http://www.zope.org/ Members/alanpog/zmysqlda_steps Best regards, Robert (Bob) H. Cassel -----Original Message----- From: Marc Danai <m_danai(a)yahoo.com> To: zope(a)zope.org <zope(a)zope.org> Date: Tuesday, February 15, 2000 9:33 AM Subject: [Zope] Example of zope+mysql >Hi, > > I am new to zope and I am wondering if there are >some >example (links) about interaction between zope and >mysql? How to to do this? > >Thanks. > >__________________________________________________ >Do You Yahoo!? >Talk to your friends online with Yahoo! Messenger. >http://im.yahoo.com > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://lists.zope.org/mailman/listinfo/zope >** No cross posts or HTML encoding! ** >(Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope-dev ) > >

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Log File TimeStamp Curiosity
by Shaw, Mark 15 Feb '00

15 Feb '00

Hello All, Question: The time stamp being generated/written to my Zope log file is five(5) hours ahead of the actual time on my machine. Is there something I can do about that? I just restarted Zope, but that did not help. I am currently running Zope 2.1.3 on RedHat 6.1 -Mark

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Newbie dtml-var question (probably...)
by Chris Withers 15 Feb '00

15 Feb '00

Hi, I'd like to do something like: <dtml-var /images/logo> to include a logo and get the alt text from the object, etc, but it doesn't work. Any ideas? Also, and I've read a few threads about this but none really made sense to me, I work on sites at home and at work, with varying base URLS. 1. At home, URLs are something like localhost:8080/project/index.html 2. At work, they are something like zope.nipltd.com/project/index.html 3. And finally, the sites are often also presented as something like www.project.com. The problem is how to phrase URLs in hrefs. <A HREF="/index.html"> does not work for cases 1 and 2 as it goes to the root index.html on the server. however, it is the only way I can think to do links that work for case 3. This also applies to images if you reference them using <IMG> tags, which is how I'm currently dealing with the first problem (not nice, 'cos you have to maintain image size, alt text, etc by hand...) Any help greatfully recieved... Chris

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extracting day-month-year from a pre-epoch DateTime instance?
by Darran Edmundson 15 Feb '00

15 Feb '00

I have pre-epoch DateTime instance dates that I want to render a la <dtml-var birthdate fmt="%d %a %Y"> Obviously this doesn't work so I'm toying with <dtml-let numdays="_.int(birthdate-_.DateTime('01/01/1901'))"> [...] </dtml-let> where I need to compute the integer year, month and day corresponding to numdays (since 01 jan 1901). Seeing that human history didn't begin in 1970, this has got to be a common enough problem that either (i) there's a trick such that birthdate.strftime() actually does work or (ii) I'm missing something obvious. I bet on the latter as there is seemingly no mention of this on eGroups or the python FAQ ... Cheers, Darran.

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DTML-method id
by Eliot Scull 15 Feb '00

15 Feb '00

Hello, If this code is in a DTML-method <dtml-var id> then the id of the folder will be returned. If it's in a DTML-document, the id of document is returned. How can I programmatically get the id of a DTML-method within in the same DTML-method? Sorry if this is obvious. Much thanks in advance. Eliot Scull

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