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My Way of Zope Programming
by Thomas Guettler 10 Aug '02

10 Aug '02

Hi! After using Zope more than one year I want to share my experiences with you That's what I think: 0. Learn python 1. Don't programm Zope TTW (Through the web) This applies if you have a small group of developers. If you have many developers who know HTML editing TTW might be for, but then this text does not apply This means: Use Python Products 2. Don't use ZPT, DTML or ZClasses. I spent to much time searching for the line were the error occured. Since I use python I no more have theses problems. Example: def foo(self, REQUEST): "docstring" .... ret=[] ret.append(self.root.standard_html_header()) ret.append(""" <your tag> %s <foo>%s</foo> </your_tag> .... """ % (var1, var2)) return string.join(ret) 3. Don't use acquisition. The only part where acquisition is usefull is for the standard_html_header See the example above how to do it without it 4. If you are starting a new project use ZODB for the storage and not a relational database. Soon directory storage will be stable and you have the latest storage solution 5. Use BTrees. They are very scalable. But pay attention: The keys must all be of the same type. What do you think about it?

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How do you check for null search fields?
by Michael 10 Aug '02

10 Aug '02

I have a search form with 3 different fields and need to verify that there is a value in at least one of them. I know that <dtml-if expr="some_field"> will test for one, but how do I determine if anyone of the three contains a value? I've checked the how-to's and Google but can't find anything. I'm using ZODB. TIA, Michael

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Root Problem
by Karen Roth 10 Aug '02

10 Aug '02

Erk. I have a problem. I went to implement the changes in a version I was working on and somehow something must have been conflicting (Although I'm not sure how, Zope is good about locking up the original version just for that reason). Now when I click on my Root folder (Where my version object was), I get an error telling me it can't access that URL. I can access all my other regular folders under the root through the left-side menu and can view about half the actual files via the web that I have stored under the root. But the rest of them are locked up (which I assume is where it thinks the problem is, is in one of those files) and I can't access the management screen, so therefore cannot go back and undo the version save to figure out what went wrong. Is there anyway I can fix this easily? Any help is very much appreciated. On a side note, thank you to the people who responded to me on zipping help, I almost have it up and running. Thank you in advance.

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Getting select contents from parent object
by VanL 10 Aug '02

10 Aug '02

Hello, I have an object with properties, and I would like to add to it a select-box as a property. However, I want the possible selections to be defined by a containing object. That sounds sort of confusing, so let me provide an example: In my Zope instance, I have a folderish object, 'apples'. The 'apples' folder has a function, 'list_apple_types', which returns a list: ['good', 'bad', 'red', 'granny']. Now I want to create an apple object and put it in this folder. When I create the apple object, I want to be able to give it a select property where the function that returns the list of possible selections is the 'list_apple_types' folder of the parent folder. The reason I want to do it this way is so that I only have to define that list once, and if I add a new type of apple to the list ('rotten'), then I don't have to go through and add this new possible select value to all of the apple objects in the apples folder. Can anyone tell me how to do this? I have been playing around and reading the docs, but I can't find a way to do this. Thanks very much, VanL

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Getting results of External Method
by Marie Robichon 10 Aug '02

10 Aug '02

Hi all, I have an External Method that parses a file and put the title, body, list of links, list of images into a dictionary. How do I now go about getting the info out of this dictionary? If I do a <dtml-var "filescript(REQUEST)"> it gives me the dictionary itself : {'title': 'Industrial Co-ordination Office', 'links': 'applications', 'index', 'partnershipweblinks', 'breakthroughs', 'pdf/applications.pdf', 'presentation', 'presentation', 'services', 'collaboration', 'workshop', 'documentation', 'techniques', 'techniques', 'pdf/techniques.pdf', , 'body':\r\n\r\n Beamlines\r\n\r\n (etc, etc), 'images': ['img/red.gif', 'img/indcodiv44.gif']} How do I get the value of each dictionary key back and how do I get rid of those horrible '\r\n\r\n". If I do a dtml-in it tells me that I cannot do a dtml-in with strings. TIA Marie Robichon Web Task Force European Synchrotron Radiation Facility BP 220 38043 Grenoble Cedex France http://www.esrf.fr Tel: (33) 04 76 88 21 86 Fax: (33) 04 76 88 24 27

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dtml-sqlvar and \n
by Michael Fischer v. Mollard 10 Aug '02

10 Aug '02

I ran into a little inconvenience with <dtml-sqlvar spam type="string"> where spam is like "spam \n eggs" (as string, not the charcter). sql_quote escapes this to "spam \\n eggs", which is not actually what I want. Is this intended and if, why? And is there a workaround other then usin <dtml-var>? MfG MFvM

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unique problem on how to use Zcatalog
by kamal hamzat 10 Aug '02

10 Aug '02

Hi, I need an urgent help o this issue pls. Problems Def: 1. write a script that search the zcatalog instance to return only Docs that have the same ids and pathindexes, displays few xters from each matches and set the URLs to the Full Docs. Thanks in anticipation. Sir k _________________________________________________________________ Join the worlds largest e-mail service with MSN Hotmail. http://www.hotmail.com

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LocalFS File Criteria
by Jose Gerardo Amaya Giron 10 Aug '02

10 Aug '02

Hello all. I have a couple of questions that involves LocalFS. 1.-I'm able to display the list of files that are in my LocalFS directory in dtml. How can I display the files the same way as I can see them in my localFS, I mean not just list the files but link them to the real file so the browser can deal with it. I was thinking of getting the attributes of the file and create a link in the dtml document to the real file, but it seems to be a cheap solution, what do you think? is there a better way to do it. 2.-Is there a way I can only display(list) the files following some criteria. I mean, for example to do something like 'ls *.pdf' or specifically a name, this in order to display just the files that the user wants. How can I do it? thanks in advance Gerardo Amaya

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Using Zope for Development, but export result as plain HTML?
by Timo A. Hummel 10 Aug '02

10 Aug '02

Hi, I've found many situations where I'd like to do a certain project in Zope, because it is much simpler to do automated menu's, content management and such, but there's no Zope support on the customer's server. Does anybody use Zope for develop Sites, but export them afterwards as HTML? If yes, what are the things somebody should take care of and how to export a Zope site properbly? Best regards, Timo

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Random ZServer exceptions
by Charlie Reiman 10 Aug '02

10 Aug '02

My development zope server just started spitting this stuff out on my console (Zope 2.5.1, Solaris, Python 2.1.3): ------ 2002-08-10T00:02:46 PROBLEM(100) ZServer warning: server accept() threw an exception ------ 2002-08-10T00:02:47 PROBLEM(100) ZServer warning: server accept() threw an exception ------ 2002-08-10T00:02:48 PROBLEM(100) ZServer warning: server accept() threw an exception ------ 2002-08-10T00:12:27 ERROR(200) ZServer uncaptured python exception, closing channel <ZServer.HTTPServer.zhttp_channel connected 192.168.1.70:2672 at 0x8c3315c channel#: 918 requests:> (socket.error:(32, 'Broken pipe') [/home/creiman/zope/ZopeCVS/Zope/ZServer/medusa/asynchat.py|initiate_send|21 3] [/home/creiman/zope/ZopeCVS/Zope/ZServer/medusa/http_server.py|send|414] [/home/creiman/zope/ZopeCVS/Zope/ZServer/medusa/asyncore.py|send|338]) ------ 2002-08-10T00:12:27 ERROR(200) ZServer uncaptured python exception, closing channel <ZServer.HTTPServer.zhttp_channel connected 192.168.1.70:2676 at 0x8c92f7c channel#: 922 requests:> (socket.error:(32, 'Broken pipe') [/home/creiman/zope/ZopeCVS/Zope/ZServer/medusa/asynchat.py|initiate_send|21 3] [/home/creiman/zope/ZopeCVS/Zope/ZServer/medusa/http_server.py|send|414] [/home/creiman/zope/ZopeCVS/Zope/ZServer/medusa/asyncore.py|send|338]) These seem to happen during mouse rollovers of rollover images. These images are wrapped with a Accelerated HTTP Cache Manager, which no longer shows any "Authenticated hits" stats, only Anon. ones. Any idea what might be causing the exceptions or how I fix it?

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