- Zope - Zope lists

Re: [Zope] evaluating a string as an expression
by Tony McDonald 20 May '02

20 May '02

On 4/3/02 9:17 pm, "Greg Conway" <greg(a)gmlnt.com> wrote: > Hi Tony, > > Yes, this is almost exactly what I am after, however I have one further > question based on your answer! > Greg, I've cc'ed the list as it may help others. >> >> It looks like you create variables from a form, specify1, specify2 ... >> specifyn > > Exactly! Created with a <dtml-in> loop based on an SQL method returning a > variable number of rows, therefore I am unsure of the value of n. Something like? <dtml-in stuff> <input type='text' name='<dtml-var specify_var>' value='<dtml-var specify_value>'> </dtml-in> So you end up with <input type='text' name='specify1' value='182'> <input type='text' name='specify2' value='13'> <input type='text' name='specify3' value='29'> <input type='text' name='specify4' value='27'> ??? >> This is easier to do in python though (pass my_list as parameter) (again, >> untested, and no checks to make sure those variables *do* exist) >> >> request=context.REQUEST >> for a_var in my_list: >> print request[a_var] >> return printed >> > > This is where the problem lies. I cannot create a list (afaik!) as these are > variables placed in the REQUEST by a form submit button. Oh yes you can! :) <dtml-in stuff> <input type='text' name='specify:list' value='<dtml-var specify_value>'> </dtml-in> And you use it like this in the target form. <dtml-in specify> <dtml-var sequence-item> </dtml-in> Hth Tone -- Dr Tony McDonald, Assistant Director, FMCC, http://www.fmcc.org.uk/ The Medical School, Newcastle University Tel: +44 191 243 6140 A Zope list for UK HE/FE http://www.fmcc.org.uk/mailman/listinfo/zope

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exploring sessions
by alan runyan 20 May '02

20 May '02

one of the most common requests now a days (I've gotten over 10 requests in the past 3 days) is to provide PostNuke-like functionality that says: x registered users are online y anonymous users. of course this information is calculated using SESSIONS. I've only used SESSIONS for limited things. Now I'm trying to answer these peoples questions. And its pretty frustrating. I think I'm looking in the right place. but continually get nothing. here is my function that I am assuming would return *all* session information currently. I'm using Python2.1.3 w/ Zope2.5.1 sessions=app.temp_folder.session_data trees = [item[0] for item in sessions._ring] print [len(tree.keys()) for tree in trees] #always gives me 0 for each key also.. something strange.. [item[1] for item in sessions._ring] does not return any id that are present when I say (in a Python Script) print context.REQUEST.SESSION return printed I see an id but its much longer than any of the ones in the print [item[1] for item in sessions._ring] statement. I am exploring SESSIONS using interactive python. I also dont see where context.REQUEST.SESSION.set('somekey', 'some value') is done -- where in the source is this actually done? ~runyaga

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ZClass Products question - sub-classing
by Jeffrey Franks 20 May '02

20 May '02

Hi, How do I determine the classes I should subclass when creating a ZClass object? I know what my new object is going to do generally, but how is the design decision made regarding which Zope base classes to sub-class from. We're obviously talking about interfaces and what the new object is expected to do. As a newbie, I know the names of the base classes, but have little understanding of what their interfaces allow them to do. Where do I get information about this? As an example: In the book "Zope Bible" page 478, the authors provide a simple application of FAQManager ZClass. The reader is told to sub-class from ZClasses: ObjectManager and OSF: Folder classes. How is such a design decision made when creating a new thingy? -- Jeffrey L. Franks (Web) http://www.motiftools.org (Mail) jfranks(a)quik.com

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Display logged-in username
by Martin Bernhardt 20 May '02

20 May '02

Hello, I'm running into problems trying to display the name of a user who has logged in. I use a frameset and in the top frame I want the username to be displayed. Therefore I use <dtml-var "AUTHENTICATED_USER.getUserName()"> which works fine as long as I'm inside the Zope management interface. It also works fine if I let only authenticated users view the frame page by granting VIEW and ACCESS CONTENTS INFORMATION rights to them only (and NOT the Anonymous User). However, as soon as I let Anonymous Users view the frame page (simply acquiring all permission settings), I get 'Anonymous User' from the above <dtml-var ...> statement whether I'm already logged in or not (I let users log in by letting them change their password on two protected sites). Is there a way to display the username on a non-protected site (which also works outside the Zope Management Interface)? If not, how can I find out if a user has already logged in or not? Any help is greatly appreciated. Martin

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Where is the Example code?
by Mark Chambers 20 May '02

20 May '02

Hi Folks, I'm new to Zope/Python/Wziki, etc. but very impressed so far. I would like to look at the examples, but I can't find the code anywhere. Can anyone tell me where is it hidden, how I can get it and how I can put it back on my server if I change it? Thanks, Mark Chambers

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ZMI Editor Corruption
by Dan Shafer 20 May '02

20 May '02

I edit my Zope sites primarily on my OS X system, occasionally using Win2k. Yesterday, I began noticing some unusual crud showing up in the Python script files I was working with on OS X. The first thing I noted was that the first few characters of the first line of a script had just disappeared. I went to a text file copy of the script on my local drive and copied the missing characters, went back to Zope and pasted them. Instead of the pasted characters showing up, I'd see several unprintable characters. You know, little rectangles, symbols, etc. I must have spent 15 minutes with the stupid thing trying to isolate the problem. I even re-copied the entire script and pasted it. It never got any better. Finally, I deleted the script, created a new object of the same name, and then pasted in the file on my disk. That appears to have worked. Is this documented behavior? Is my data.fs file perhaps corrupt? Any insights?

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Re: [Zope] Optimisation fun and games
by Anthony Baxter 20 May '02

20 May '02

>>> Bakhtiar A Hamid wrote > avoid personalizing public pages? ie - dont include "welcome Mr Foo Bar, etc > etc" That form of personalisation is the most obvious, yes, but in our case there's a lot more subtle stuff based on who's logged into the site. Actually saying "don't cache the body of the pages at all" is a simple way to make sure this is not screwed up. Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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Paid Design/Code Reviewer?
by Dan Shafer 19 May '02

19 May '02

I am nearing completion of my first medium-sized Zope application. While it works fine (and that is of course the primary acceptance criterion for the client!), I am reasonably sure I have not necessarily gone about this in the best, most effective possible way. From the basic design which started out creating a ZClass-based product and ended up using some loosely connected HTML forms, DTML Methods and Python scripts, to the scripting strategies themselves, I'm sure there's lots of room for improvement. I'd like to hire someone who is a really great Zope/Python designer and coder and who has both the patience and the desire to help me get to the next level of Zope/Python competence and confidence. I'd see this person beginning by reviewing all of my design and code and making specific suggestions for things that could/should have been done better/differently/more effectively. Then I'd like to take that input, which I'd prefer be in writing so I can chew on it and refer back to it as needed, and frame questions that drill down into specific techniques and tactics, submit those and get answers. If you're interested in doing this project, please email me privately (let's not clutter the list) with a brief description of your Zope/Python background and skills, and an indication of your hourly rate for this assistance.

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Zope Debugger -> ImportError
by Jens Wolk 19 May '02

19 May '02

Hi everybody, I try to set up a Zope debugger as described in http://www.zope.org/Members/michel/HowTos/TheDebuggerIsYourFriend I tried it with installations of Zope 2.4.0, 2.5.0 and 2.5.1 (followed the instructions in INSTALL.txt) but I end up always with the same error: cd $ZOPE_HOME/lib/python python Python 1.5.2 (#1, Mar 3 2001, 01:35:43) [GCC 2.96 20000731 (Red Hat Linux 7.1 2 on linux-i386 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam >>> import Zope Traceback (innermost last): File "<stdin>", line 1, in ? File "Zope/__init__.py", line 21, in ? import ZODB, ZODB.ZApplication, imp File "ZODB/__init__.py", line 14, in ? import sys, ExtensionClass, TimeStamp, cPersistence, Persistence ImportError: ./ExtensionClass.so: undefined symbol: PyObject_Init Can anybody help?

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Using Future Learning Enviroment with Apache and VirtualHostMonster
by Heimo Laukkanen 19 May '02

19 May '02

Hi all, I just spent a couple of hours banging my head to the wall since I have Future Learning Enviroment running in Zope on one box by it self and on other box behinf Apache. When running Apache the character encodings did not work, even though on every page caharcter encoding is said to be utf-8 with meta-tag. Everything worked when Zope was running by it self. The reason was Apache and it's behavior in AddDefaultCharset to set default encoding to ISO-8859-1 if nothing else is set, and it also overwrites whatever is set in the html-head-section. The answer was to set in the VirtualHost-section AddDefaultCharset Off, which then allowed browser to take the encoding directive from the html-page. This is very elementary, but first time that I had to work with these encodings and therefor the Apache's behavior came as news to me. Perhaps a word or two could be put about this to the installation document and/or README file on FLE? -huima

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