April 2000 - Zope - Zope lists

break from <dtml-in>
by Chien-pin Wang 17 Apr '00

17 Apr '00

Hi, All: Quick question: How do I break from iterations in <dtml-in> tag? I couldn't find any information in DTML Reference. Please help and thanks! Chien-pin

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Accessing Documents/Methods/Properties from within External Methods.
by Daryl Tester 17 Apr '00

17 Apr '00

G'day, I have a fair bit of processing going on inside of a DTML Method, so I've decided to migrate the index_html to an External Method. I would like to leave a fair bit of the document generation to DTML Documents and Methods, because, what the hey, it does that best, but I've struck some lack of knowledge in the interfaces between Zope (ZPublisher?) and Python (mostly due to cluelessness on my part, but I just don't grok "Using document templates with ZPublisher" in the DTML guide). I'll dissect my problems in piecemeal fashion: def index_html(self, REQUEST, RESPONSE): "'Ere we go, 'ere we go ..." res = [] # Just so you know what res.append() is up to. Since I don't get a chance to pass these parameters in explicitly (eg if called by "http:/foo.com/bar/"), can I assume the underlying Zope machinery will _always_ fill these in for me? doc = self.getattr('standard_html_header') # Easy enough res.append(doc(self, REQUEST)) Can of worms time. I feel uneasy with the parameters to standard_html_header, as with the examples from DTML it is usually called with (_.None, _), so I've tried (None, self) as parameters as well. Both work. Which is the correct parameter order when calling a DTML Method/Document? Are python's self (as passed in) and DTML's "_" interchangeable? Certainly, self on its own as a parameter doesn't work, and causes an authentication challange, of all things (which usually fails). Finally, getattr won't always return a callable object (say, in the case of 'title_or_id'), but I won't know that in advance. Is there an attribute I can test for that determines when to call it, and when to just str() it (and are there conditions that fall outside of these two that I've listed)? Be gentle with me. :-) Regards, Daryl Tester

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Re: [Zope] Zope & international characters
by Rik Hoekstra 16 Apr '00

16 Apr '00

>Rik Hoekstra wrote: >> >> >Hi there, >> >I don't know if this has ever asked before... >> >I got Zcatalog on my Zope site and it runs beutifully >> >EXCEPT that it will only find words that are in English >> >-and 80% of my site is in Greek ! >> >> The finding part seems to imply you use the Catalog. If so, that is right, >> the Catalog only accepts standard ascii (as used for English). And in >> general, python (the language Zope works with) does not handle unicode. All >> this will probably change in the (not too far) future, but for now, there is >> not much to be done about it I'm afraid. > >This seems odd to me, as I've successfully used Catalog on portuguese >words that have accents. I set the locale using -L when starting up >zope, and everything works fine. > Ah, yes I now vaguely remember about the locale being introduced. Sorry if my post was misleading. The unicode part is still true though, and I wonder about the Greek characters... This could perhaps be solved by a locale I guess, after all it's just another encoding set. Mixing with English would be a bad idea, though. I do not dare to say much more though ;-( Rik

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Re: [Zope] Python Methods Caveats?
by Tres Seaver 16 Apr '00

16 Apr '00

Kapil Thangavelu <k_vertigo(a)yahoo.com> wrote: > > I was wondering why Python Methods seem to make > ZClasses very unstable. I've got a set of movies > Zclasses that i'm adding in via xml-rpc (to an > external method). The Classes and pages work fine > until anyone of them calls a python method within the > class that simply returns a fixed string date > representation. At this point all the Movie ZClasses > (instantations of one class) become broken through the > zodb, and i get dumped a bunch of ZODB errors at the > console about not being able to load state. i can > still add in new movies. when i was writing this > application things worked fine but now that i've > shutdown and restarted zope i've been getting these > errors. i vaguely remember chris petrelli (of dc) > saying something about python methods being bad for > zclasses at IPC8 (python conference). I realize that > the solution to my problem is basically moving the > python method outside the zclass (i hope) but i was > wondering if anyone could shed any light on the why of > the problem. "Evan Simpson" <evan(a)4-am.com> replied: > ----- Original Message ----- > From: Kapil Thangavelu <k_vertigo(a)yahoo.com> > > I was wondering why Python Methods seem to make > > ZClasses very unstable. > > This is the first I've heard of this. I make extensive use of PythonMethods > in ZClasses (and elsewhere) without any problems. Can you reduce the > problem to a minimal example which can be exported? If so, I may be able to > help. I believe the comment Chris made, and to which Kapil refers, was about ExternalMethods inside ZClasses, and not PythonMethods. I also frequently use PM's inside ZClasses without any problems. The assertion here seems to be that invoking a "read-only" PM breaks the product/ZClass in which the PM lives. Unless this is really a XXXPM, which also does some really nasty stuff as side effects, I don't believe that this behavior is possible (the code would need to be overwriting methods inside the ZClass, or replacing the class ID string, or other similarly hostile behavior). Please post the code to the method. Tres. -- ========================================================= Tres Seaver tseaver(a)digicool.com tseaver(a)palladion.com

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Re: [Zope] Python Methods Caveats?
by Kapil Thangavelu 16 Apr '00

16 Apr '00

My Apologies. sleep depravation can mask even the simplest of errors. the problem was not with the python methods. the cause as far as i have been able to determine was with my botched attempt to upgrade the LoginManager and to install ZPatterns. i'm not sure exactly what the problem was, i think i might have overwritten the LoginManager distributed with the PTK. i've since hosed that zope installation and reimported my classes into a fresh install where things work beautifully. thanks Evan for making a very cool product. Kapil --- Evan Simpson <evan(a)4-am.com> wrote: > ----- Original Message ----- > From: Kapil Thangavelu <k_vertigo(a)yahoo.com> > > I was wondering why Python Methods seem to make > > ZClasses very unstable. > > This is the first I've heard of this. I make > extensive use of PythonMethods > in ZClasses (and elsewhere) without any problems. > Can you reduce the > problem to a minimal example which can be exported? > If so, I may be able to > help. > > Cheers, > > Evan @ digicool & 4-am > > __________________________________________________ Do You Yahoo!? Send online invitations with Yahoo! Invites. http://invites.yahoo.com

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jobboard with offers
by David Pravec 16 Apr '00

16 Apr '00

Hello, as a Zope newbie i'm asking for help: Problem: --- I'd like to make Job board system where firms could post jobs, programmers will make price offers for particular jobs, and then the firm will choose who will (eventually) get which job. If there is no agreement /contract/ in some limited time (in order to make it easier for programmers, they don't want to wait until next week for a decision), offer is canceled. --- So I'm asking you for advice- * is there similar product i can use or cut&paste ? * is there anybody solving the same/similar problem who is willing to share/GPL the code? We can join our efforts to make it better... * if not, which products/classes i should use / start with? * if there are 50-1000 jobs per day, should I use mysql or postgres or zope objects or what (I'm ok with SQL)? Thank you for your time... David Pravec

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Hosting suggestions?
by Ken Kinder 16 Apr '00

16 Apr '00

I'm considering launching my own non-work Zope website. Can those of you who host your Zope websites on external service providers give me some advice on which one is best? I'm shooting for number of products availible, a database (MySQL, PostgreSQL, Oracle 8i, Gadfly - something), uptime, and hopefully a shell account. I will need it to map nicely to my domain name... Anything where I can use external methods and have a Unix shell account is a big plus. Thanks, Ken

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External method strangeness
by Jim Abrams 16 Apr '00

16 Apr '00

Ok I'm a zope newbie (abou 5 days), but I've come across some external method oddities. If I create a method such as def hello(self): return self.id then call it like <dtml-var "hello()"> I get back the name of the folder the method is contained in, as expected. However if I call something like... <dtml-var "hello('somestring')"> The 'somestring' is put into the 'self' param in the external method. Zope throws an exception saying that "string object has no attribite 'id'" Is that expected behavior? ---------- Jim Abrams jim(a)abramstechnology.com

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Oedipus v0.08 test release
by A.M. Kuchling 16 Apr '00

16 Apr '00

I'm making a new release of Oedipus, in order to incorporate some excellent work contributed by Sam Gendler. He's written a BsdDatabase class that uses BerkeleyDB instead of MetaKit, and has improved the Zope product for displaying an Oedipus dataset. (Namely, it should actually work now. :) Oedipus development is moving to SourceForge, so the new Web site for Oedipus is http://oedipus.sourceforge.net. It's quite possible that I broke something in incorporating Sam's patches, so please try out the new 0.08 release and report any difficulties. -- A.M. Kuchling http://starship.python.net/crew/amk/ Physicists like to think that all you have to do is say, these are the conditions, now what happens next? -- Richard P. Feynman

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Zope Eating Memory for Breakfast
by Monty Taylor 16 Apr '00

16 Apr '00

Would anyone happen to have any idea why something like this would happen? This is on Solaris 2.7 with Zope 2.1.4. I can provide any other info you like, but I'm not sure what would be useful to know. ------------------------------------- load averages: 3.21, 3.08, 2.72 13:02:57 117 processes: 111 sleeping, 2 zombie, 4 on cpu CPU states: % idle, % user, % kernel, % iowait, % swap Memory: 4096M real, 66M free, 4080M swap in use, 3255M swap free PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND 5866 zope 8 10 0 2262M 2034M cpu2 149:09 24.70% python 1983 goldtest 4 0 0 37M 32M cpu3 24:54 24.62% tag_event 2370 goldmine 4 0 1 123M 116M cpu1 9:40 23.52% perl 2894 root 1 0 0 1584K 1184K cpu0 0:00 0.44% top 2372 oracle81 1 58 0 115M 85M sleep 1:20 0.34% oracle -------------------------------------- This happens regularly, as in, every few days I have to restart Zope. When I do python drops out of top altogther. Ideas? Please? Monty

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