March 1999 - Zope - Zope lists

Re: [Zope] dtml: string to atoi?
by Rik Hoekstra 26 Mar '99

26 Mar '99

-----Original Message----- From: Rik Hoekstra [mailto:fghoekstra@cit10.wsd.leidenuniv.nl] Sent: vrijdag 26 maart 1999 14:17 To: WWW Admin Subject: RE: [Zope] dtml: string to atoi? > -----Original Message----- > From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of WWW > Admin > Sent: vrijdag 26 maart 1999 14:07 > To: zope(a)zope.org > Subject: [Zope] dtml: string to atoi? > > > hi, > > anybody know whether i convert a string to integer (atoi) via a dtml > tag? > try:  Rik Hoekstra

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Re: [Zope] dtml: string to atoi?
by Gilles.Lavaux 26 Mar '99

26 Mar '99

Hello This workd for me:  Another things I have already asked: how to do the same assigment on a date with a formating(to get only the year for ex.):  ???????? Thanks for any help. Gilles lavaux -----Original Message----- From: WWW Admin <webman(a)beehive.de> To: zope(a)zope.org <zope(a)zope.org> Date: Friday, March 26, 1999 4:15 PM Subject: [Zope] dtml: string to atoi? >hi, > >anybody know whether i convert a string to integer (atoi) via a dtml >tag? > >regards, > >webman > >--------------------------------------------------------------------------- >webman | _ >beehive GmbH | ASCII ribbon campaign ( ) >berlin, Germany | - against HTML email X >http://www.beehive.de | & vcards / \ > > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://www.zope.org/mailman/listinfo/zope > >(For developer-specific issues, use the companion list, >zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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RE: [Zope] Database connections
by Paul Everitt 26 Mar '99

26 Mar '99

Oleg wrote: > There are connections to different databases. So you said "one > connection to one database"? If you can use one connection string in Postgres to access multiple databases, then you just need one Database Connection. Otherwise, you'll need one connection per database. Note that I don't mean per table -- I don't know much about Postgres and don't know if it organizes tables into separate databases that are selected with a "use database" command. > > > It is bad, as I have many databases, so Zope eats up > > > memory. Another > > > problem - what would do Zope if I restart Postgres (so all current > > > connections break)? Would Zope reestablish connections or > just report > > > error? > > > > It should re-establish the connection. If it doesn't then there's a > > bug. This works fine with all the Database Adapters I've used. > > I'll retest, but currently, when I ask ZPygresDA to close > connection, > Zope reports "the site has technical difficulties" when I'm trying to > access the application. Right, which is the correct behavior, as you had disconnected from the database. I thought your question was about restarting _Zope_, so I had a misunderstanding. I don't know anything about the Postgres client library and whether it can reconnect to a server when the server is shutdown. This definately isn't a Zope issue though -- the client should handle it. --Paul

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external methods
by Service Informatique CHSR 26 Mar '99

26 Mar '99

Hello, I'm confused with external methods. Please help. I want an external method to access its context (for the purpose of acquisition, etc.). So I write: def myExtMethod(self): pass Within myExtMethod, I should be able to: - write self.REQUEST to access the current REQUEST object (I need to be able to modify the current REQUEST object with self.REQUEST.set(...)) - or for example self.myzsqlmethod() to call a zsql method object, right??? Let's suppose that myExtMethod is: def myExtMethod(self): l=[] for i in self.l: l.append(i+1) self.REQUEST.set('l', l) Now, how can I call this method from DTML?    All don't work. I end up in a traceback. "read only class, buffer" Any hints? Jepthe CLAIN Service Informatique CHSR

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AW: [Zope] external methods
by Stefan Franke 26 Mar '99

26 Mar '99

Hi Jepthe, First, if you want to acces the REQUEST object, you need to declare it as a formal parameter: def myExtMethod(self, REQUEST): ... REQUEST is then passed automatically by Zope's internal magic, which looks up formal parameter names and matches them to arguments from HTML forms, HTTP Headers, etc. The "read only class, buffer" traceback is due to a very annoying bug in ExternalMethod.py and screws up any other error messages in external methods. I can't remember exactly if it was in line 254 or 256 in ExternalMethod.py, but here's the code I use to fix it: ExternalMethod.py, from line 254 if type(error_type) is type('') and lower(error_type) in ('redirect',): raise error_type, error_value, tb if (type(error_value) is type('') and regex.search('[a-zA-Z]>', error_value) > 0): error_message=error_value else: error_message='' With that you should get better error messages. Regards, Stefan PS:   should be both OK Service Informatique CHSR wrote: > Hello, > > I'm confused with external methods. Please help. > > I want an external method to access its context (for the > purpose of acquisition, etc.). So I write: > > def myExtMethod(self): > pass > > Within myExtMethod, I should be able to: > - write self.REQUEST to access the current REQUEST object (I > need to be able to modify the current REQUEST object with > self.REQUEST.set(...)) > - or for example self.myzsqlmethod() to call a zsql method object, > right??? > > Let's suppose that myExtMethod is: > > def myExtMethod(self): > l=[] > for i in self.l: > l.append(i+1) > self.REQUEST.set('l', l) > > Now, how can I call this method from DTML? > >  >  >  > > All don't work. I end up in a traceback. "read only class, buffer" > > Any hints? > > Jepthe CLAIN > Service Informatique CHSR >

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Unusual question
by Tom Deprez 26 Mar '99

26 Mar '99

Hi, This is (I think) an unusual question on this thread, but I want to ask it. We are at the start of making an intranet, which will contain a database of procedures (how to handle some examinations etc). We want to make it able that people can query this database and get the information they want on there web-browser. A day ago, we were confinced that PostgresSql with PHP3 (www.PHP3.org) would be the solution to this problem. This on a RedHat Linux 5.2 system with Apache as web-server. But now we've seen Zope. I'm wondering..., can Zope do the same things as PHP3? Or is this a complete different application? How stand Zope and PHP3 next to each other? I believe PHP3 is a scripting language... I'm wondering : is Zope also only a scripting language? Or is it more? Is the scripting language (=Python?) more powerfull then Zope) Are there people, using PHP3 next to Zope? ps. Has Zope the capability to easely make these scripts? I mean not text-based , but in a certain IDE or RAD application? Please, say in some simple words what Zope is and for what it can be used... I've read the web-page. But since I'm a stupid person in this field of webservers I can't understand what they are explaining. Thanks in advance. Kind regards, Tom.

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Limitations of just using External Methods ?
by chas 26 Mar '99

26 Mar '99

Hi zoppelgangers, I have several applications built 100% with python CGI scripts that I'd like to run on Zope. The reason for this are : a) For the better performance (I was worried about the scalability of CGI for high-availability and knew I had to move to FastCGI or the equivalent) b) I really really like the way Zope takes care of the CGI variable handling (ie. declaring the HTML form fields as arguments in the python method). However, I don't really want to use DTML at all. The reasons is that I find it much harder to read than pure Python. This is just a personal aesthetic thing and no criticism of Zope at all (full kudos to Digicool on an excellent application). It's just coding aesthetic : I like it all kept in Python, like servlets in java (as opposed to CFML, ASP etc). So, I've put all of my CGI scripts in a newly-created extensions directory and registered them via the Zope web-manager. It was, as the documentation says, incredibly simple and it seems to work for simple methods. (I'll declare my own packages later). Now, if I just use External Methods like this (using my own ex-CGI Python scripts to query databases, IMAP etc), am I missing out on any of Zope's main benefits ? In particular, the cache management ? Would I have to turn my stuff into a Zope Product to get these benefits ? (I've not had too much joy with the Product stuff yet) chas

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Re: [Zope] The Artist Formerly Known as NotMail
by Brian Lenihan 26 Mar '99

26 Mar '99

At 12:01 PM 3/25/99 -0500, Michel Pelletier wrote: >IMAPAdapter is available in public CVS. > >Web CVS access will be here soon! (yippee!) I have a Zope sandbox which I would like to use to play with new features as they become available. Unfortunately, for the past several days my sandbox server has been broken because ExtensionClass/ComputedAttribute.c is missing. Is it missing on purpose? If so, is there a way I can work around it?

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Re: [Zope] ANNOUNCE: #try tag v0.1.0
by Jordan B. Baker 26 Mar '99

26 Mar '99

On Thu, 25 Mar 1999, Amos Latteier wrote: > At 12:32 AM 3/25/99 -0500, you wrote: > >Okay after I opened my big mouth I had to deliver. :) > > Way to go! This is a great contribution, and I'd love to see it go into the > standard distribution, assuming that you're agreeable to this. Thanks. Yes, please go ahead and use this in the standard distribution with whatever changes you feel are necessary. > I like this, but how about the fact that Python errors are classes, not > strings now? This implementation does not allow things like this: > >  >  >  > i got me a math problem >  > > Because this implementation has no notion that ZeroDivisionError is a > subclass of ArithmeticError. I'm not sure how hard it would be to get this > working, but it would be a nice addition. I suspect a matter of resolving. Probably be a two step procedure, 1) try to match the error by string exactly, otherwise 2) evaluate each handler in turn and see if the exception isa class. > Another small nit is that I think that you should use 'error_message' and > 'error_type' like standard_error_message does rather than 'errmsg' and > 'errname'. I have fixed this in 0.1.1 of the Product which is now available from the same directory as the original. I've also made some other additional fixes relating to the default error handler. Here's the file: ftp://ftp.spyderlab.com/pub/zope/Try-0.1.1.tar.gz Feel free to put this up in the contributed area on zope.org ------- Jordan B. Baker -- jbb(a)spyderlab.com weaving the web @ http://www.spyderlab.com

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RE: [Zope] handling exceptions in DTML
by Paul Everitt 26 Mar '99

26 Mar '99

Jordan wrote: > Is anyone working on patches to address this in the near > future? I'd be > willing to take a stab at it myself if not. Please, stab away! If you write the try DTML tag, we'll crown you Prince of Zope, or at least Most Honorable Potentate. Looks good on business cards and the girls really dig it. --Paul

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