March 1999 - Zope - Zope lists

#raise problem?
by John Eikenberry 26 Mar '99

26 Mar '99

I just used the #raise tag for the first time, and its not working the way I thought it was supposed to. When I raise, I get always just get... Sorry, and error occured. (plus the traceback, but that's not relevant) Where my DTML looks like this...  You are not authorized to view this information.  (I didn't use Unauthorized as I didn't want an a login box) The problem is that I thought that it was supposed to display... You are not authorized to view this information. NOT Sorry, and error occured. Any tips? PS. The title is set to "Permission Denied" as its supposed to. --- John Eikenberry [jae(a)kavi.com - http://taos.kavi.com/~jae/] ______________________________________________________________ "A society that will trade a little liberty for a little order will deserve neither and lose both." --B. Franklin

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ZMySQLDA Problem
by Daren Sefcik 26 Mar '99

26 Mar '99

I am trying to use the ZMySQL component on a Solaris 251 machine, I have Pyhton 151 installed from sources and MySQL 3.22.16 from sources. Zope,Python and MySQL all work fine and the ZMySQL module compiled fine but when I try to "import" it from python I get the following error: Python 1.5.1 (#1, Mar 25 1999, 13:52:32) [GCC 2.7.2.3] on sunos5 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam >>> import MySQL Traceback (innermost last): File "<stdin>", line 1, in ? ImportError: ld.so.1: python: fatal: relocation error: symbol not found: __umodd i3: referenced in /usr/local/mysql/lib/mysql/libmysqlclient.so.5 I also tried it from a FreeBSD machine with pretty much the same result. Any ideas.???? TIA Daren

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Anyone using '-roman' in next-sequence tags?
by Tony McDonald 26 Mar '99

26 Mar '99

Hi all, just thought I'd check my sanity here... the way to get roman numerals showing up as the label on a batch object is :  <a href="query_start="> (Previous  results) </a>  isn't it? - I get a NameError, with the following traceback ('sub' is nowhere in my document btw)  ....  cheers tone ------ Dr Tony McDonald, FMCC, Networked Learning Environments Project The Medical School, Newcastle University Tel: +44 191 222 5888 Fingerprint: 3450 876D FA41 B926 D3DD F8C3 F2D0 C3B9 8B38 18A2

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RE: [Zope] Limitations of just using External Methods ?
by Michel Pelletier 26 Mar '99

26 Mar '99

> -----Original Message----- > From: chas [mailto:panda@skinnyhippo.com] > Sent: Friday, March 26, 1999 5:56 AM > To: zope(a)zope.org > Subject: [Zope] Limitations of just using External Methods ? > > > Hi zoppelgangers, > Ha! I like this, are you by change a Peak Freak? > 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) > These 'benefits' you feel you might be missing out on you might not need. One of Zope's best features is the fact that you can just use the components you want. In fact, it sounds like you may just need ZPublisher by itself. If you go to our site and look at the Components section you'll see where you can download it. ZPublisher is just the ORB part of Zope, it traverses your python module and calls your methods based on the URL. Now, you can still USE Zope with these application you write. Even if you write a pure ZPublisher application, you can then plug that application right into Zope with the External Objects product available in the contributed area. -Michel > chas > > > _______________________________________________ > 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] Unusual question
by Michel Pelletier 26 Mar '99

26 Mar '99

> -----Original Message----- > From: Tom Deprez [mailto:Tom.Deprez@uz.kuleuven.ac.be] > Sent: Friday, March 26, 1999 5:09 AM > To: zope(a)zope.org > Subject: [Zope] Unusual question > > > 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. > cool. > 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? It can do the same thing, and more. This isn't a hack on PHP3, but Zope has many more components and widgets out of the box. It's also object oriented, which helps when your components scales, or when you want your application to suddenly be stitched into four other application six months from now that you didn't forsee. >Or is this a complete different application? PHP has it's niche. Tony 'tone' McDonald mentioned that he thought code inside HTML is elegant, and it is, but it's even more elegent when that code is for the layout of your user interface only. Mixing application code with HTML, or worse yet, making your entire HTML document one huge script, is not so elegent. > 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) Zope is an Application written in a scripting language (Python) that is based on several components also written in Python and C. One of the components of Zope is Document Templates (DTML) which is also a scripting language. It's a bit complex, much more so than PHP's underlying system. Tony also mentioned that PHPs database itegration is excellent, and I'd like to add that Zope's is also top notch. A particular nice thing about Zope is it's database abstraction layer, what we call Database Adapters. You can write program for any SQL server and just change the DA when you change databases. Or your app could use two databases transparently; the DTML programmer wouldn't need to know which database is being queried, it would just be a case of calling the write SQL methods. This also give some compartmentalization. Your Python expert writes your external methods, your SQL expert manages DAs and writes ZSQL Methods, and your DTML/user interface expert uses all of these methods to layout the application. > > Are there people, using PHP3 next to Zope? > Comming soon. The problem is (rumor has it) that Apache sends Zopes output directly back to the browser, not giving it a change to run through any other handlers, like the PHP one. > ps. Has Zope the capability to easely make these scripts? I mean not > text-based , but in a certain IDE or RAD application? > There is a web based interface. The (IMO) ultimate programmer interface is emacs, which can use Zope with FTP (if your using ZServer). > 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. > Whew. Zope is a web application platform. It is a framework for writing applications over the web. It is more than this, because it supports more protocols than HTTP, but for your purposes you can call it a web app platform. Zope provides you with a standard set of services that your application can build on. Services include DTML, trasparent persistence of your data, interface to databases, a management interface for developing and managing your application, and a whole slew of out of the box objects for you to use (like documents, files, methods, DAs, mail transport, etc...) Many people have mentioned Python in responses to your question. Python is an incredible language, but I think the application you described can be done easily in Zope with no Python at all. All you need is DTML, some ZSQL Methods, and a good design and your done. -Michel > Thanks in advance. > > Kind regards, Tom. > > > _______________________________________________ > 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] external methods
by Service Informatique CHSR 26 Mar '99

26 Mar '99

Ok, I'm dumb. After some digging, I found that the problem lies in the expression 'self.l' 'self.' gives access to the object hierarchy, not the variables namespace. So, I solved my problem by writing 'self.REQUEST['l']' instead of 'self.l' Also, I think that this should be clearly documented. Apparently, the only way to acess variables namespaces in external methods is through self.REQUEST This confuses a 'normal' python user whose variable namespace is usually accessed through self. Can someone confirm (or infirm?) this? >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? Regards, Jephte CLAIN, Service Informatique PS: I have been looking for an explanation of the problem for two weeks, until I wrote to the mailing list, and voila! I found the cause of the problem myself :-) One can never be better served than by oneself...

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dtml: string to atoi?
by WWW Admin 26 Mar '99

26 Mar '99

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 / \

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URL and #tree trouble...
by Raver 26 Mar '99

26 Mar '99

Hi! A day or two since last question - now two new ones... Q1 My site is organized so that one folder keeps several other files and folders (containing files and folders and so on). Something like: Top [Folder] F1 [Folder] F2 [Folder] F2-file1 F2-file2 F2-folder1 [Folder] F2-folder2 [Folder] F2-folder2-file ... index_html (Top) has <A HREF="F2">F2</A> index_html (F2) has <A HREF="F2-folder1">F21</A> and <A HREF="Top">Top</A> Starting at URL: localhost/Top is fine and following links to F2 and from there on to F2-folder is correct (URL beeing localhost/Tope/F2/F2-folder1), but if I, when in F2, press the link to 'Top' something strange? happens: I get to Top all rigth, but the URL is now localhost/Top/F2/Top (Top beeing appended to the URL) What am I dooing wrong? Q2 Recently I got help on using the #tree tag, and apparantly everything worked all rigth, but ... I get the tree-view, can expand the tree pressing either foldernames or the '+' button - fine. But If I press the '+' button I'm not able top directly access the files appearing (404 error, file not found), I have to enter the folder first before I can get the file. This seems strange and I want to know if theres a solution to this. Heres my #tree href part: <A HREF="/"></A> Help is much appreciated Sture Lygren

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RE: [Zope] external methods
by Paul Everitt 26 Mar '99

26 Mar '99

> After some digging, I found that the problem lies in > the expression 'self.l' > > 'self.' gives access to the object hierarchy, not the variables > namespace. > > So, I solved my problem by writing 'self.REQUEST['l']' > instead of 'self.l' > > Also, I think that this should be clearly documented. > Apparently, the only way to acess variables namespaces > in external methods is through self.REQUEST > This confuses a 'normal' python user whose variable > namespace is usually accessed through self. I believe that you can just ask for it in your function signature: def my_method(self,l): return l + ' is cool!' --Paul

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7 minute response time! thank you rik and gilles
by WWW Admin 26 Mar '99

26 Mar '99

hi, a big thank you to gilles and rik for answering my dtml string to atoi question. never been on a mailinglist that had a 7 minute question- to-response time! cheers, webman --------------------------------------------------------------------------- webman | _ beehive GmbH | ASCII ribbon campaign ( ) berlin, Germany | - against HTML email X http://www.beehive.de | & vcards / \

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