June 2000 - Zope - Zope lists

ZCatalog counting?
by Alexander Limi 27 Jun '00

27 Jun '00

Hi, A presumably simple question: Is there an easy way to count the number of occurences of a certain meta type in a Catalog? E.g: I want a dtml snippet that outputs: There are 123 DTML Documents in the Catalog. I've browsed the howto's, but didn't find anything like this. Can anybody offer me some assistance? Thanks in advance, Alexander.

3 2

ZClass question?
by Webmaster 27 Jun '00

27 Jun '00

I am running 2.2.0b2 on a RH linux and have created a simple ZClass. All of my modified constructor objects work perfect however when I created a separate dtml method to add instances I get some weird errors. First when I try and create a new instance remotely I get a zope error "unauthorized" no matter what username and password I type. If I try and create a new instance locally on the same box (or within the internal network) I get a KeyError and then at the bottom of the same page is a second included page with a 404 file not found error. If I change the method from "post" to "get" so I can see if the new_goLiveDate is being passed I get the "unauthorized" error. Any idea what is going on? Here is my "add_instance_html" code. <dtml-call "REQUEST.set('goLiveDate',REQUEST.form['new_goLiveDate'])"> <dtml-with "manage_addProduct['myZClass']"> <dtml-call "myZClass_add(_.None,_, NoRedir=1)"> </dtml-with> <dtml-in "objectValues(['myclass'])"> <dtml-if "(_['sequence-item'].id == REQUEST.form['new_goLiveDate'])"> <dtml-call "REQUEST.set('new_goLiveDate',_['sequence-item'])"> </dtml-if> </dtml-in> <dtml-call "_['new_goLiveDate'].propertysheets.myZClass_info.manage_changeProperties({ 'title' : REQUEST.form['title'], 'summary' : REQUEST.form['summary'], 'text' : REQUEST.form['text'] })"> Let me know if you need more info. -Jamey

2 1

ProxyPass
by RC Compaan 27 Jun '00

27 Jun '00

Is there anyway to get around the fact that the remote ip is the server's ip if you use Apache's ProxyPass directive to pass requests on to Zope? Roché

2 1

DTML/ZClass question
by James W. Howe 27 Jun '00

27 Jun '00

I have a ZClass that I created to hold information about a person. The object has two attributes at the moment, name and bio. Elsewhere I have a page layout which makes reference to a "pageContents" value. I want to display my person objects using this layout but the object doesn't have a pageContents attribute. I added a pageContents method to the ZClass which references my "bio" property. The bio information appears, but if the bio text contains any dtml, the raw dtml code is displayed (actually it's not visible except if you do a "View Source"). I'm assuming that what is happening is that somehow my "bio" information isn't being rendered, but is being returned intact as a string which ultimately gets stuck in my browser page. My question is this, what is the recommended way to create an "alias" for a property defined in a ZClass? Thanks. James W. Howe mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103

2 1

Re: [Zope] Kinterbasdb
by Chris Beaumont 27 Jun '00

27 Jun '00

Hi David, Thank you for the thoughtful response.. I agree that having KInterbasdb would not solve our DA problem, but at least it would let me use the new Interbase Storage option.. A few people have been successful doing this, (compiling KInterbasdb with IB6beta) perhaps one of them could write up a HowTO? Thank you. Chris Beaumont David Trudgett wrote: > > At 2000-06-23 11:40 -0700, you wrote: > >Hello.. > > > >I hope this isn't asking too much... > > > >Can someone who has successfully compiled Kinterbasdb for use with Zope > >make non-programmer-friendly information on how to compile it for the > >current glibc and Version of Interbase (6.0 beta) available? I haven't > >been having any luck and my email to the author has bounced.. > > Even having Kinterbasdb compiled would not be the end of our problems. I > believe a DA (Database Adapter) for Zope would still need to be written, > and that would be a reasonably onerous task (even though there's a howto > that says it's easy -- all things are relative I suppose). Given that > you're a non-programmer, the task is well-nigh impossible. (I'm a > programmer myself, but I don't think I have the required experience in > database API programming/Zope/Python to make it reasonably feasible for me > to do it (though I would like to, because I would like to access InterBase > database(s) from within Zope). > > I understand that the InterBase people are interested in getting InterBase > working with Zope, and there is/was even an initiative to bring Zope and > InterBase close together so that InterBase could serve the function that > the ZODB currently fulfills. The InterBase people themselves are, of > course, flat out at present getting version 6 ready for release within the > next few days (unless they break their stated deadline of the end of June). > > A possible work-around until an InterBase DA is available, might be to use > IBPerl and Perl CGI or mod_Perl under Apache to read the InterBase database > and output the required results, but wrap those results with Zope stuff > (using SiteAccess, i believe). I'm only just starting to think about doing > this myself, so don't ask me for any more detail than that! (Unfortunately, > that suggestion may be a bit difficult if you don't program in Perl.) > > Good luck. > > David Trudgett

1 0

ZOracleDA and Zope 2.2?
by cs＠comlounge.net 27 Jun '00

27 Jun '00

Hi! I am encountering the following problem when using ZOracleDA 2.2.0b1 and Zope 2.2b2/3: When creating a ZOracle Connection and giving the wrong connection string then whole Zopes crashs with OCI_ERROR at oci_8.c:283 ORA-12541: TNS:no listener OCI_ERROR at oci_8.c:283 ORA-12154: TNS:could not resolve service name (this is just a test with no Oracle running). Sometimes it automatically restarts but sometimes not (after the second try). I cannot remember to have this seen in 2.1, so a new bug? (When you give the right string everything is ok) regards, Christian -- COM.lounge http://comlounge.net/ communication & design info(a)comlounge.net

1 0

Re: Slow File Access With LocalFS
by Jonothan Farr 27 Jun '00

27 Jun '00

It sounds to me like the Apache server is just writing the data directly to the HTTP connection as it is read. I believe that's how HTTP "streaming" works. I also believe this is possible to do using the Zope HTTPResponse object. Does anyone have any ideas? --jfarr "Perl is worse than Python because people wanted it worse." Larry Wall, 14 Oct 1998 ----- Original Message ----- From: Rob Pratt <rpratt(a)metcruz.com> To: <jfarr(a)real.com> Sent: Tuesday, June 27, 2000 10:56 AM Subject: Re: Slow File Access With LocalFS > Hey, thanks for the quick reply. > > > No, it just takes a while to read a very large file and construct the > ZObject > > (performance patches accepted ;)). It can also take a while to download > them > but > > that should be obvious. How is it that you're "streaming" the mp3 files? > > Sorry. Streaming is not exactly the right word I think. What I have set up > is that Zope delivers a playlist (*.m3u), which is opened by a player on > the > local machine (assuming there's one installed), and the player app in turn > makes a request for the actual mp3 file, which starts playing as soon as > it's properly buffered in the player app. That avoids having to download > each mp3 before playing it. > > I had the collection stashed behind an Apache rewrite rule, but when I > checked out LocalFS, I decided to try to move it into Zope under a LocalFS > object (which I can use to control access to the files more easily than in > Apache). Using Apache rewrite, requests for mp3 files just bypassed Zope, > and "streaming" was immediate. But handled as a LocalFS object, mp3 file > requests (I guess from your reply) have to wait to create the ZObject > before > they start "streaming." > > Is there a way to get LocalFS to serve up the file without creating a > ZObject? > > Wish I knew more about Python and programming. (I'm workin' on it, but it's > a steep learning curve for a newbie like me.) I'd jump in and see if I > could > come up with a performance patch. > > Anyway, I've just started learning Zope, and I see that it has immense > possibilities for automating a lot of what I do in my day job (I'm an > editor > for an alternative newsweekly in Santa Cruz, Calif., USA). The application > I > envision will probably make heavy use of the LocalFS product. > > I was hoping that it would be easy to digitize our extensive demo library > on touring > bands so that I wouldn't have to lend CDs to writers who never seem to > return them ;) I could just get an intern to rip CDs into mp3s and post > them > on a password-protected mp3 server, and all the writers could have 24-7 > access. > > That's just one feature. Many, many others that I can think of (not > involving mp3s ;)) could take hours and hours of work off of my weekly > workload. >

1 0

Re: [Zope] ZODB/FSSession TransactionError
by Brian McClain 27 Jun '00

27 Jun '00

>On Tue, Jun 27, 2000 at 02:40:49PM -0400, Brian McClain wrote: >[...] >> I have plenty of disk space and have tried reinstalling FSSession/Zope, >> rebooting, etc... >> >> I am running Zope 2.1.0 and FSSession 0.3.1 > > What operating system do you use ? Have you checked the partition on >which Zope resides for filesystem errors ? > >-Petru I'm using linux 2.0.36 (redhat 5.2). When rebooting, fsck checked the partition Zope resides in and gave it a clean bill of health. -Brian

1 0

Newbie: String work
by Andy Gates 27 Jun '00

27 Jun '00

Simple stuff from the simple people today: string manipulation. I have a string variable which has various chunks delimited by double tildes ~~. In order to do what I need to do, I need to extract the section of the string after the last double-tilde, so that "fred~~bloggs" returns "bloggs" "fred" returns "fred" "fred~~bloggs~aardvark" returns "aardvark" I can see that rfind is the thing I need to use, but as usual (gah! newbie!) I'm stuck on the syntax. Help! ---------------------- Andy Gates, Learning and Research Technology Andy.Gates(a)bristol.ac.uk - ICQ#74362415

5 5

standard_html_header/footer for Help system in 2.2
by Ron Bickers 27 Jun '00

27 Jun '00

The help system in 2.2 is looking great, with a minor annoying "feature". The left-side navigational window uses my standard_html_header and footer, which is not at all appropriate for a navigational window (it includes navigational bars of its own and causes a big horizontal scrolling situation). The right-side topic window has its own very basic header and footer. Is there a way (short of me modifying the help system) to get it to use a more plain header/footer? Maybe it should not use mine at all, but use its own as does the Zope management interface itself. _______________________ Ron Bickers Logic Etc, Inc. rbickers(a)logicetc.com

1 0