- Zope - Zope lists

Zope hangs with no visible reason
by Jakub Wisniowski 17 Jul '03

17 Jul '03

Hi Today was the second time when my Zope has hanged up. The same thing has happened 6 days ago. I've never got problems with stability since I have moved from Zope 2.6.1 back to 2.6.0. This was caused by experiencing a bug described in Collector (Issue 852). Here is some background: I run Zope 2.6.0 on Windows 2000 server. Products installed are: - CCSQLMethods - DCOracle2 (1.3 beta) - ZODBCADA - exUserFolder (0-10-10) My application works with Oracle 8i database and has about 150 users. There is no Apache in front of Zope yet. Why it hangs? I have checked event log and the last thing logged in before hang up was: - first hang up: 2003-07-11T17:44:22 INFO(0) ZODB conflict error at /cr/centralne/blokowanieDokumentow/blok/LFaktur (186 conflicts since startup at 2003-07-09T23:04:31) - and the second one: 2003-07-17T08:15:16 INFO(0) ZODB conflict error at /cr/centralne/rozliczeniaBezgotowkowe/dokumentDyspozycji/ przegladPozycji/wyborFaktur/listaFakturS/zapiszZmiany (663 conflicts since startup at 2003-07-14T08:19:55) ...iteration over the number of conflicts... 2003-07-17T08:25:17 INFO(0) ZODB conflict error at /cr/centralne/rozliczeniaBezgotowkowe/dokumentDyspozycji/ przegladPozycji/wyborFaktur/listaFakturS (669 conflicts since startup at 2003-07-14T08:19:55) The next logged thing in were standard messages of zope startup. Is it possible that conflict errors killed my zope? I think about patching my Zope installation with Dieter Maurer's ReadConflictError patch, but I'm neither sure this will help nor this will work with 2.6.0. Any ideas? Jakub

4 3

[ANNOUNCE] VarImage 2.2 (beta) Available
by Terry Hancock 17 Jul '03

17 Jul '03

VarImage is a Zope Product which allows images to be processed according to the URL used to access them, following a simple "chainable operator" syntax. Available plugins provide for resizing, thumbnailing, cropping, geometric transformations, and color space effects. Example: <zope_site>/my_image_jpg/G.s_200_300.png will "apply a green filter, resize to 200x300 pixels, and convert to PNG format". The new version fixes a bug in changing Zope id of an existing instance and fixes a misspelling which unfortunately affects the API (easy to fix though -- see the CHANGES.txt file). Download package from: http://www.anansispaceworks.com/papers_html#VarImage-2.2b.tgz Cheers, Terry -- Terry Hancock ( hancock at anansispaceworks.com ) Anansi Spaceworks http://www.anansispaceworks.com

1 0

Question regarding InvalidObjectReference and the storing of objects in the session
by Alec Munro 17 Jul '03

17 Jul '03

Hi list, I've had a system where I was storing object URLs in the session, and using restrictedTraverse to access the objects. I got it in my mind today that perhaps my knowledge of zope had expanded to the degree that I could figure out how to bypass this step and simply store the objects themselves in the session. So I've been working on that, and pretty quickly I start to get InvalidObjectReference errors (I'm pretty sure they were why I chose the more complicated method originally). So I did some searching and I think I have a better understanding now of why this occurs. The way it goes in my head is that an object in the ZODB (and possibly other sources) cannot be stored directly in the session. Unfortunately, this doesn't seem to completely describe the error, as I've found I am sometimes able to store objects from the ZODB in the session. For example, here are two lines of code, in the same file, sequentially, with the first one working, and the second one giving me the InvalidObjectReference. session['site']['current_category'] = container.site.about #references a folder session['center_panel'] = container.site.display_category #references a page template I'm 95% sure this is the area that generates the error, because I've commented out the areas where the objects are retrieved. Thanks for any ideas, Alec Munro EOA Scientific Systems Traceback follows ('ssh' is an internal thing)

3 3

generalized viewer in zpt
by David Bear 17 Jul '03

17 Jul '03

I would like to create a generalized document/file viewer in zpt but I'm getting stuck in understanding some things. lets say I have a folder heirarchy like this: \ \myTemplates \publicDocument \publicDocument\stuff \publicDocument\stff2 where stuff[n] could be anything from a structure text doc, to dtml method, to a file, to .. any zope object. I would like to have some macro's in myTemplates that could automagically display whatever object it is. I'm thinking of something like ... <div metal:define-macro="stuffviewer"> <p metal:define-slot="main"> <tal:content="here/stuff"/> </p> </div> but my brain gets twisted. do I send 'stuff' to the zpt as a parameter, ie \publicDocument\myTemplate\macros\stuffviewer\stuff? the other side then is how can tal/metal 'know' that it should be doing something like <p tal:content="structure here/stuff"/> rather than <p tal:content="here/stuff"/> will I need to loop and test object type? -- David Bear phone: 480-965-8257 fax: 480-965-9189 College of Public Programs/ASU Wilson Hall 232 Tempe, AZ 85287-0803 "Beware the IP portfolio, everyone will be suspect of trespassing"

3 2

DTML Loop Iteration
by hpinson＠indepthl.com 17 Jul '03

17 Jul '03

I have a dtml looping question, Does anyone know how to iterate a loop using a counter within the loop for doing other things: <dtml-in "_.range(0,9,1)"> <dtml-in expr="SQL_getSubject(subject_id=3,standard_no=counter)"> Display stuff from query... </dtml-in> </dtml-in> Where 'counter' is an iteration variable of the loop. It is the 'counter' variable I am having trouble with then syntax for. Thanks! Harlow Pinson Indepth Learning Email: hpinson(a)indepthl.com Web: http://www.indepthl.com Voice: 505-994-2135 FAX: 208-475-7678

2 1

Long running process
by Florian Reiser 17 Jul '03

17 Jul '03

Hi folks, I use Zope 2.6.0. I want to compute and display large pdf reports over the web. While computing the file, the browser times out. So I followed the following howto on zope.org: http://www.zope.org/Members/don/long_procces Because I want to display the pdf file directly after processing, my redirection page checks for a session variable called pdf and returns the content of the variable as pdf file, if found, else it returns a html page refreshing after 10 seconds. While debugging, I've found out, that the variable never gets set, when the browser times out, so the redirection page is looping forever checking for the resulting pdf code. Whats wrong? Can somebody plz help me, because I'm getting mad. Regards Florian Reiser

2 5

Re: Handling of Multiple :list's
by Julian Clark 17 Jul '03

17 Jul '03

Hello again :list. Please ignore my previous email, I just realised how flawed my logic was. Better go back to the drawing board first. Sorry to be a bother. Julian ----- Original Message ----- From: "Julian Clark" <julcla(a)b-online.com.au> To: "zope" <zope(a)zope.org> Sent: Thursday, July 17, 2003 8:20 AM Subject: Handling of Multiple :list's Hello List, or should I say Hallo :List =) I'm trying to work out how to do, or even if it is possible, to handle two :lists within nested in statements... How would I make this reference the correct lists.   <dtml-call "REQUEST.set('amount',_['sequence-item'])"> // using amount list <dtml-call "REQUEST.set('dealer_no',_['sequence-item'])"> // using marketing list    Thanks Julian Clark

2 1

RE: [Zope] Issue Tracker
by peter＠mail.grenna.net 17 Jul '03

17 Jul '03

As it is now, just download the gzipped file from Zope.org. It will be worth getting used to CVS for future releases if you need urgent bugfixes as they come to the CVS version faster than releases on Zope.org. Peter Original Message: ----------------- From: Christophe Cornil cco(a)clear2pay.com Date: Thu, 17 Jul 2003 13:42:47 +0200 To: zope(a)zope.org Subject: [Zope] Issue Tracker Hi all, I'm newbie in zope. I saw that there's an opportunity to use a issue tracker (http://www.zope.org/Members/peterbe/IssueTrackerProduct) But one thing I don't understand for the installation is the CVS stuff. What am I sensing to do? Browse the CVS Root? Install a CVS client and do something? Thanks -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .

1 0

Memory Requirements and SQL Results
by Jim Kutter 17 Jul '03

17 Jul '03

I'm using Zope to interface with a MySQL back end storing files as BLOBs. For files in the neighborhood of 1MB+, I get MemoryError exceptions when I call my 'insert' SQL method. The file gets uploaded to Zope just fine, but inserting the body throws the exception. What is the best way to stuff potentially large amounts of data into an SQL database via Zope without fear of a MemoryError? -jim Here is my code (this is a python script which is the action of the input form - these are not in a product): (insert is a SQL method which takes mime_type, filename, data, length as parameters) request = container.REQUEST response = request.RESPONSE ... file = request.form['resource_file'] data = file.read() request.set('mime_type', file.headers['Content-type']) request.set('data', data) size = len(data) request.set('length', size) filename = file.filename[file.filename.rindex('\\')+1:] request.set('filename', filename) context.insert()

1 0

Re: [Zope] Zope hangs with no visible reason
by Jaroslav Lukesh 17 Jul '03

17 Jul '03

> Odesílatel: Jakub Wisniowski <jakub.wisniowski(a)euro.coig.pl> > Today was the second time when my Zope has hanged up. The same thing has > happened 6 days ago. > I've never got problems with stability since I have moved from Zope > 2.6.1 back to 2.6.0. This was caused by experiencing a bug described in Collector > (Issue 852). > Here is some background: I run Zope 2.6.0 on Windows 2000 server. Hi, I was have Zope 2.5.1 at W2k server too. It hangs or deads without any message to logs manytimes. Now I run my zope under Linux without any problem (cca 120 days). Regards JL.

1 0