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RE: [Zope] NOTICE: issue with database packing in current Zope re leases
by Dieter Maurer 06 Jul '00

06 Jul '00

Brian Lloyd writes: > > > Jim found a problem with the algorithm for packing the Zope > > > database that we wanted to announce so that folks can avoid > > > being bitten by it until the fix is out (in b4). > > > > I think this is a candidate for a Hotfix. > > > > 2.2 upgrades could be problematic and I think we might continue > > to see large numbers of 2.1.6 users until all the products run > > happily on it. > > Hm - the goal I had for Hotfixes was to address imperative > problems that couldn't really be addressed any other way. I'm > not sure that this _quite_ makes the grade in my opinion (but > I could probably be convinced). For example, a security problem > _demands_ a hotfix-type solution because you can't tell the > crackers out there "dont do that!". In this case, there is > a clear way to avoid the problem that *is* under your control > and a clear way to recover in case you forget :) It definitely is not an issue for me, because my Zope Sites are still small (I never did pack up to now). But large Zope sites with lots of temporary objects may need repacking before they consume too much disk space. Maybe, a patch would be a compromise. Sites that need to care can apply the patch. Those that do not, simply ignore it. The patch could be announced with the problem report. Dieter

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Persisting a dictionary as a object property
by Andy McKay 06 Jul '00

06 Jul '00

Hi all, Ok so I have an object, I have many properties persisting on the object using the wonderful PropertyManager. But I want to persist a dictionary. This isn't an option for the PropertyManager. I added a dictionary into the object just by adding the line: _map = {} But it only persists until I restart Zope... how do I make it last for ever? Thanks.

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the "manage_" methods
by Fabio Akita 06 Jul '00

06 Jul '00

Hello I am trying to realize how the manage_ DTML methods works. The only documentation that I found was a quick reference that just say that the methods exist with simple descriptions as: manage_addDTMLMethod(id, [title, file, REQUEST, submit]) But there is no details about how this works, what´s required. Is there any documentation about them? I am trying to do a webpage that can change the content of properties of a folder. Regards. []´s Fabio Akita - Developer F/Nazca S&S / Adversiting akita(a)fnazca.com.br

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Re: [Zope] Is Zope slow?
by Firestar 06 Jul '00

06 Jul '00

Hi Bill, thanks for your reply. ------Original Message------ From: Bill Anderson <bill(a)libc.org> To: Firestar <theebh(a)mail.com> Sent: July 6, 2000 8:19:39 AM GMT Subject: Re: [Zope] Is Zope slow? >Define slow. Slow compared to what? Doing what? >That's a ig difference between Zope and Apache and AOLServer. >they don't _do_ the stuff that Zope does. >Apache does little other than serve stati files, and take >output from cgis (or modules, same _basic_ concept). Zope >actually does the work. For some things Zope is appropriate, >and where it is, it outperforms (IME) Apache. For others, like >serving static content, it is slowER than apache. >of course, slow is all relative. I have a couple zope Servers >cranking out ~80 requests per second. Is that slow? ;) >That's ~6 Million requests/day. Cut it in half, for more >complicated tasks, and still moving along at a good clip. >What's better, try Apache doing the same things. >Does your next project invlove more than just static files >sitting on a >hard drive? Chances are, you'll be better off with Zope.... I have been programming with PHP and PERL, and they are quite fast, even when serving dynamic pages. Of course, they do not provide all the features of Zope, but they are able to handle things like sessions, authentication, database API...which is quite adequate for most small-to-medium websites. (although sometimes it's quite frustrating putting the modules together:) >Speed and Bencmarks are irrelevant when it comes to real-world >performance. :) benchmark may not be accurate, but i still think that speed is still impt. Check out Jakob Nielsen's website and you would know that speed of serving webpages is one of the main usability factors. But then again, if Zope really is THAT good, i may be inclined to switch over and use it as my main development tool in future; but the speed factor is still worrying me - i wouldn't want my website to 'crawl' when i'm presenting it to my boss or clients:) regards, thee ______________________________________________ FREE Personalized Email at Mail.com Sign up at http://www.mail.com/?sr=signup

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Python or DTML
by Peter Bengtsson 06 Jul '00

06 Jul '00

I know that Python is integrated _very_ closly to the Zope core, but to use a Python module you'll have to create an External Method and a file in the Extensions folder; and this might be slower than using DTML. Right? Basically, how much faster is DTML to Python (assuming the codes outputs the same thing)? The reason I ask is that I (probably as everybody else) want an as fast site as possible, but still use the power of Python. And also, whats the performance difference of using External python modules compared to the Python Method product? Peter Bengtsson - bloody good programmer Under UK Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of £500 damages/incident, £1500 for repeats.

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Re: [Zope] Newbe question concerning using python classes and external methods
by Richard Taylor 06 Jul '00

06 Jul '00

"Gaspard, Bradley S" <BRADLEY.S.GASPARD(a)saic.com> writes: > All, > > I am a new Zope user and I guess I'm missing something fundemental that I > haven't been able to glean from the documentation and various "How-to's". > As a learning tool I am trying to implement one of Brian Lloyd's examples I > found on the Web implementing a GuestBook. > > I suspect what I don't understand is how to write the external method that > would make use of this class (The one I have been playing with follows the > class definitions). Anyhow, I've created an an external method and call > (e.g. <dtml-var guest>) after which the guestBookForm is displayed. After > filling out the form and submitting it Zope does not seem able to find the > signGuestBook method. What am I doing wrong?? > I not to sure why you have gone down the route of doing all of this as an external method? I would have thought that the form should be generated from an DTMLDocument and a signal function in the External method could do the file-stuff and return the success page, no real need for the class at all. But, I guess you are just using this as a learning exercise, so what do I know. Zope can't find you signGuestBook function because it knows nothing about your GuestBook class. The only thing you have told it about is the ExternalMethod AddGuest. You could add another ExternalMethod something like (code not tested): def SignGuestBook(name,email): myGuestBook=guestbook.GuestBook('My GuestBook', 'guestbookdata.txt') return myGuestBook.signGuestBook(name,email) then create a DTMLmethod call signGuestBook: <dtml-var "SignGuestBook(name,email)"> you will need to add the SignGuestBook function as an external method in addition to the one you already have. You can see from this that the creation of an instance of the GuestBook class is pretty pointless because it only exists within the scope of the function in which it is created. Another thing to bear in mind (it caught me out recently) is that ExternalMethods are load once when Zope is started (or they are first called, I am not sure which) not every time they are called. This means that any global variables you create are common to every call. As Zope is multithreaded this may catch you out if you do not consider it. Hope this helps. Richard > Other than mostly trivial examples, I haven't been able to find many > complete (working) examples of using external methods. > > Thanks in advance for any help. > > """Module guestbook: a simple guestbook application""" > > class GuestBook: > """A guestbook object that provides both the forms > and the handling of submitted form data.""" > > def __init__(self, title, filename): > self.title=title > self.filename=filename > > def guestbookForm(self): > """Return the guestbook from to the user""" > return """<HTML> > <HEAD><TITLE>%s</TITLE></HEAD> > <BODY> > <H2>%s</H2> > Please sign our guestbook! > <P> > <FORM ACTION="signGuestBook" METHOD="POST"> > Name: <INPUT TYPE="TEXT" NAME="name"><BR> > Email: <INPUT TYPE="TEXT" NAME="email"><BR> > <INPUT TYPE="SUBMIT" VALUE="Sign Guestbook"> > </FORM> > </BODY> > </HTML>""" % (self.title, self.title) > > def successPage(self): > """Return a page to thank the user on success""" > return """<HTML> > <HEAD><TITLE>%s</TITLE></HEAD> > <BODY> > <H2>Thank You!</H2> > Thank you for signing %s! > </BODY> > </HTML>""" % (self.title, self.title) > > def signGuestBook(self, name, email='not specified'): > """Handle a submitted guestbook form""" > > # Open a file to save the guestbook entry > try: > file=open(self.filename, 'a') > except IOError: > file=open(self.filename, 'w') > entry='Guestbook entry: %s %s\n' % (name, email) > file.write(entry) > file.close() > return self.successPage() > > External method > > import sys > sys.path.append('/usr/local/src/Zope-2.1.6-linux2-x86/lib/python/Shard/jscap > e/winsat') > > import guestbook > > def AddGuest(self): > myGuestBook=guestbook.GuestBook('My GuestBook', 'guestbookdata.txt') > return myGuestBook.guestbookForm() > > Brad > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://lists.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope-dev )

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Calculate values?
by Peter Arvidsson 06 Jul '00

06 Jul '00

I am about to do <dtml-call "REQUEST.set('a', (a - b) * 15"> The problem is that I cant get the calculation right. a and b are text input in my form (int's) and I want to first calculate a-b and the take the answer times 15 before submitting the event. How can I do that??

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howto_GUF
by Mario Premke 06 Jul '00

06 Jul '00

Hi, I have installed Genreic User Interface with all the permission settings described in the README, but I cannot log into the folder which I want to protect. When I log in as "jorge" with passwd "secret" I get: Sorry, a Zope error occurred. Traceback (innermost last): File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/ZPublisher/Publish.py, line 179, in publish File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/ZPublisher/Publish.py, line 151, in publish File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/ZPublisher/BaseRequest.py, line 430, in traverse File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/Products/GenericUserFolder/GenericUserFolder.py, line 270, in validate (Object: ElementWithAttributes) File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/Products/GenericUserFolder/GenericUserFolder.py, line 308, in _basic_validate (Object: ElementWithAttributes) File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/zLOG.py, line 198, in LOG File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/Zope/ZLogger/ZLogger.py, line 18, in log_write File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/Zope/ZLogger/stupidFileLogger.py, line 40, in __call__ File /home/mapr/Zope-2.1.6-linux2-x86/lib/python/Zope/ZLogger/stupidFileLogger.py, line 62, in stupid_log_write IOError: [Errno 5] Input/output error Any hints will be appreciated ... Mario

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Proxy Roles
by Robert Wohlfahrt 06 Jul '00

06 Jul '00

Hi, i have a Problem using Proxy-Roles: i have following folders: /foo/ bar1/ comments/ TEMPLATE bar1/ comments/ TEMPLATE barN/ ....... /make_a_comment/ submit >From a DTML-Method in "make_a_comment" I want to copy the folder TEMPLATE in a spezified comments-Folder and change some properties. I wrote a dtml-method called "submit": <dtml-with foo> <dtml-with "_.getitem(the_bar_id).comments"> <dtml-with "manage_clone(VORLAGE,REQUEST['a_new_id'],REQUEST)"> <dtml-call "manage_changeProperties( prop1=REQUEST['new_prop_1'], prop2=REQUEST['new_prop_2], )"> </dtml-with> </dtml-with foo> Now I want to use a Proxy-Role for "submit" to make it possible for everyone to add a comment with this method. I added the proxy-role "manager" to the "submit"-method. But if I access submit as anonymous, Zope still means, I don't have permissions to add a folder to /foo/barx/comments/... Any ideas to solve this problem? I use Zope-2.1.4 on a RedHat Linux Thanks Robert -- Robert Wohlfahrt (robert.wohlfahrt(a)sachsen-net.com) Tel: 0179 / 2980074 Fax: 0351 / 2880145

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zope/python startup error
by tom smith 06 Jul '00

06 Jul '00

newbie question. when zope starts I get the attached error dialog. Any ideas how I can fix this since zope is running on a remote server? It seemed to start going wrong after installing a shed-load of products into zope. cheers tom ps. to go into greater detail... ...I have two copies of Python...one in Zope's "lib" folder, and another in "Program files". Do I "need" both? Are they getting their PYTHONPATHs mixed up? Ideally I'd like just one Python, but with the IDLE editor AND the Windows extensions (ODBC),is this possible and how would I do it. Can I add IDLE and ODBC to zope's python without breaking zope.

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