July 2000 - Zope - Zope lists

Squishdot giving DateTimeError(newbie)
by Rajil Saraswat 06 Jul '00

06 Jul '00

hi I am trying to setup squishdot. I had correctly setup the system(psotings etc were going on fine), but a weird thing happened as the 12 in the night passed by the squish stopped running. it is now giving Error:DateTimeError ErrorValue:UnrecognisedTimeZone I am running zope on MandrakeLinux7.1, is the time on the system got to this or is this a squish problem. Thanks for any clues

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Re: [Zope] How do I specify a list element?
by Dieter Maurer 06 Jul '00

06 Jul '00

asjf11(a)uaa.alaska.edu writes: > I have a list (I think) created this way: > > (date = '31-DEC-1999') > > <dtml-call "REQUEST.set('MyList', _.string.split(date, '-'))"> > > so now REQUEST['MyList'] should contain 3 elements: > 31 DEC 1999 > > How, in dtml, do I say "give me the value of the 1st element of MyList" or > the second or third. > > I've tried <dtml-var "REQUEST['MyList'][0]"> but I get this error: > > Error Type: TypeError > Error Value: argument 1: expected read-only character buffer, > Missing found > Now I don't know which part this error is refering to, but anyhow I want > this functionality. I expect that your "date" looks like a string but in fact is an object. In this case, your error does not result from the "MyList[0]" but from th "_.string.split(date,'-')". Use "_.string.split(_.str(date),'-')", instead. Dieter

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Re: [Zope] getting queries of a database into variables?
by Dieter Maurer 06 Jul '00

06 Jul '00

Rajil Saraswat writes: > .... How do i put up queried data > into variables so i can conditionally check them? The result of an Z SQL method behaves like a list of row objects. Each row object behaves like an object with the columns as attributes. Thus you can use: <dtml-let query_result=Z_SQL_method <-- behaves like a list --> hits="_.len(query)" <-- number of hits--> > <dtml-if hits> <dtml-with "query[0]"> <-- opens direct access to columns of hit 1 --> <dtml-var column1> ..... </dtml-with> </dtml-if> </dtml-let> > Does there exist some readymade package for setting up cookie based > authorization. i could locate someting called LoginManager, but how do i > use it. Have a look at the Zope product GUF (Generic User Folder) --> zope.org; see also the respective HowTows. Dieter

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

06 Jul '00

Firestar wrote: > Check out Jakob Nielsen's website and you would know that speed of serving > webpages is one of the main usability factors. The bottleneck is not generally the speed of serving webpages, but rather, the speed of the client downloading the data from webpages, as the data has to go through N regions of the Internet between the server and client. Also, users tend to look at more than one webpage at a time, and so their incoming bandwidth per connection is reduced even further. The answer to this issue is to avoid large graphics and large pages, allow client-side caching, move the useful content of a site "forwards" towards its entrance, avoid banner adverts... -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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Newbie: Build Object Names
by Terry Babbey 06 Jul '00

06 Jul '00

I am trying to build my object names and it is not working. Here is my code done in three ways and only one way works. #1 <dtml-var "ProgCode+'AR'"> #2 <dtml-var name="T043AR"> #3  <dtml-var booger>  #1 displays T043AR on the screen #2 displays the Text I entered into the object (This is what I want) #3 again only displays the T043AR Any suggestions? I am hoping I just need some basic information to accomplish this. Thanks, Terry -- __________________________________________________________________ Terry Babbey Technical Support Specialist Lambton College, Sarnia, Ontario, Canada __________________________________________________________________

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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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