November 2000 - Zope

ZClass
by kosh 11 Nov '00

11 Nov '00

>From inside what object should I inherit from to get a history option for a zclass or what method would I need to write. I have looked at lots of examples of zclasses and so far none of them have a history tab. I am working with the STX_Document type and made a new zclass based on that which includes renderable and catalogaware as base classes. Those were the instructions on the STX document page but that still did not give me the option for a history tab but it did fix other things that I needed. Thanks Kosh

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ZClasses & inheriting property(sheets) : yes/no?
by Aaron Straup Cope 10 Nov '00

10 Nov '00

Hi, If I create a ZClass that inherits another ZClass, do I also inherit the latter's properties/propertysheet? From what I've read so far, I thought the answer was yes but I can't seem to figure out how to *get* at them. I created a ZClass called "Foo" that inherits a ZClass named "Meta". Meta had two properties : author and title but neither appear to be set when I create a new Foo object. I banged out something in plain-old Python (see below) since I was pretty sure this was the kind of thing Python was so good for (I am normally a Perl weenie....shhhhh :-) and everything worked fine. I've been looking around the docs and the how-to's but nothing seems to discuss the idea of inheriting properties (?) across ZClasses. Is it possible? Thanks, class Meta: def __init__(self,title,author,timestamp,keywords,body,public,display): self.title = title self.author = author self.timestamp = timestamp self.keywords = keywords self.body = body self.display = display self.public = public **** from Meta import Meta class Library(Meta): def __init__(self,title,author,timestamp,keywords,body,public,display,foo,bar=""): Meta.__init__(self,title,author,timestamp,keywords,body,public,display) self.foo = foo self.bar = bar **** from Meta import Meta class LibraryClass(Meta): def __init__(self,title,author,timestamp,keywords,body,public,display): Meta.__init__(self,title,author,timestamp,keywords,body,public,display) *** # from yadda yadda import ... lib = Library("budwork","bud","now",["foo","bar"],"bobdy",1,0,"foopybird") libclass = LibraryClass("classwork","bud","now",["foo","bar"],"bobdy",1,0) print "Class Title is " + lib.title print "LibClass Title is " + libclass.title

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Re: [Zope] bookmark importer
by zope＠concision.com 10 Nov '00

10 Nov '00

"Philipp Dunkel" <philipp(a)zreal.net> writes: > Hello guys I' have here a pyton file that allows you to import your > bookmarks from IE. > The following prob is that it works on windows98 zope 2.2.2 and not on a > unix system. > The file temp.txt stays empty and you get the message 'unable to export > favourites' > > anyone any idea? Have you account for differing end-of-line conventions on the 2 platforms?

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RE: [zope] sudden ZClass breakage
by James Sintz 10 Nov '00

10 Nov '00

Only seen a couple of posts on this and the suggested fixes did NOT work. My ZClass was working fine until I added a new string type property and now my date type property seems broken. At least broken when I attempt creating an instance via my custom add form. If I add an instance via the management screen it works fine. I have gone as far as scrapping my custom form and rebuilding it. I can't see any reason why I would be getting "Invalid Date-Time String", especially when it was working fine. I'm happy post my code if that will help. Any ideas?? Jamey > -----Original Message----- > From: Timothy Wilson [SMTP:wilson@visi.com] > Sent: Friday, November 10, 2000 4:46 PM > To: James Sintz > Subject: RE: [zope] sudden ZClass breakage > > On Fri, 10 Nov 2000, James Sintz wrote: > > > Did you ever figure out how to fix your ZClass problem? I have a > application > > I have been working on and and all of a sudden today I start getting the > same error message "Invalid Date-Time String" . The odd thing is that it is > only broken when I try and > > add an instance from my custom add form. When I use the management > screen to > > add the instance my goLiveDate field works just fine. > > I've never gotten an answer. I figured I would work on other things and > wait > for 2.2.3 and see if that made any difference. If it doesn't, I'll make > some > more noise or dig in deeper and try to figure out what's going on. :-( > > -Tim > > Hi everyone, I've been working away on a ZClass-based > product that will provide a searchable job board for > our Human Resources Dept. here at school. Things were > going along fine until, it seemed, out of the blue I > started getting an error message about an "Invalid > Date-Time String" and a lengthy traceback. I'm wondering > if anyone can glean anything from the traceback. Is > this one of those obvious errors that I'm just > missing? I'm really puzzled. Any advice would be > appreciated. > > -Tim

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RE: [Zope] calendar help (newbie)
by James Sintz 10 Nov '00

10 Nov '00

Yes and I have read it (several times). What I am stuck on now is only showing newsletters prior to or equal to today's date. Here is what I have so far and it works (except for the not showing newsletters past today part). <dtml-calendar> <dtml-call "setCalendar('valign','top')"> <dtml-let d="date.Date()" hasdate="hasProperty(d)" prop="getProperty(d)" news="SiteSearch.searchResults(meta_type='newsLet', goLiveDate=date)"> <dtml-if news> <dtml-let path="SiteSearch.getpath(news[0].data_record_id_)"> <a href="&dtml-path;/nl_archive"><dtml-var "date.dd()"><br><dtml-var "news[0].nl_subject"></a> </dtml-let> <dtml-else> <dtml-var "date.dd()"> </dtml-if> <br> <dtml-if "hasdate==1"> <dtml-var dprop> </dtml-if> </dtml-let> </dtml-calendar> -Jamey > -----Original Message----- > From: Dieter Maurer [SMTP:dieter@handshake.de] > Sent: Thursday, November 09, 2000 3:17 PM > To: James Sintz > Subject: Re: [Zope] calendar help (newbie) > > You know about the CalenderTag HowTo? > > > Dieter

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Re: [Zope] why DTML confusing
by Charlie Wilkinson 10 Nov '00

10 Nov '00

First Simon, thanks for your message. Yours is one of the most articulate explanations I've seen on this topic. Simon Michael simon(a)joyful.com writes: > Irene Barg <ibarg(a)as.arizona.edu> writes: > [examples of DMTL confusion...] > > It is confusing. There are two systems of syntax in use here - DTML's > and python's. Once you start using "" expressions, you have left DTML > and you are in the python world. ...or "the python world with some Zope limitations placed on it." There's a third world of course, HTML. Most of us probably have that down solid, so we tend not to think of it in the context of "skills needed to master Zope." But whether it's wrapping data in an HTML table, or how to create dynamic CGI forms, mastering the integration of HTML and DTML is a critical skill that some apparently find difficult. (I've seen HOWTO's for it...) > - unfortunate reality #1: you have to use "" expressions to do any > kind of comparison, so you are pretty much forced into dealing with > these two worlds right from the beginning. That's fine, but in the interests of good will and sanity, Zope should probably have a big fat warning label saying "DO NOT VENTURE HERE IF YOU DO NOT ALREADY KNOW, OR PLAN TO LEARN PYTHON." I did know Zope was written in Python. I did not expect that I would have to learn it. Maybe that was stupid on my part, but that's what I thought. > Still, entering the python world would normally be a good thing, since > syntax there is simple and consistent. But, > > - unfortunate reality #2: certain legacy zope variables contain "-" in > their name. In the python world, this is illegal (or rather it means > something different) and so you are forced to remember constructs like > _['sequence-index'] all the time. > > It might be that fixing one or both of the above would reduce the DTML > pain factor quite a bit. Certainly, it's time to do whatever it takes > to banish these "-"-named variables, IMHO. Yes, it would help a lot. _[] is about as non-intuitive as you can get, especially after mixing in all the single and double quotes. Sure, if you understand python and how DTML wraps around it, it all makes sense, but that's a pretty narrow market and DMTL simply doesn't need to be that obfuscated. If the intended market is simply "people who grok Python", then there's really no point in something as Point n' Click n' GUI as Zope is. I certainly don't have all the answers, but it seems a simple matter to allow both sequence-index *and* sequence_index - i.e., create underscore equivalents alongside all the legacy "hyphen" variables. If I recall, I've even seen some user-contributed patches on this list to do just that. That's just one example of something in Zope that's "too difficult" screaming for change. But one of the practical advantages of making that kind of change is that the people who contribute their valuable time to help the newbies (and not-so-newbies) on this list won't spend quite so much time saying Try this: <dtml-in "AUTHENTICATED_USER.getRoles()"> <dtml-if "_['sequence-item'] == 'Admin'"> <dtml-call "REQUEST.set('edit_ok','y')"> </dtml-if> </dtml-in> That's an awful lot of weird syntax glue just to walk a list and set a value based on values in the list. If someone asked how to do that on a Perl mailing list, they'd be RTFM'ed and run out of town. Maybe that's not an entirely fair comparison, but still, how much of that syntax nightmare might be avoidable? I really don't know enough to say. Obviously *everything* has to be wrapped in something that at least distinguishes DTML from HTML. How quickly or deeply (or just *how*) one should get into python after that is another matter. Zope reminds me of NT in some ways (except that I *like* Zope). Zope, like NT, presents this illusion of friendly, easy learning curve, straight-forward "get the job done and move on" philosophy. At least that was my first impression. Then reality struck and I'm still recovering! What keeps me working with Zope is not so much what Zope is, but the promise of what it can be. (And the hope that when I'm finally a Python ace and understand the Zope source code from nose to tail, I'll be ready to work in DTML ;-) -cw- -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Charlie Wilkinson - cwilkins(a)boinklabs.com - N3HAZ Parental Unit, UNIX Admin, Homebrewer, Cat Lover, Spam Fighter, HAM, SWLer... Visit the Radio For Peace International Website: http://www.rfpi.org/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ CLOBBER INTERNET SPAM: See!! <http://spam.abuse.net/> Join!! <http://www.cauce.org/> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ QOTD: "Bush is a big corporation disguised as a human being running for president." -- Ralph Nader on David Letterman (9/28/00)

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querying status in zsql
by Paul Zwarts 10 Nov '00

10 Nov '00

Hi Zopers, I have a processing script that takes emails and puts them into a table. I bring up a table for confirmation and then submit the whole thing by a iterative item:records zsql method. My problem is that the table requires a unique primary key and quite regularly there duplicates. So ofcourse it falls over with the expected error. I have tried in the zsql method encapsulating the sql with a <dtml-if "checkforexistantrecord"> and then at the bottom of the zsql loop I commit so make sure the second time around, the data is checked. This does not seem to work. So what im left with wondering is, if I can query in the zsql method: if error, then exit or go somewhere else Is this possible? sorry to be very vague. The conundrum is the fact that the zsql method it an item loop in its own, so i cannot seem to use an if statement because it doesnt iterate by the normal <dtml-in> route.... Any advice? TIA, -- Paz Oratrix Development BV http://www.oratrix.com GRiNS SMIL Editor -

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RE: [Zope] Generating text/csv from DTML method, Mime Type?
by Farrell, Troy 10 Nov '00

10 Nov '00

I telneted into the link I gave below and here is the RESPONSE: HTTP/1.0 200 OK Date: Fri, 10 Nov 2000 19:26:52 GMT Cache-Control: private Connection: close Content-Type: application/octet-stream Set-Cookie: B=48be9l0t0oivt&b=2; expires=Thu, 15 Apr 2010 20:00:00 GMT; path=/; domain=.yahoo.com "WCG",15.625,"11/10/2000","1:57PM",-1.8125,17.375,17.375,15.625,671100 So you can see that they are using the MIME type of application/octet-stream. They also set a cookie. I hate cookies. Troy -----Original Message----- From: Oliver Bleutgen [mailto:myzope@gmx.net] Sent: Friday, November 10, 2000 12:37 PM To: zope(a)zope.org Subject: RE: [Zope] Generating text/csv from DTML method, Mime Type? > I know this sounds silly, but try making the url end with .csv > I wrote a perl cgi script some time ago that spit out a csv file. When it > ended with .csv, IE seemed to ignore the server's Content-type: text/html > header. > http://finance.yahoo.com/q?s=WCG&d=v1 > Look, my stock is falling! Actually, if you look at the link below and to > the right of the table, you'll see a download spreadsheet link. Yahoo > uses > a &e=.csv to set the extension. Presumably, the e value is for extension. That isn't silly, it corresponds exactly with the description you can find at http://msdn.microsoft.com/workshop/networking/moniker/overview/appendix_a.as p There term silly seems much more suitable for that, btw. Btw., it shows that changing the extension to .csv won't help until one has registered an application for .csv-files in windows. And in fact, the "spreadsheet"-link showed up in my IE, no download window came up... cheers, oliver

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direct login after signup?
by Philipp Dunkel 10 Nov '00

10 Nov '00

Hi zopers, Is there a syntax to login a user in python? i use a python method to add a user to the acl_user folder. When this is done I want to log in the new user directly. Is that possible? TIA Philipp Dunkel

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bad expression evaluation
by seb bacon 10 Nov '00

10 Nov '00

I'm trying to compare two page titles, using this code: <dtml-call "REQUEST.set('my_title',get_page_title)"> <dtml-in "PARENTS[1].objectValues(['Folder'])"> &dtml-my_title; : &dtml-get_page_title <dtml-if "my_title!=get_page_title"> <dtml-var title_or_id> </dtml-if> </dtml-in> Now I can see on the page that my_title and get_page_title are the same. I have also tried comparing _.str(my_title) and _.str(get_page_title) just to make sure I was comparing strings. But the if clause always evaluates true. Any ideas? cheers, seb.

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