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Volatile Properties in ZClasses?
by Tom Schwaller 02 Nov '99

02 Nov '99

Hi, Take a look at the BannerAd ZClass: (http://www.zope.org/Members/lalo/BannerFolder) Updating the "hits"-property when the banner is loaded, has the effect, that the Banner-Object is backuped by the Zope magic, which is quite annyoing when having a high-traffic site. So, how can one generate volatile properties, which do not get backuped (I tried it whith _hits, but ZClasses do not likte them ;-) --> Zope Error). Is there a reason for not allowing _Variables in ZClasses and how does one solve the Problem in this case (seems like a generael problem) -- Tom Schwaller http://www.linux-magazin.de

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KnowledgeKit HowTo?
by Bruce Elrick 02 Nov '99

02 Nov '99

(this is a re-send of an earlier message I sent to Bill and zope.(a)zope.org. Strangely enough, zope.org's mailserver did not like the extra '.' ;-) ) I'm wading into using the KnowledgeKit product and have some questions. First of all, though, thank you to Bill for creating it. Second, let me state that I briefly went through the Zclass tutorial but don't understand all the pieces (factories, etc.). I installed the product as well as the example. I created my own KB and successfully added two sub-FAQs. I also made the following simple change. In the KnowledgeKit area in the Products page I renamed the index_html DTMLmethods that were in KBase, KBEntry, FAQBase, FAQEntry to the name "body" and removed the standard_html_header/footer for the method. The rest of my Zope site acquires index_html from the root folder (except in exceptional circumstances) and that DTMLmethod acquires "body" from wherever it is being viewed. This works like a charm and the KBase and entries have the look and feel of my site. My standard_html_header/footer do not have all the stuff to create the look of my site, which is when I made this change. Included in my index_html is some navigation code (actually, I'm current using the breadcrumb code). My questions are numerous, but I'll only ask a few here. With respect to this product, how is one expected to add entries? I know I can pop into the manage page and then I have the usual Zope page for adding objects. In fact, my navigation code in my index_html uses: <dtml-if "AUTHENTICATED_USER.has_permission('Edit', this())"> <a href="manage_main">Edit page</a> </dtml-if> which gives me something to click on to get there. However, I have two problems with this. One is the look of the Zope management screen is glaringly different from the rest of the site and allows (gives one the opportunity?) one to add other things besides KBEntries (or FAQEntries where appropriate). The other problem I have is that when I'm in a FAQBase the above code does not give me an edit button (in a KBase it does). I'd like to modify the KBase's and FAQBase's 'body' (was index_html) to include something that a use can click on to add an new item. In fact, I'm wondering why there isn't something there already. When you install the example KBase, it seems strange that there are these sample entries but then no way to add more! Looking at the html-source for the Zope management screen gives me this code: <FORM ACTION="http://fred/Zope/SKB/" METHOD="GET"> <SELECT NAME=":method" ONCHANGE="location.href=this.options[this.selectedIndex].value"> <OPTION value="manage_workspace" DISABLED>Available Objects <OPTION value="manage_addCookieCutterForm">CookieCutter <OPTION value="manage_addProduct/OFSP/documentAdd">DTML Document <OPTION value="manage_addProduct/OFSP/methodAdd">DTML Method <OPTION value="manage_addProduct/KnowledgeKit/FAQBase_factory">FAQ Base <OPTION value="manage_addProduct/KnowledgeKit/KBase_factory">Knowledge Base <OPTION value="manage_addProduct/KnowledgeKit/KBEntry_factory">Knowledge Base Entry <OPTION value="manage_startWizard">P SQL Input Wizard <OPTION value="manage_addTinyTableForm">TinyTable <OPTION value="manage_addProduct/ZSQLMethods/searchAdd">Z Search Interface </SELECT> <NOSCRIPT><INPUT TYPE="SUBMIT" VALUE=" Add "></NOSCRIPT> </FORM> from which I could cut: <FORM ACTION="<dtml-var URL0>" METHOD="GET"> <SELECT NAME=":method" ONCHANGE="location.href=this.options[this.selectedIndex].value"> <OPTION value="manage_addProduct/KnowledgeKit/KBEntry_factory">Knowledge Base Entry <NOSCRIPT><INPUT TYPE="SUBMIT" VALUE=" Add "></NOSCRIPT> </FORM> And paste it into the KBase's "body" DTMLmethod (was index_html) and similarly for FAQBase. Does this seem reasonable? Is there better HTML than the above to accomplish this? Am I completely missing the boat on how one would use this product? :-) Thanks in advance for any help... Cheers... Bruce P.S. Thanks, Bill, for making this an exported product so that we can look at it and learn.... -- Bruce Elrick, Ph.D. Saltus Technology Consulting Group Personal: belrick(a)home.com IBM Certified Specialist Business: belrick(a)saltus.ab.ca ADSM, AIX Support, RS/6000 SP, HACMP

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Info on Zope and Databases
by Ian Willis 02 Nov '99

02 Nov '99

I having a bit of a look at zope and database connectivity. One thing that I'm not sure about is if I have two platforms. An Oracle database, and a web server. Does the ZOracle module need access to oracle libs ie does oracle have to be installed on the web platform. Another thing is there any interest in a ZODBC module for Unix ( I don't think that there is one ). Just a wish of mine.

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Re: [Zope] Renderable Base ZClass
by Kevin Howe 02 Nov '99

02 Nov '99

Woohoo! It works! Thanks a bunch, now to incorporate it into the ZClass interface..... KH -----Original Message----- From: Brian Lloyd <Brian(a)digicool.com> To: 'Kevin Howe' <ap619(a)chebucto.ns.ca>; Brian Lloyd <Brian(a)digicool.com>; alex(a)mop.no <alex(a)mop.no> Cc: zope(a)zope.org <zope(a)zope.org> Date: November 2, 1999 5:46 PM Subject: RE: [Zope] Renderable Base ZClass >> This solves the REQUEST problem, but an error then occurs >> with the DTML >>  tag, which is the next tag down in the DTML method. >> >> How can I enable DTML tag parsing, for "in", "with", and >> other tags tags? >> Is it just a matter of passing the right arguments? >> >> The script and the error traceback are included below. >> >> Cheers >> Kevin >> >> >> SCRIPT >> -------------------------------------- >> import Acquisition >> >> class Renderable: >> def __str__(self): >> theRequest=self.REQUEST >> if theRequest: >> theObject = getattr(self, 'render') >> return theObject(theRequest) >> else: >> return "no request" > > >I believe you just need to tweak the way that you are calling >theObject - I'm assuming its a DTML method/document. try: > >def __str__(self): > theRequest=self.REQUEST > if theRequest: > theObject = getattr(self, 'render') > # When calling a dtml method/document, you pass the > # 'client' of the method, followed by a mapping of > # values (usually the REQUEST)... > return theObject(self, theRequest) > else: > return "no request" > > >Let me know if this fixes it. > > >Brian Lloyd brian(a)digicool.com >Software Engineer 540.371.6909 >Digital Creations http://www.digicool.com > > >

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Acquiring root index_html method in lower level folder
by Milt Martin 02 Nov '99

02 Nov '99

>From a Zope newbie... Given: "root" folder index_html method which refers to menu_bar and body_content menu_bar method body_content method "about" folder body_content method Trying to browse root/about folder directly and expecting 1. inherited index_html method to be displayed and it does 2. which refers to menu_bar method and it is displayed but... I expected body_content method in "about" folder but instead it displayed body_content in root folder? I copied index_html method into the about folder then it worked ok. I considered factoring out the body_content from root and placing in a lower lever "home" folder, but how do you handle browsing the root folder which no longer contains the body_content to default to the home folder body_content if not being called from lower level folder (such as abot or home)? Thanks.

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REQUEST is too crowded
by Itamar Shtull-Trauring 02 Nov '99

02 Nov '99

I'm refering to a ZCatalog using a variable zcatalog which contains the name of the Zcatalog: <dtml-in "_.getitem(zcatalog, 1)"> <dtml-call "REQUEST.set('newurl', '/' + getpath(data_record_id_))"> </dtml-in> So I need to pass the search parameters via REQUEST. Unfortanutely, REQUEST already has all kinds of variables set in it because this is a rather involved procedure, and these variables may affect the search results. I need to pass the search terms to the Zcatalog somehow, or make a empty REQUEST variable - any ideas how? I can only call the Zcatalog using _.geitem or the like. -- Itamar - itamars(a)ibm.net

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RE: [Zope] Renderable Base ZClass
by Brian Lloyd 02 Nov '99

02 Nov '99

> This solves the REQUEST problem, but an error then occurs > with the DTML >  tag, which is the next tag down in the DTML method. > > How can I enable DTML tag parsing, for "in", "with", and > other tags tags? > Is it just a matter of passing the right arguments? > > The script and the error traceback are included below. > > Cheers > Kevin > > > SCRIPT > -------------------------------------- > import Acquisition > > class Renderable: > def __str__(self): > theRequest=self.REQUEST > if theRequest: > theObject = getattr(self, 'render') > return theObject(theRequest) > else: > return "no request" I believe you just need to tweak the way that you are calling theObject - I'm assuming its a DTML method/document. try: def __str__(self): theRequest=self.REQUEST if theRequest: theObject = getattr(self, 'render') # When calling a dtml method/document, you pass the # 'client' of the method, followed by a mapping of # values (usually the REQUEST)... return theObject(self, theRequest) else: return "no request" Let me know if this fixes it. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Re: [Zope] Great How-To on using ZSQL methods from an External method
by David C. Morrill 02 Nov '99

02 Nov '99

> I went looking for the How-to, but couldn't find it (even via the search > interface). Could you pass me a link? http://www.zope.org/Members/jpenny/Accessing_a_ZSQL_Method_from_an_External_ Method >From the main page at www.zope.org I clicked on "Documentation" (on the left side or top nav bar), then on the "How-To's" link about half-way down the page. That takes you to a multi-page list of all the How-Tos that have been contributed. HTH... Dave Morrill

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RE: [Zope] Great How-To on using ZSQL methods from an External me thod
by Jeffrey Shell 02 Nov '99

02 Nov '99

> I'm still fairly new to Python, but the only part of your > How-To that, IMHO, > might be written a little more simply is the code fragment in > the "What is > res?" section: > > fields2index={} > fieldnames=res._schema.items() > for i in range(len(fieldnames)): > fields2index[fieldnames[i][0]]=fieldnames[i][1] > > which might read more clearly as: > > fields2index = {} > for name, index in res._schema.items(): > fields2index[ name ] = index > Don't forget that you can call a field directly by both getitem and getattr: res=someSqlMethod(name='bob', relation='uncle') for r in res: #loop through the result set, r is a Record object if r.age < 12: #do something for young uncles here else: #do something else for everyone older. AGE is a column in the results set. There's a lot of meta-data in Record objects that can generally be avoided in common programming.

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Re: [Zope] Renderable Base ZClass
by Kevin Howe 02 Nov '99

02 Nov '99

This solves the REQUEST problem, but an error then occurs with the DTML  tag, which is the next tag down in the DTML method. How can I enable DTML tag parsing, for "in", "with", and other tags tags? Is it just a matter of passing the right arguments? The script and the error traceback are included below. Cheers Kevin SCRIPT -------------------------------------- import Acquisition class Renderable: def __str__(self): theRequest=self.REQUEST if theRequest: theObject = getattr(self, 'render') return theObject(theRequest) else: return "no request" TRACEBACK -------------------------------------- Error Type: KeyError Traceback (innermost last): File C:\Programs\Internet\kevin\kevin\lib\python\ZPublisher\Publish.py, line 214, in publish_module File C:\Programs\Internet\kevin\kevin\lib\python\ZPublisher\Publish.py, line 179, in publish File C:\Programs\Internet\kevin\kevin\lib\python\Zope\__init__.py, line 201, in zpublisher_exception_hook (Object: ElementWithAttributes) File C:\Programs\Internet\kevin\kevin\lib\python\ZPublisher\Publish.py, line 165, in publish File C:\Programs\Internet\kevin\kevin\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: test) File C:\Programs\Internet\kevin\kevin\lib\python\ZPublisher\Publish.py, line 102, in call_object (Object: test) File C:\Programs\Internet\kevin\kevin\lib\python\OFS\DTMLMethod.py, line 145, in __call__ (Object: test) File C:\Programs\Internet\kevin\kevin\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: test) File C:\Programs\Internet\kevin\kevin\lib\python\Products\Renderable\Renderable.p y, line 16, in __str__ (Object: Renderable) File C:\Programs\Internet\kevin\kevin\lib\python\OFS\DTMLMethod.py, line 145, in __call__ (Object: render) File C:\Programs\Internet\kevin\kevin\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: render) File C:\Programs\Internet\kevin\kevin\lib\python\DocumentTemplate\DT_In.py, line 630, in renderwob (Object: activeURLs) KeyError: (see above) -----Original Message----- From: Brian Lloyd <Brian(a)digicool.com> To: 'alex(a)mop.no' <alex(a)mop.no>; 'ap619(a)chebucto.ns.ca' <ap619(a)chebucto.ns.ca> Cc: 'zope(a)zope.org' <zope(a)zope.org> Date: November 2, 1999 11:25 AM Subject: RE: [Zope] Renderable Base ZClass > >> >If there is no way to pass REQUEST to __str__(), I believe this is a >> >minor shortcoming and should be remedied in the Zope DTML >> core. Such as >> >by testing for the presence of an alternative method called >> >__render__(), for example, and using that instead. > >While it is not passed explicitly, remember that REQUEST >can almost always be accessed through acquisition: > >def __str__(self): > theRequest=self.REQUEST > ... > return theResult > > >> Below is a forward of a discussion about the Renderable Base >> ZClass Product >> and how it could be integrated into the ZOPE Core. >> >> I'd like to see it incorporated into ZClasses - Under the >> "Basic" tab of the >> ZClass, having a selectlist labelled "Render Method" from >> which you'd choose >> the DTML method to be be displayed when the object is called >> as . >> >> Can anyone offer suggestions or comments as to a better way >> to accomplish >> this? > >After reading this, I'm not sure I understand what the core >problem is - is it that the REQUEST was not available as an >explicit argument, or am I missing something deeper here? > > > >Brian Lloyd brian(a)digicool.com >Software Engineer 540.371.6909 >Digital Creations http://www.digicool.com > > >

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