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Re: [Zope] Zope and Polymorphism
by Ingo Assenmacher 08 Feb '00

08 Feb '00

Hi (again) Steve, > How about something like.... : > > <dtml-in objectValues> > <dtml-if "_.hasattr(_['sequence-item'],'isAnObjectManager')"> > > blah blah blah... > > </dtml-if> > </dtml-in> > Thanks, I will look after that one! (Although it is not *really* what I was looking ofr actually). I think it would be kind of helpful to declare enumerations and output for the base-class only (with something like <dtml-call "this().render"> and an overloaded render-method for the current object). Ok, you can of course do some tricks to get this (something like declaring folder-properties ['Folder','upload folder'] and than look local to the folder object in which you do enumerate, BUT that is simply not very nice since in forces the admin to set those properies every time you simply whish to enumerate some objects and it is, of course, a source for stupid bugs. Thanks for your help!! :)) Regards, Ingo.

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Re: [Zope] strange line in BaseRequest.py
by Ingo Assenmacher 08 Feb '00

08 Feb '00

Hi Steve, > I'm not sure if you're going to like the answer.. but > I think it should work if you: > > define the user at the root level with *no roles*. > > In the folder where they have privs.. give them local roles > that allow them to do their business... > This is what I finally did... it works, ok. The thing which I do not like very much about it is that whenever you assign multiple roles to multiple uer-objects on many levels of the tree, you easily loose track about who has which access-rights and who does not... This is not the case right now... but you never know. Maybe it is anyhow the best to note most of thoses things on a piece of paper ;) Thanks for your help regards, Ingo.

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help with Sorting concepts.....
by Steve Spicklemire 08 Feb '00

08 Feb '00

Hi Folks, I've been working on lots of different things... and every now and then I see that someone is getting frustrated with sorting this or that in Zope... Zieve: "http://www.zope.org/Members/sspickle/Zieve" is supposed to end all that frustration.. but alas I've had no time to make it perfect. It currenly uses a cookie to keep track of the users sorting preference. (The idea is that the *user* knows how the list should be sorted, not the developer.... ;-> ) Anyway.... I haven't been able to come up with any simple way to do this *without* a cookie. (Sessions perhaps? I dunno... should I make this depend on some other session technology?) Anyway.. I'm mostly just fishing for ideas about how to make this thing more useful. Martijn P. at one point suggested that it be a tag... but I think I need some more direction with that idea... How would making it a tag help get rid of the cookie? Or is it that there would be a different cookie for each tag? Anyway comments welcome as usual.... -steve

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strange line in BaseRequest.py
by Ingo Assenmacher 08 Feb '00

08 Feb '00

Hi! I am using Zope 2.1.2/Linux ix86. Now there is a line in $PYTHONDIR/lib/python/ZPublisher/BaseRequest.py which does riddle me: if user is None and roles != UNSPECIFIED_ROLES: response.unauthorized() (line 441/442). I ran into this one because I set up one folder to be an internal uploading folder which should generally not be accessible from anonymous users. So I added users to the acl_user folder, gave them a write_role and set up permissions correctly. Everything worked so far. The write_role was globally declared within the root-folder, the users were declared locally within the folder which was designed to be used for uploads (not above). I entered the (anonymously viewable) site and changed to the private folder; I was asked for uname and pwd and got access to the private folder. Ok. But then I wanted to go to the public area again... which raised the "unauthorised" response at the above lines. I figured that declaring the users on the level of the anonymously viewable pages and passing the write_role to these users locally within the upload folder settled my problem, since they were not "None" anymore within traverse. BUT: are these lines no mistake? How can a user which is None have roles? The manual states that any user implicitly has the "anonymous role"... which he has not, according to the lines above. (Please: I did NOT study traverse() very hard, so please excuse this, maybe, dumb question). Regards, Ingo ------------------------------------------

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Zope and Polymorphism
by Ingo Assenmacher 08 Feb '00

08 Feb '00

Hi! Since Zope is based on an OO-DB and you can add and edit objects in an intuitive manner, there is a question which does I simply can not figure out: You can inherit methods and attributes from other objects (even multiplie inheritance), but do these objects behave like their parents in respect to identification? To illustrate my problem: UploadFolder inherits Folder <dtml-in "objectValues(['Folder'])"> [...] </dtml-in> Imagine I have several Folders together with some UploadFolders in one Folder container. The above code would simply enumerate over "real" Folders, would it not? There are two questions: * maybe "objectValues" is the wrong method... which one does it? * do I have to know the class name *explicitly*? (this would force me to rewrite enumerations of object every time I create new classes) Thanks for the advices. Regards, Ingo. ------------------------------------------

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Parse
by Pedro Silva 08 Feb '00

08 Feb '00

Hi, I'm wondering how can I parse a file, to look for some specific information. If anyone could tell me, please send me a mail to: psilva(a)ruido-visual.pt. This is really important amd I have some urgency. Thanks, Pedro (Portugal)

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DTML Container?
by Mike 08 Feb '00

08 Feb '00

Hello, I wondered what is the simples (and efficient) way of implementing subj. Let I explain first what it may be needed for. Suppose we'd like to create a class modeling an article (newspaper article, for example). An article has attributes 'title' and 'body' and can contain zero or more photos. Article's body contains some HTML text exposing those photos, if any. Note the images are aggregated by article and should not be exposed anywhere else. The simplest way is to subclass our Article from (Z)ObjectManager and implement title and body as properties. On this way we are losing the DTML capabilities which we were have in DTML document/method. This is a big lost, indeed (at least we have to write <img src=img width=... height=... alt=...> instead of just <dtml-var img>). The one way to keep object DTML-aware is to subclass DTML method also. I tryed this approach and found this working, but with one exception: <dtml-var img> does not work. It does not work on _any_ callable objects. The workaround is <dtml-var "img.tag()"> or something equivalent. This is also not so good. Another approach is to render properties as DTML strings using external method: from DocumentTemplate import HTML def render_dtml (text='',mapping={},**kw) : html = HTML(text) return html(client=None,mapping=mapping) This also works fine but also has a dark side. As I found in sources, Zope stores DTML methods and documents in parsed form, this was done not just for fun, I guess. I think the parser is very expensive thing so on this way we get a great performance impact, right? Does anybody have any solution or just mention on it? Best, Mike P.S. Why nobody asked this before???

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RE: [Zope] Difference between manage_addProperty on a DTMLDocumen t and on a Folder
by Benillouche, Michael 08 Feb '00

08 Feb '00

Hi Tres, Thanks for your answer, I did what you say : <dtml-call "REQUEST.set('compteur_login', _.str(compteur) )"> <dtml-call "manage_addDTMLDocument(id=compteur_login)"> <dtml-with compteur_login> <dtml-call "manage_addProperty('type', 'FC', 'string')"> </dtml-with> but only the document is created ; the property is NOT added . It looks bizzare, Any other thoughts ? Michael -----Message d'origine----- De: Tres Seaver [mailto:tseaver@palladion.com] Date: lundi 7 février 2000 23:41 À: Benillouche, Michael Cc: zope(a)zope.org Objet: Re: [Zope] Difference between manage_addProperty on a DTMLDocument and on a Folder "Benillouche, Michael" <Michael.Benillouche(a)france.acnielsen.com> > I have the following problem : > > When I execute this code : > > <dtml-call "REQUEST.set('compteur_login', _.str(compteur) )"> > <dtml-call "manage_addFolder(id=compteur_login)"> > <dtml-call "_[compteur_login].manage_addProperty('type', 'FC', 'string')"> > > The Folder is created with the property 'type' > > But when I execute this code : > > <dtml-call "REQUEST.set('compteur_login', _.str(compteur) )"> > <dtml-call "manage_addDTMLDocument(id=compteur_login)"> > <dtml-call "_[compteur_login].manage_addProperty('type', 'FC', 'string')"> > > I have the following error : > > Error Type: AttributeError > Error Value: 'string' object has no attribute 'manage_addProperty' > > It seems that manage_addProperty doesn't behave the same way on a Folder and > a DTMLDocument . > Any solution to make it work ? > Thanks a lot. The "_[compteur_login]" is causing the document to be rendered, I think. Try:: <dtml-with compteur_login> <dtml-call "manage_addProperty('type', 'FC', 'string')"> </dtml-with> -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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FAQ product needed for Zope.org?
by Darran Edmundson 08 Feb '00

08 Feb '00

I have a suggestion: why not kill the "Tip" on Zope.org and reincarnate it as a "FAQ"? Optionally, if someone was motivated, it would be nice to add a selectable subject area (DTML, SQL, Installation, etc.) useful in pruning searches and some mechanism (moderation?) for ensuring that submitted FAQ's are worthy of inclusion in the database. My feeling is that such a product implemented on Zope.org would expand in content rapidly. It would reduce FAQs to the mailing list and really help relative newbies like myself to solve ... well, FAQs. Such a product would complement the How-To documents nicely. Comments? Cheers, Darran.

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Running Zope on an Apache 1.26 Virtual Host?
by Pat McCarthy 08 Feb '00

08 Feb '00

Hi All, I'm interested in running Zope on a virtual host running Apache 1.26 and I was wondering if this is possible, and how I should go about installing it? I did some searching through archives, and saw a few "how-to" articles, but most of them looked like they were dealing with installing Zope on Apache 1.39 in a non-virtual environment. I believe I need to use FastCGI or PCGI? But I was wondering if there was a how-to about this topic, or anyone else out there who has successfully run Zope in an environment such as this. Thanks. Pat McCarthy pat(a)wakeboarder.com (541) 344-4032

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