June 2002 - Zope - Zope lists

Call DTML from TAL
by Oliver Marx 05 Jun '02

05 Jun '02

Hi I'm experimenting a bit with Zope. Can one call fx the NFGnav from a template (ZPT)? If yes how? Thx for your time. \Olvier --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com) Version: 6.0.368 / Virus Database: 204 - Release Date: 29-05-2002

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Pickle and python scripts...
by Oliver Pabst 05 Jun '02

05 Jun '02

hi Zopers... how can I use Pickle.dumps in a python script ? -- --- --- Oliver Pabst .-------------------------. mailto:olpa@sybcom.de : : phone :+49 681 56600600 : project department : SYBCOM GmbH fax :+49 681 56600660 : : http://www.sybcom.de

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CatalogAware PropertyManager
by Garikoitz Araolaza 05 Jun '02

05 Jun '02

Hi! I wrote a custom CatalogAware object class inheriting from PropertyManager. I'm managing the properties with the regular PropertyManager form (manage_propertiesForm) but I'd like the propertymanager to call reindex_object() each time I modify something. I suppose that the quick'n dirty solution is adding reindex_object() at the end of the manage_editProperties method. But I don't know if there is a cleaner solution or if it will badly affect the rest of objects using PropertyManager... Any hint? Thanks Gari

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RE: [Zope] XML in Zope
by sean.upton＠uniontrib.com 05 Jun '02

05 Jun '02

I would think ParsedXML+DOM in Python Scripts+DTML/ZPT would work here??? Contrary to popular belief, I don't think ParsedXML is "dead" - it works quite fine, thank you, for all the DOM L2 stuff I do, which is likely why there hasn't been a lot of development... and I've seen that Martijn Faassen has been doing some small improvements in CVS in the last few days. All this assumes small documents like forms and news-articles, not book-sized docs, since nodes in a ParsedXML doc are not manageable, so each edit reqires the whole DOM from the document object downward... I've used this type of setup for interactive form applications as well as XML-stored content applications and been quite happy, but I've been doing a lot of DOM-in-python-scripts coding; it is a bit tedious to code for, there is a lot of recursion to think about, etc.... but once you get it right, it just works... Alternately, I think you could put any Python XSLT on top of this with a few external methods, though I think it's a bit hackish since you would be printing XML, outputting it to a string, and having it parsed again (but, hey, if it works...) - as long as you are not indexing the results of XSLT in a Catalog index for a bunch of docs! As an aside, it sounds like you need to make a lot of revisions to your documents, and if you store them in the ODB it might create bloat in a versioned ODB unless you pack frequently. A brief thought for you: create something that will do application-level versioning and use non-undo mounted storage for a repository for your documents... Consider creating a folderish type whose instances contain a few specialized objects: one is a ParsedXML DOM object that contains the current XML for your document; your folderish base object could optionally be coded to act as a proxy to this contained DOM. Also, create a simple type that contains previous revisions of the XML as string-based properties, rather than storing a full DOM for each revision. Alternately, use compression methods to compress these archived revisions XML and use file objects containing the compressed text. Then, keep track of things with a state table of some kind. The downside to this is that you would have overhead in converting XML to DOM every time you loaded up a previous revision, but from a storage perspective, this should work quite well. A caveat: I haven't done exactly this before, but, after serious thought, this is the approach I plan to take with a project I am starting work on for XML-based content types in our content management system, and my hunch is that this will work quite well. Cheers, Sean -----Original Message----- From: Dan Shafer [mailto:pydan@danshafer.com] Sent: Wednesday, May 15, 2002 9:45 AM To: Chris Withers Cc: Dan Shafer; zope(a)zope.org Subject: Re: [Zope] XML in Zope OK, I'll be happy to describe the problem. I'll try to be brief but clear. In the briefest terms I can come up with: I need a way of storing a document-like object in the ZODB which will be sufficiently structured to allow the selective display and replacement of its elements while allowing for the immediate display of its contents as a nicely formatted document in a browser. Now for the longer-winded version for those with the patience or curiosity to read more. I am building an application which is quite document-centric. When the client interacts with the application, he is building a "record" of an interaction with a patient. This interaction can extend over a period of days, so it needs to be able to be resumed. The application now consists entirely of HTML forms which trigger Python scripts that initially create and then update a DTML Method object. I embed formatting into the DTML Method so that when the user wants to see a report of the patient interaction, all I have to do is give him a way to view the document. The client *loves* the application as it has developed so far, in part because as the code updates the DTML Method during the patient interaction, a supervising clinician can see the progress of the interaction as it develops. So I prefer not to lose the ability to allow the supervisor to see the document the code is generating, but I may have to do so. When the interaction with the patient proceeds linearly and in one session - which is most often the case - this system works like a charm. But if for any reason the interaction gets interrupted, my scripts, which always merely *append* information to the end of the document as each step proceeds, are not now capable of a smooth resumption in place. This would require, e.g., that information now stored in the DTML Method be parsed out to supply initial values to fields on the interactive form that have already been completed. That is the minimum I need, but as I have been thinking about the design, I've decided I actually need much more than that. I believe the best way to accomplish that objective of maximum flexibility for the user is to use a more structured approach to the document. As I see it, I had three alternatives: (1) parse the text in the DTML Method to pull out and rewrite pieces as needed; (2) use properties of the DTML Method in addition to text content and link the two; (3) go to XML to take advantage of readily available Python techniques for managing the structured data while being able to use XSLT to retain the ability to show the document in process immediately on demand. I spent some time looking at the first option and decided it was going to be terribly inefficient. I would in essence have to define my own start/end tags for each element of the document (which I could use comments for) and then manually parse them. Ugly. The second approach also felt inefficient because I would be storing all of the information in a document twice, once as a document (so that it could be displayed quickly on demand) and once as properties (so they could be retrieved and replaced as needed). I have not completely discarded that approach but XML seems more promising. I am fully aware of the horrendous overhead associated with XML documents but these documents are quite small (3-4 pages on average, printed) and always identically structured. With Python's excellent XML support, I have already gotten some very good routines written to parse such documents. My problem is that when I try to translate that code to Zope External Methods, they don't work and debugging them in Zope is a nightmare. I am learning, and I am open to any suggestions or corrections to my thinking. I appreciate the group's patience with me and any ideas you have. At 09:18 AM 5/15/2002 +0100, Chris Withers wrote: >Dan Shafer wrote: > > > > I had in mind to use DTML documents as the storage mechanism for the main > > documents at the core of an application I'm building for a client, but it > > turns out they are going to need to do some things that would be pretty > > cumbersome in a DTML document or method. So I'm investigating using XML for > > these documents. > > > > Searching zope.org turns up a lot of stuff about XML but, as far as I can > > tell, only one product: XMLDocument. But it describes itself as out of date > > and replaced by ParsedXML, which, as far as I can tell, hasn't had a > > product release yet. > > > > I can't tell from the ZQR which XML implementation it is documenting. > >XMLDocument is out of date. >The ZQR is no longer maintained. >ParsedXML is dead as it currently has no maintainer (well, bar Martijn, >who's busy on the >Zope 3 effort and not subscribed to this list...) > >To be honest, if you explained the problem we might be able to suggest an >alternate >solution... > >cheers, > >Chris - XML: the world's most inefficient data transfer format _______________________________________________ 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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Make Navigation
by Jaroslav Lukesh 05 Jun '02

05 Jun '02

Hi, I want to make navigation DTML methods for: But I have these problems: * child level - it works even in folder that does not have own index_html method inside: ------------ <dtml-in "PARENTS[0].objectValues(['Folder'])" sort=title> <a href="<dtml-var URL1>/<dtml-var id>"><dtml-var title_or_id></a><br> </dtml-in> And what for thats ? * parent level (list of all objects at above level of hierarchy) * top level of web --------------- <dtml-in "PARENTS[-1].objectValues(['Folder'])" sort=title> <a href="<dtml-var URL1>/<dtml-var id>"><dtml-var title_or_id></a><br> </dtml-in> --- but this is problem, because this make list of "Root Folder" objects. I want to have list of topmost objects in first level of subdirs (alias future virtual webs). Many thanks for help. Jaroslav Lukesh, K-net ------------------------------------------------------------------------ www.k-net.cz Multimedia, Networking, Communications, terminals, NC, R+D

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Re: [Zope] Hosting of Zope solutions in DK
by Stephan Goeldi 05 Jun '02

05 Jun '02

>as they are in (almost) the same timezone same timezone: http://www.zopehosting.ch/ _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx

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RE: [Zope] personalize Home Page
by Santagostino Pretina, Luca 05 Jun '02

05 Jun '02

Hi eric thanks for your answers, but I am encountering problem in understanding it...(forgive me but I'm really new to zope..) this is your code: <dtml-with expr="CMF"> <dtml-var cmf_news> </dtml-with> I don't understand if CMF stands for the name of my cmf_site or for the path to my folder/object and in this case what is the object? I mean, suppose I have an article in a folder called myFirstArticle and this would be the path to it: cmf_site/MyNews/MyArticles/MyFirstArticle, and your code becomes something like this: <dtml-with expr="cmf_site/MyNews/MyArticles/MyFirstArticle"> <dtml-var cmf_news> </dtml-with> but then again: what is cmf_news? where do I get that variable from? thanks again and I hope you or anyone else could help me with this. thanks Luca -----Mensaje original----- De: eric.n.dunn(a)bankofamerica.com [mailto:eric.n.dunn@bankofamerica.com] Enviado el: martes, 04 de junio de 2002 14:03 Para: Santagostino Pretina, Luca CC: zope(a)zope.org Asunto: Re: [Zope] personalize Home Page This is what I use to pull the last 3 dates from my squishdot site (without stuff in parens) <dtml-with expr="squishdot_site"> (squishdot folderish/object) <dtml-var articles_html> (copied code from "squishdot/rightbox_methods/prev_articles) </dtml-with> (close tag) Same concept with my CMF site <dtml-with expr="CMF"> <dtml-var cmf_news> </dtml-with> I pull both CMF News and Squishdot News to my front page. Anyone posting to my CMF or Squishdot site will see there posting headline on the fron page. "Santagostino Pretina, Luca" <lsantagostino(a)activa3.net> on 06/04/2002 06:35:31 AM To: "'zope(a)zope.org'" <zope(a)zope.org> cc: Subject: [Zope] personalize Home Page Hi list, I am new to Zope and I am stuck with this problem: I have created folders and subfolders and I now need to retrieve the content of these subfolders and display it in the home page. Let's say I have 4 different folders, each one has 3 subfolders and each subfolder has a list of articles or news_items. How can I import the content of the last article published in a specified subfolders, in the homepage? or the last news_item published in a specified subfolder into the index_html of the homepage? thanks for helping Luca _______________________________________________ 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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DTML Doc : publishing problem
by Aseem Mohanty 05 Jun '02

05 Jun '02

Hi all, I have the following function: user_login__roles__ = None def user_login (Self, REQUEST, RESPONSE, username, password): # Create authorization variable login_goto_path = "/members" login_failure = "/failed" ac = encodestring('%s:%s' % (username, password)) auth = 'Basic %s' % ac user = Self.validate(REQUEST, auth) if user: return RESPONSE.redirect(login_goto_path) else: return RESPONSE.redirect(login_failure) and when I call it in a form in a DTML document this is the error I get: Debugging Notice Zope has encountered a problem publishing your object. The object at http://kandinsky:8080/test_folder/acl_users/user_login has an empty or missing docstring. Objects must have a docstring to be published. I have a similar function for logout : user_logout__roles__ = ['MySQLUserRole'] def user_logout (Self, REQUEST,RESPONSE): realm=RESPONSE.realm RESPONSE.expireCookie('_NBS_Login',path='/') RESPONSE.setCookie('_NBS_Logout',1,path='/') RESPONSE.setStatus(401) RESPONSE.setHeader('WWW-Authenticate', 'basic realm="%s"' % realm, 1) RESPONSE.setBody("""<html><meta http-equiv="refresh" content="0; URL=/test_folder/logged_out"> <head><title>Logout</title></head> <body><p>Logging you out.</p> </body></html>""") return which I call in a similar fashion and which works fine (logs user out and redirect because of the http-redirect). Where am I going wrong. TIA. AM -- ================================================================== Aseem Mohanty Neurobehavioral Systems Inc, 828 San Pablo Ave, Albany, CA 94706 (R) 510 7696011 (M) 510 3014871 (O) 510 5279231 ================================================================== "I saw `cout' being shifted "Hello world" times to the left and stopped right there!!" -- Steve Gonedes ==================================================================

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Detecting access rights in python
by Aseem Mohanty 05 Jun '02

05 Jun '02

Hi All, I have a simple problem. If I have a REQUEST object and would like to know if the requested resource is public or private, how can I do that in python?? TIA. AM -- ================================================================== Aseem Mohanty Neurobehavioral Systems Inc, 828 San Pablo Ave, Albany, CA 94706 (R) 510 7696011 (M) 510 3014871 (O) 510 5279231 ================================================================== "I saw `cout' being shifted "Hello world" times to the left and stopped right there!!" -- Steve Gonedes ==================================================================

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Re: Is Zope 3 for Programmers only - Learning Python
by Jan Smith 05 Jun '02

05 Jun '02

Stuart Bishop wrote: > If you find that the DTML you used to write cannot be implemented > in ZPT, you know enough about programming to go through the > Python tutorial in a day or two and be much more productive. > The time spent will more than pay itself off. *Don't* go and > buy a Python book, as most of the stuff mentioned will be > utterly useless to you unless you are writing Python products. > And don't think you have to learn the Library Reference for > the same reasons. I feel that Guido's tutorial is the quickest > and best way of getting up to speed. I don't think my grasp of DTML is all that great I just do things by trial and error until they work. I worked through several chapters of Alan Gauld's 'Learn to Program Using Python' with my 15 year old son until we both got stuck. Thanks for the suggestion about Guido's tutorial we will try that and see how we go. Many people on this list have said that DTML is not about to go away. I realise this but I have only a limited amount of free time to learn new things and would much rather put effort into something that gives a long term benefit so thanks for the suggestion. Jan Smith webmster OzZope - Australia http://www.ozzope.org

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