December 2000 - Zope

To retrieve properties from a dtml document
by Ausum 19 Dec '00

19 Dec '00

After some newbie researching I found that whenever I want to retrieve a propertie from a dtml document I must use this: <dtml-var "thedocument.thepropertie"> If thedocument is index_html or whatever_html it works fine, but how could I retrieve a propertie from a document named whatever.html? We need to use the .html extension for every document because we want to mirror the site using WGET, leaving the automation just on the production stages, in order to upload static pages to our remote server. Any comment? Ausum

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Re: [Zope-dev] Loginmanager and local roles
by Steve Spicklemire 19 Dec '00

19 Dec '00

Hi Morten, >>>>> "Morten" == Morten W Petersen <morten(a)esol.no> writes: Morten> (Can't understand why I had to use an additional list Morten> though). You probably found that Zope doesn't allow you to access the elements of a BTree object (which is what you get from "persistentItemIDs()" from dtml. You need to copy them to a 'plain' list first (a 'plain' list is in the set of object types that Zope allows you to use in DTML without further security checking.. ). -steve _______________________________________________ Zope-Dev maillist - Zope-Dev(a)zope.org http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )

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Import/Export error
by Otto Pichlhoefer 19 Dec '00

19 Dec '00

Hello, This is a question concerning the Import/Export of *.zexp files. I am new to Zope and experimented during the last month. The installation went smoothly and all the features worked smoothly. However at some point the Import stoped working. I thought there might be a conflict with one of the many products that I had installed. So I installed a completely new and clean Zope. However the problem persists. When trying to import a *.zexp file from the \Import\ directory: Zope Error Zope has encountered an error while publishing this resource. Error Type: Bad Request Error Value: File does not exist: G:\PROG_I~1\ZopeSite\import\  This is my Zope: Zope version: Zope 2.2.4 (binary release, python 1.5.2, win32-x86) Python version: 1.5.2 (#0, Jul 30 1999, 09:52:18) [MSC 32 bit (Intel)] System Platform: win32 (WinNT SP5) I would appreciate any help since I have no clue as to what the problem might be. Thanks, Otto - Otto Pichlhoefer mailto:orp@aon.at

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Re: [ZWeb] Feedback
by Martijn Pieters 19 Dec '00

19 Dec '00

Hi Martin, I moved this thread over to the Zope mailinglist; the Zope-Web mailinglist is intended for discussion related to the Zope.org website itself. You'll get more feedback on the Zope mailinglist. On Tue, Dec 19, 2000 at 05:41:34PM +0100, Edwin Martin wrote: > The last couple of months I developed a dynamic website in Zope. > > You can take a look: http://www.joods.nl/, but be warned: it's Dutch. Cool, I always like to see more Dutch websites. I never really convinced my colleagues at my previous employer about the advantages of Zope; they were/are entrenched in the Java point of view of the world. I did manage to convince my COO though, who is now starting his own Zope-driven business. You may want to tap into the Dutch Zope community as well; see http://zll.zopatista.com:9673/ > I used Zope 2.1.6 with python 1.5.2 on Debian Linux 2.2r2. > > While developing in Zope should be fast, unfortunately, it was not. > > Some minor things, which would be no problem in any other > language, took me hours to do in Zope. > > Here is a list. I'm sure some things are already solved in the newest > version of Zope. I'm posting this list not to offend, but to help you > improve the system. Feedback is always welcome, please keep it up. Indeed, many issues are already solved in the current release of Zope. Note that Debian Woody has the most recent version, 2.2.4, packaged as a .deb distribution. You don't need to upgrade to Debian Woody to be able to run this; you can download the distribution and use dpkg --install manually: http://packages.debian.org/unstable/web/zope.html > 1) When I make an error in an DTML-page, all my changes are > lost! This is really frustrating. And unnecessary. This is more a browser cache issue, where the browser (esp. Netscape, IIRC), would re-retrieve the edit form when pressing the Back button. Try tuning your browser cache parameters. > 2) Variables with a minus-sign in it! Who came up with that? > Now I have to write <dtml-var expr="_['sequence-length'] > 10">. Yep, they are lame. They are a remnant of the times before expressions in DTML where added, something that many regard as a mistake. You can use <dtml-var> to create an alias of such variables. Another option is using external methods to deal with the coding of these areas; usually you are dealing with logic, not presentation, and that is better suited for Python code. DTML should only be used for presentation. In Zope 2.3 you'll be able to use Python Script objects for this as well, giving you TTW python code. > 3) sequence-start is only valid at the beginning of <dtml-in>. > This really limit it's use, for example to print a 'previous'-button > on the bottom of the page. You can use a seperate <dtml-in> construct for that, using the 'previous' or 'next' attributes. > 4) Zope has an Image object, but you can't ask for the width and > height (which should be trivial). You can actually. In DTML: <dtml-with image>This image is &dtml-width; wide</dtml-with> > 5) You can use <dtml-var myImage> to show an image. But it's > not possible to set border=0, which is also trivial. Use: <dtml-var "image.tag(border=0)"> The tag method generates an <img> tag for you, with the extra attributes inserted. You can also use this to remove or replace the autogenerated alt, width and height attributes, or scale the width and height values. > 6) I invested some time to learn ZClasses. Only to find out the > query-features are very poor, which made it useless to me. > Now I only use 'real' databases. Query features? Could you elaborate? > 7) The <dtml-let> tag is nested. So how can I remember a value > I discovered in an <dtml-in> loop? I am not sure what you mean here. Within a <dtml-let> tag the surrounding namespace is still available, including the <dtml-in> loop values. > 8) I made a big HTML-form to post and edit articles. > To make a form to edit an article, I used: > <dtml-in getArticle> > <form..>Big form here</form> > </dtml-in> > But how can I use the *same* big form for a new article? > I think putting the form in another file (as I did) is not the right solution. Why not? Putting the form into a seperate DTML Document or Method would make the form a reusable object, which to me looks like the right thing to do in this case. > 9) I consider this a bug: <dtml-var expr="objectValues()[0]"> > gives the value HTML-quoted. Very strange. I can't reproduce this. What object is returned by objectValues()[0]? (objectValues returns an array of object instances, of which you select the first, which is then 'represented' in the output stream). > 10) It's pretty hard to use a checkbox in a form. Browsers don't > submit unchecked checkboxes, which result in Key-errors. > Writing wrappers for every checkbox is an ugly way to solve this. Use a hidden value with ':default' appended to the name. This makes the variable alwas available, browsers always send hidden fields, even if the value is empty: <input type="hidden" name="a_checkbox:default" value=""> <input type="checkbox" name="a_checkbox" value="1" checked> Even if the user now unchecks the 'a_checkbox' box, your object will be handed a 'a_checkbox' paramater, which will be an empty string. > 11) Some dates in my (MySQL) database are "0000-00-00 00:00:00". > I couldn't find a way to handle this in Zope. All I got was errors. > Even putting the code between <dtml-try> tags didn't solve it. You may want to contact the author of the MySQL db adapter you are using and file a bug (with testcase). > 12) Zope's homepage says: "Zope enables teams to collaborate...". > But Zope doesn't provide tools to prevent users editing the same > document at the same time. Check-in and -out mechanisms are > really important in "collaborating teams". You can use Version objects; they have a downside in that they lock objects that have been altered. Not CVS yet, but gives you minimal checkin-checkout support. > 13) Zope inserts a <base href=".."> tag in every page. Because I > put Zope behind a Apache proxy, this is really horrible. I still couldn't > find a way to turn this off. You can use the SIteAccess product for this; it'll rewrite Zope's internal notion of what the base URL should be. www.zope.org runs behind Apache with this. Many others on the Zope list can help you configure it. > 14) I saw the documentation has improved last week. Unfortunately > it was too late for me. It was (excuse me) really bad. I hope someone > with teaching-skills will rewrite the text. What documentation are you referring to? The Zope.org documentation page at www.zope.org/Documentation now also lists status; you can see at a glance what documentation is new and what isn't. You can also send detailed comments to docs(a)digicool.com. > 15) I and someone else tried to install the MySQL database adapter > under Red Hat Linux. Using detailed instructions and common > sense didn't help. Fortunately, installing under Debian was much > easier. I thinks many others will not change their Linux distribution > or database system and just forget about Zope. If you contact the maintainer of the Product, maybe the procedure could be improved? > I hope some day we will have a open source content management > system that can compete with the commercial ones. If you've ever seen Vignette's and Broadvision's solutions from close by, you'll agree that that isn't too hard. :) I'll let others comment on the competitive strengths and weaknesses of Zope though, I may be biased. ;) -- Martijn Pieters | Software Engineer mailto:mj@digicool.com | Digital Creations http://www.digicool.com/ | Creators of Zope http://www.zope.org/ ---------------------------------------------

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parameters
by Nuno Goncalves 19 Dec '00

19 Dec '00

Hi everybody ! I'm trying to pass some parameters to a dtml method. It's something like <dtml-var expr="template(menu, menu2)"> written in a dtml document XPTO. template is a dtml method ! Question is : Is it possible to catch in a dtml method the parameters passed by <dtml-var expr="template(menu, menu2)"> ??? How can i catch menu and menu2 in the dtml method template ?? thanks in advance best regards, Nuno

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Newbie question - Link between Methods based on Authorization
by Michal Krejza 19 Dec '00

19 Dec '00

I am still newbie in Zope, so my question may be stupid - sorry. I have problem with access to method. Example - There are two methods: A and B. Method A contains common information, accessible for all user (include anonymous). Source code in method B updates data for method A and access for method B is restrict only for users with roles "AdminTables". There is a link from method A to method B in the code of script A, and this link is viewable for all user (also for anonym). After click on this link, user is asked for authentication. So there is no problem, but HOW MAKE THIS LINK VIEWABLE ONLY FOR USER WITH AUTORIZATION FOR OBJEKT B ??? Thx for your tips, Michal

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A groupware package for zope
by morten＠esol.no 19 Dec '00

19 Dec '00

For the last couple of months I've been working on a groupware package for Zope, named ZopeGUM. It has reached version 0.1.63 now, and it's in steady progress. All the planned components, like messenger, address book, calendar, todos, etc. are there and working now; though it's definently not ready for a production enviroment yet. Anyways, just wanted to let you all know. (And yes, I do appreciate feedback. =) -Morten

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Editing Property Sheet HTML
by Geoffrey L. Wright 19 Dec '00

19 Dec '00

The question is ... how do I do it? I'd like to make the default textarea field quite a bit bigger -- but I wasn't able to explore my way to success in the interface, and about 20 mins of seaching has yielded no answers. Then again, it's pretty late, so mebbe I'm just being dim.... TIA for any help, //glw

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Re: [Zope] Newbie question - Link between Methods based on Authorization
by Oliver Bleutgen 19 Dec '00

19 Dec '00

> I am still newbie in Zope, so my question may be stupid - sorry. > I have problem with access to method. Example - There are two methods: A > and > B. Method A contains common information, accessible for all user (include > anonymous). Source code in method B updates data for method A and access > for > method B is restrict only for users with roles "AdminTables". There is a > link from method A to method B in the code of script A, and this link is > viewable for all user (also for anonym). After click on this link, user is > asked for authentication. So there is no problem, but HOW MAKE THIS LINK > VIEWABLE ONLY FOR USER WITH AUTORIZATION FOR OBJEKT B ??? Try http://zdp.zope.org/projects/zsnippet/snippets/DTMLContent/PermissionContent and zdp.zope.org in general. cheers, oliver

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Weired catalog_object problem in python product
by Grégoire Weber 19 Dec '00

19 Dec '00

Hi, I read about ZCatalog been _the_ method of managing and searching objects in the ZODB. So I decieded to do searches and lists of object using ZCatalog. After reading all how-to's/API-doc about ZCatalog, a lot in mailings lists and studying a lots of code (ZDiscussions, Squishdot, PTK) I tried to use ZCatalog the proper way. But there is one problem I could not solve for about 8 hours of work. A short description of what my code does: I have three classes (NewsManager, NewsItem and ContentFolder) caring about news items. If I am creating a news item, it's object gets saved and cataloged in the content folder (the content inherits from ZCatalog). The NewsManager object responsible about creating the news item is named news and resides in the same directory as the folderish content object does. So the directory structure is: /orgname/content (content object, inherits from Products.ZCatalog) /orgname/news (NewsManager object, inherits from OSF.Folder) Now the problem (for a step by step description see below): The news items are correctly created in the content folder. But the item is cataloged as it would reside in xxx/news/content (which does not exist). I use self.absolute_url(relative=1) (called by __uniqueCatalogId()) to generate the catalog id (see manage_afterAdd below). It seems (for me) that some aquisition magic is going on. Later when I edit the news item (manage_editNewsItem called by manage_editNewsItemForm) there appears an additional catalog entry with the id xxx/content. Now there are two catalog entries for one news item. If I delete the news item manualy using the zope management GUI one of these catalog entries will be deleted only. Hints: 1) The following status message appears in zopes error log after having edited /orgname/news/content/20001219_news000022: 2000-12-19T11:10:41 ERROR(200) Catalog uncatalogObject unsuccessfully attempted to uncatalog an object with a uid of /orgname/content/20001219_news000022. 2) It seems for me that the magic resides in absolute_url(). Does somebody know about a solution of this problem or have an additional hint about generating catalog id's (it's a requirement for me to have the /orgname/-info in the catalog id!)? I'am a Zope newby, so forgive me errors that are obvious. System and SW-Versions: - WinNT4 SP6 US - Zope 2.2.4 started manualy Remark: It's all programmed in Python because I don't like GUI programming tools (click, click, ... :-( ). So I implement all logic in python (as a Product). >>>>>>>>> what I've done in the zope management GUI <<<<<<<<<< Create a news item: http://localhost:8080/up/news/manage_addNewsItemForm View Contents (content folder): http://localhost:8080/up/content/manage_main --> item 20001219_news000022 is listed and links to: --> item 20001219_news000022 is listed and links to: http://localhost:8080/up/content/20001219_news000022/manage_editNewsItemForm View Cataloged Objects (content folder): http://localhost:8080/up/content/manage_catalogView --> content contains 1 record(s). NewsItem /up/news/content/20001219_news000022 (test item) ??? why catalogized with path containing /news/? Edit the item by clicking the link in Cataloged Objects: Edit the item by clicking the link in Cataloged Objects: http://localhost:8080/up/news/content/20001219_news000022/manage_editNewsIte mForm View Catalog Objects: http://localhost:8080/up/content/manage_catalogView --> content contains 2 record(s). NewsItem /up/news/content/20001219_news000022 (test item) NewsItem /up/content/20001219_news000022 (test item edited) ??? why couldn't the old item be uncatalogized? ??? why the changed item is catalogized without /news/ path? !!! I think there is one answer to both questions! !!! Rem.: I'd like to have the items cataloged without /news/ in the path. remarks: 1) content is the folder containing all kind of items 2) content is also a ZCatalog folder containing a Vocabulary >>>>>>>>> Code snippets <<<<<<<<<< #---------------------------------------------------------------------- # NewsManager.py # # The only functionality of NewsManager is adding a new newsItem. It # builds a unique news item id and then calls the addNewsItem method of # NewsItem. #---------------------------------------------------------------------- class NewsManager(OFS.Folder.Folder): # ... some code def __init__(self, parentFolder, contentFolder): self.contentFolder = contentFolder self.newsCounter = 0 return dbhelpers.instObject(self, parentFolder, "news") # ... unimportant another code manage_addNewsItemForm = NewsItem.manage_addNewsItemForm def manage_addNewsItem(self, title, abstract, location, generator, prio, date_syn, date_pub, REQUEST=None): "write news item in content folder" id = time.strftime("%Y%m%d", time.localtime(time.time())) \ + "_news%06d" % (self.newsCounter) self.newsCounter = self.newsCounter + 1 return NewsItem.manage_addNewsItem(self.contentFolder, id, title, abstract, location, generator, prio, date_syn, date_pub, REQUEST) #---------------------------------------------------------------------- # NewsItem.py #---------------------------------------------------------------------- class NewsItem(OFS.SimpleItem.SimpleItem): "A news item in the subscriptable news system." meta_type = "NewsItem" def __init__(self, **para): # ... set parameters, eg.: self.catalogFolder = para['catalogFolder'] manage_editNewsItemForm = Globals.HTMLFile("newsitem_editform", globals()) def manage_editNewsItem(self, title, abstract, location, generator, prio, date_syn, date_pub, REQUEST=None): "Save changes to News Item" # ... save changed parameteres # recatalog object (rem.: self.catalogFolder is the catalog) try: self.catalogFolder.uncatalog_object(self.__uniqueCatalogId()) except ValueError: pass self.catalogFolder.catalog_object(self, self.__uniqueCatalogId()) # ... etc. def __uniqueCatalogId(self): return '/' + self.absolute_url(relative=1) def manage_afterAdd(self, item, container): # copied from ZDiscussions.py, see additional remarks there OFS.SimpleItem.SimpleItem.manage_afterAdd(self, item, container) self.catalogFolder.catalog_object(self, self.__uniqueCatalogId()) manage_addNewsItemForm = Globals.HTMLFile("newsitem_addform", globals()) def manage_addNewsItem(parentFolder, id, title, abstract, location, generator, prio, date_syn, date_pub, REQUEST=None): "Save changes to News Item" # instanate object (parameters have to be set in NewsItem (and before the # instanation of the object) because ZCatalog calls implicitely manage_afterAdd. newsItemObj = dbhelpers.instObject(NewsItem(catalogFolder = parentFolder, abstract = abstract, location = location, generator = generator, prio = prio, date_syn = various.datestr2epoch(date_syn), date_pub = various.datestr2epoch(date_pub)), parentFolder, id, title) if REQUEST is not None: return Globals.MessageDialog(title = 'Edited', message = '<strong>%s</strong> has been edited.' % newsItemObj.id, action = 'manage_main') #---------------------------------------------------------------------- # ContentFolder.py: folder containing content #---------------------------------------------------------------------- class ContentFolder(ZCatalog.ZCatalog): "The news management system" def __init__(self, parentFolder, id, title=''): # initialize ZCatalog (content folder is a ZCatalog!) ZCatalog.ZCatalog.__init__(self, id, title) # index setup (id and title allready catalogued by ZCatalog) self._catalog.addIndex('abstract', 'TextIndex') # ... etc. # meta-data colums setup (id and title allready catalogued by ZCatalog) self._catalog.addColumn('abstract') # ... etc. return dbhelpers.instObject(self, parentFolder, "content") #---------------------------------------------------------------------- # dbhelpers.py #---------------------------------------------------------------------- def instObject(obj, parent, id, title=''): """instanates an object in the ZODB obj = Object to instanate parent = parent folder object id = the id of the document title = title of the document (optional)""" obj.id=str(id) obj.title=title parent._setObject(id, obj) return parent._getOb(id) # == obj (see OSF/Folder.py) _______________________________________________________ Grégoire Weber Rigistr. 31 CH-8006 Zürich Switzerland phone: +41-(0)1-361 66 11 mobile: +41-(0)79-44 11 457 mailto:gregoire.weber@switzerland.org Gregi's Handy-Handhabung: http://www.topics.ch/greg/ghh

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