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RE: [Zope] Versions and write conflicts
by Fernstrom, Christer 12 Apr '01

12 Apr '01

Well, that should work, provided all writing is encapsulated in scripts. But if you present management screens to users, there is no guarantee they will check this time stamp property before they do their first save. BTW. Thanks Tim for helping me getting started with the programmatic management of versions last week. christer > I have tried to work around the problem by programatically create a version, put the user in the version, and - before opening the management screen - do a manage_edit on the document. This all works fine, but strangely the manage_edit doesn't seem to lock the file, so although it relieves the user of the burden to think about opening a version before start making changes, the problem mentioned above still remains. > Unfortunately I found the same thing. Andy made the suggestion to use a (rather old) technique to open a document, write a date/time stamp to a property and then test for the same date/time stamp before writing the changes. While this can cause some problems in a heavy editing situation where several users may edit something, I don't have the issue. It's not perfect, but it does work for me. The transaction machinery is available in the source but I haven't taken the time to try and use it. Probably should though. HTH, -- Tim Cook, President - FreePM,Inc. http://www.FreePM.com Office: (901) 884-4126 ONLINE DEMO: http://www.freepm.org:8080/FreePM

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RE: [Zope-dev] Using Python script to create ZClass instances
by Bjorn Stabell 12 Apr '01

12 Apr '01

After hours of fiddling around, I've already given up Python methods, but I can't even instantiate MySubZclass via External Methods?!?!? MyProduct . MyZClass . MySubZClass 1. folder.manage_addProduct['MyProduct'].MyZClass.MySubZClass_add(id) -> AttributeError for MySubZClass_add 2. folder.manage_addProduct['MyProduct'].propertysheets.methods['MySubZClas s_add'](id) -> NameError on MySubZClass (at least it gets to the constructor method) I really think one of the major pains of Zope is just instantiating objects... It's HELL hard, and NOT intuitive. -----Original Message----- From: Bjorn Stabell Posted At: Thursday, April 12, 2001 12:02 Posted To: Zope Developer Conversation: [Zope-dev] How do I call an HTMLFile in context provided by apath? Subject: [Zope-dev] Using Python script to create ZClass instances Hi there, Im having problems using Python script to create a ZClass instance from a ZClass that's inside of another ZClass. I have this addMyObject Python script as constructor script for "Scriptable Type Information" type object (CMF): ## Script (Python) "addMyObject" ##bind container=container ##bind context=context ##bind namespace= ##bind script=script ##bind subpath=traverse_subpath ##parameters=folder, id ##title= ## folder.Control_Panel.Products.MyProducts.MyObjects.MyObject_add(id) # folder.manage_addProduct('MyProduct')... doesn't work either item = getattr(folder, id) return item MyObjects is a ZClass that contains MyObject. The error I get is: Zope error Error type AttributeError Error value MyObjects There should be some explanation somewhere how to access resources inside of Control_Panel, but I fail to find it. Creating objects is very confusing and difficult at times... Bye, -- Bjorn Stabell <bjorn(a)exoweb.net> _______________________________________________ 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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hiding includes from webacces
by Nils Decker 12 Apr '01

12 Apr '01

Hello, Is there a way to deny direct access to Objects, but allow them to be included into other documents? I have tried to setup a role "include" and set my index_html to proxy to this rule, but it did not work. i am trying to forbid direct access to includes. E.g: http://foo/standard_html_header should not be allowed, because standard_html_header is not a full page, but it is included in every page. Thank you in advance Nils Decker

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Re: [Zope] PUT_Factory question (quick ;-)
by Petr Knapek 12 Apr '01

12 Apr '01

>>>>> On Thu, 12 Apr 2001 13:31:24 +0100, Chris Withers <chrisw(a)nipltd.com> said: Hi Chris, CW> Will WebDAV use a PUT_factory if it's there? cheers, CW> Chris I use it in Zope 2.3.0 to import instances of my own Python products over HTTP into ZODB (as webDAV client used MSIE 5.0) It works OK for me. But in my case I had to hack a little NullResource.py in webdav/ of Zope for my purposes. I am not sure if it is OK in all cases that NullResource inherits from Acquisition also. In my case I have a python product ISNGFolder (PUT_factory is defined only here) which inherits from classical Zope Folder. And when I have this structure in ZODB: ISNGFolder/ ZopeFolder/ then PUT_factory of ISNGFolder is called when I try to put over webDAV into ZopeFolder. This is what I had to hack. Petr -- Petr Knápek Network Development NEXTRA Czech Republic s.r.o. http://www.nextra.cz/ V Celnici 10 / CZ - 117 21 Praha 1 / Czech Republic Tel: +420/2/96 355 111 / Mobile: +420/604-202 611 E-Mail: petr.knapek(a)nextra.com Contact address: Hlinky 114 / CZ - 603 00 Brno / Czech Republic Tel: +420/5/43 554 150 see Disclaimer http://www.nextra.cz/disclaimer/

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Versions and write conflicts
by Fernstrom, Christer 12 Apr '01

12 Apr '01

Versions in Zope go some way to help controlling concurrent updates to documents, but unfortunately there is a problem: If you work in a version and open a document for editing, the file is not yet locked. It is only after you have done the first save that it becomes locked. This means that if you open and start changing, somebody else, who is working in another version, may sneak in, open the document, change it, save the changes, and save the version changes without you ever noticing. Then when you finally save and save your version, you wipe out the changes done by the other poor guy. This without anybody noticing. I have tried to work around the problem by programatically create a version, put the user in the version, and - before opening the management screen - do a manage_edit on the document. This all works fine, but strangely the manage_edit doesn't seem to lock the file, so although it relieves the user of the burden to think about opening a version before start making changes, the problem mentioned above still remains. christer

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Virtual Host Monster & the Undo Tab
by Chris Withers 12 Apr '01

12 Apr '01

Hi Evan, Sorry if it seem like I'm picking on you, it's your fault for adding so many great features to Zope ;-) Noticed a bit of a weirdity with Virtual Host Monsters and the Undo Tab. Basically, at appears as if all (may some, which would be worse...) objects accessed via a virtual host monster only appear in the Undo tab of the root of the ZODB. They don't show up on the Undo tab of the object (say it's a folder) at all. The smells like a bug to me but I can see why it's happening, so I thought I'd ask here first to see what other people thought... cheers, Chris

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Re: [Zope] insane Central Daylight Time, Zope 2.2.2
by Anthony Baxter 12 Apr '01

12 Apr '01

> > Or just use UTC/GMT. If your system writes down any records with > > datestamps in them, you may find horrible things happen to you as > > you switch on and off daylight savings. > > For storage and logic I agree. But for display, users like to see > the time in reference to 'current local'. But what's "current local" mean on the web? The webserver's timezone? What I've found works ok is to put the date/time in UTC, but also include something like 21:34 10 April 2001 (3 hours ago) The system's current time is 0:45, 11 April 2001. This is what pretty much all the date/time stuff on the ekit site does - seems to work not too badly. Anthony.

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Don¹t use cookiecrumbler product in same folder as UserDB
by Tony McDonald 12 Apr '01

12 Apr '01

Just a *minor* note for people here... If you're using UserDB for authentication (or I guess *any* kind of cookie based authentication), stay away from the 'CookieCrumbler' product - at least in that folder. Briefly: (1) UserDB sets authentication cookies, (2) CookieCrumbler eats authentication cookie (yum!) (3) Popup dialog for authentication rather than nice 'in the page' form appears (4) Tony looks at site and code that he *knows* works elsewhere and spends 4 hours going cross-eyed. Makes a change, Quits Netscape, starts Netscape, tries it again. GOTO (1) Astute readers will note there is no escape route from this scenario apart from enlightenment. "That was a party political broadcast, on behalf of the ZopeZen party." -- Dr Tony McDonald, Assistant Director, FMCC, http://www.fmcc.org.uk/ The Medical School, Newcastle University Tel: +44 191 243 6140 A Zope list for UK HE/FE http://www.fmcc.org.uk/mailman/listinfo/zope

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Database indexing using Z Catalogs
by Honey George 12 Apr '01

12 Apr '01

Hello, I am not able to find a way to index and external database say PostgreSQL using Z Catalogs and search the contents. Can anybody help me in this. I couldn't find a complete documentation in the zope site. It will be helpfull to me if somebody can explain to me using an example. Regards, Honey __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/

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Database indexing using Z Catalog
by Honey George 12 Apr '01

12 Apr '01

Hello, I am not able to find a way to index and external database say PostgreSQL using Z Catalogs and search the contents. Can anybody help me in this. I couldn't find a complete documentation in the zope site. It will be helpfull to me if somebody can explain to me using an example. Regards, Honey __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/

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