July 1999 - Zope - Zope lists

Tree navigation
by Jens Vagelpohl 27 Jul '99

27 Jul '99

hi everyone, this morning a list member had a question about how to synchronize a tree with a page being opened, i am trying to do the very same. it is not a problem to create a link to the specific document within the tree, but how can i make sure the tree that displays the navigational choices (it's in the standard_html_header of the document i am displaying) is in synch with the page i am linking to, meaning the book is "open"? something else. in regards to michel's Question, i think it might be really hard to adequately describe zope in one sentence.......................... :) Jens Vagelpohl

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RE: [Zope] Forms with Zope
by Michel Pelletier 27 Jul '99

27 Jul '99

> -----Original Message----- > From: Cyril Elkaim [mailto:cyril@microform.fr] > Sent: Tuesday, July 27, 1999 10:04 AM > To: Zope Mailing List (E-mail) > Subject: [Zope] Forms with Zope > > > Hi all, > > > I'm a complete newbie with Zope. I've installed the > beast and it works > great. I would like to know if it is possible to create a 'classical' > database application with forms. > > The goal is to have the app accessing a database that > the users will > fill as the information come in. Sure this is very easy in Zope. You will need a database, and the apropriate Zope Database Adapter. Create a Database Connection and type in a valid connection string which connects you to your database. Create a DTML method 'input' with your form in it, with the form action pointing to another DTML Method 'output' ie: <form action="output">. Let's say one of your form elements is named 'name' ie: <input type="textbox" name="name">. Create a ZSQL Method called 'insertName' with one argument, 'name' and containing SQL code that inserts this value into the database. something like: INSERT INTO my_table_with_one_column_called_name name VALUES () Now create the 'output' DTML method to contain:   Thanks for the input!  Now, when a user goes to 'input' and fills in the form, the form will 'action' to output, which will call the ZSQL method 'inserName' which will insert the name into the database, and then the 'output' DTML method will say something nice, and that's it. -Michel > > Is there is a tutorial to do such a thing? > > Thanks in advance, > Cyril Elkaim > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For developer-specific issues, zope-dev(a)zope.org - > http://www.zope.org/mailman/listinfo/zope-dev ) >

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Forms with Zope
by Cyril Elkaim 27 Jul '99

27 Jul '99

Hi all, I'm a complete newbie with Zope. I've installed the beast and it works great. I would like to know if it is possible to create a 'classical' database application with forms. The goal is to have the app accessing a database that the users will fill as the information come in. Is there is a tutorial to do such a thing? Thanks in advance, Cyril Elkaim

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RE: [Zope] Zope 2 ODBC date errors
by Brian Lloyd 27 Jul '99

27 Jul '99

> > Jay, > > > > Did you submit this patch to the Collector, or just to the list? > > I don't see it in the Collector anywhere, but if you'll copy it > > to me via email I can put it in there to make sure it gets > > attention. > > Its in the collector as being completed > http://www.zope.org/Collector/314/view > > The not sure if the line number is still valid but the patch was: > ... Ok, I think I've figured it out - the patch _was_ included, but I inadvertantly introduced a bug into it that would cause it to fail for positive-offset timezones. I've checked in the fix. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Decision time
by Itamar S.-T. 27 Jul '99

27 Jul '99

I've been hanging around the list, looking at Zope, and I really really like it. If I had to create a small or medium website I'd use it without hesitation. However, I would like to use it for a website that'll hopefully be visited by a lot of people. And I do mean a lot. So the question is, can Zope handle it? Will Zope be able to scale even to high loads? So I'd like to hear from people who use it now, especially from DC, what kind of loads you've used it under, how many hits it help up under, benchmarks, whatever can reassure me that Zope can handle high loads. 'Casue I really do want to use Zope. I know each website is different, and benchmarks don't mean much, but I'd still be very interested in such information. -- Itamar - itamars(a)ibm.net ----------------------------o----------------------------------------------o Sealingwax Greeting Cards | Trust? Ha! The US dollar is backed by ICBMs! | http://www.sealingwax.com | --Anonymous Coward, Slashdot |

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RE: [Zope] ZClass subclassing a File
by Brian Lloyd 27 Jul '99

27 Jul '99

> OK, I have yet another one (thanks for all the answers so far...) > > I have a ZClass that has some properties, etc. I want it to > be a subclass of > other ZClasses that I have defined, and the "File" type > provided by Zope. > > What I want is a "File" that Zope recognizes, so that I can > load a file in, > etc., but have the various properties/methods available > also... can this be > done? > > If I define my ZClass (say MSFile) as a subclass of > MSFileHolder (which > provides some generic file/image handling that I want to do), > and a subclass > of File, then it works as a File (I can never seem to see the > Properties > pages, etc. that I set... if I open the instantiation of the > object in the > management interface, I just see it as a "File"... its as if > the other stuff > doesn't exist. > > Am I way off base here? No - you just need to create "views" for the property sheets that you want to be able to manipulate for your MSFile instances. A quick example: go to your MSFile ZClass and click on "Property Sheets", and create a property sheet called "ExtraProperties" with a few defined properties. Next, click on the "Views" tab of your MSFile class and add a new "view" that points to that property sheet (type "Extra" in the New text box, and select "propertysheets/ExtraProperties/manage" from the select list and click the "Add" button. Now your MSFile instances should have an "Extra" tab in their mgmt interface, which will take you to the form for managing the extra properties on that instance. Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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RE: [Zope] VersionBase?
by Brian Lloyd 27 Jul '99

27 Jul '99

Phil, Can you make sure to post this to the Collector? http://www.zope.org/Collector/ We want to make sure none of these issues get lost in the currents of the mailing lists. Thanks! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com > -----Original Message----- > From: Phil Harris [mailto:phil@philh.org] > Sent: Tuesday, July 27, 1999 4:00 AM > To: zope(a)zope.org > Subject: [Zope] VersionBase? > > > Hi all, > > Just started looking at the Zope2 b1 and think I may have found a bug. > > If I create a Zope Draft and then try to do anything with it, > even just > opening it, I get this traceback: > > Traceback (innermost last): > File C:\PROGRA~1\zope2b1\lib\python\ZPublisher\Publish.py, > line 256, in > publish_module > File C:\PROGRA~1\zope2b1\lib\python\ZPublisher\Publish.py, > line 145, in > publish > File > C:\PROGRA~1\zope2b1\lib\python\ZPublisher\BaseRequest.py, line 289, > in traverse > File C:\PROGRA~1\zope2b1\lib\python\Products\OFSP\Draft.py, > line 155, in > __bobo_traverse__ > (Object: qs) > AttributeError: VersionBase > > The error as reported in the browser is: > > Zope Error > Zope has encountered an error while publishing this resource. > > exceptions.AttributeError > > Sorry, a Zope error occurred. > > Any ideas? > > Phil > phil(a)philh.org > > > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (To receive general Zope announcements, see: > http://www.zope.org/mailman/listinfo/zope-announce > > For developer-specific issues, zope-dev(a)zope.org - > http://www.zope.org/mailman/listinfo/zope-dev ) >

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Down-level user folder conflict
by Alexander Staubo 27 Jul '99

27 Jul '99

I have another interesting authorization failure problem (Zope 2.0.0b1). Let's say I have folder called Restricted. Permissions for this folder is restricted to users of a specific privileged role called Editor. Inside this folder I also have a standard user folder with one such Editor user defined. The problem arises when the user is viewing a document in the Restricted folder, and the document is referring to objects -- such as images through <img> tags -- from the _unrestricted_ part of the database. It'll give "Unauthorized" on these objects no matter what. Remember that these objects aren't restricted at all; the Anonymous role has full View access. My suspicion is that if the browser passes an authentication header that does not match a valid user (known to the folder or any up-level folders through acquisition; in my case the whole idea is that the user folder is not visible from the part of the site that the browser passes an authentication header to), then Zope will not revert to the anonymous role, but will instead just block the user unconditionally. If I move the user folder into the top-level folder, everything is groovy. Sounds like a bug, anybody care to comment before I bung it in the Collector? -- Alexander Staubo http://www.mop.no/~alex/ "QED?" said Russell. "It's Latin," said Morgan. "It means, So there you bastard." --Robert Rankin, _Nostramadus Ate My Hamster_

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RE: [Zope] ODBC and Inserting not committed
by Alexander Staubo 27 Jul '99

27 Jul '99

Not to nitpick -- well, all right, it IS to nitpick: ;) "Thunking" is usually referred to bridging between interfaces of different bitness; for example, calling 16-bit code from a 32-bit native process. Its generic meaning is, historically at least, "a compiler-generated stub procedure". As legends go, "thunk" is a deliberate misspelling of "thought" ("the past tense of `think' at two in the morning"). Afai, it's a formalized construct in Scheme -- the closest analog in Python I guess would be code objects. Jargon file says this: http://www.srdc.metu.edu.tr/dengi/computer/jargon/thunk.html You could extend "thunking" generally to mean any bridge-like service, I guess (first time I've seen this usage), but isn't that what we use "wrapper" for? In this case, a serializing or single-access wrapper. Sorry if I'm being a nuisance. :) -- Alexander Staubo http://www.mop.no/~alex/ "QED?" said Russell. "It's Latin," said Morgan. "It means, So there you bastard." --Robert Rankin, _Nostramadus Ate My Hamster_ >-----Original Message----- >From: Michel Pelletier [mailto:michel@digicool.com] >Sent: 27. juli 1999 05:57 >To: Graham Chiu >Cc: zope(a)zope.org >Subject: Re: [Zope] ODBC and Inserting not committed > > >Graham Chiu wrote: >> >> Hi, >> >> With 2b1, win32, I now find that my Zsql inserts don't commit. They >> last for as long as the browser is active. I start another browser >> session after closing the first one down, and they're gone. >> > >It's possible, although I have not personally looked at the code, that >the ODBC adapter has not been updated to work with the new ZODB3 >transaction manager. > >Try running Zope in single thread mode ('-t 1' on the z2.py command >line) and see if the problem persists. If so, then the ODBC >driver will >probably need to be 'thunked' which is a pretty trivial 10 >minute change >to the code. > >Note that thunking a DA has side effects! 'Thunking' means to wrap the >Zope DA transaction manager in a thread lock. What this means is that >if a DA is thunked, it will work in a multi-threaded Zope, but all ZSQL >queries will be serialized at the Zope transaction layer *including >queries from other thunked DAs!* This means that all thunked DAs block >each other at Zope transacion boundaries (Zope transacion >boundaries are >usually but not allways, single requests, like an HTTP request). This >does not apply to completly thread safe (or, level 3) DAs. To sumarize >the levels: > >Level 1: Not threadsafe, concurrent or thunked. Zope MUST run >in single >thread mode > >Level 2: Not concurrent, but threadsafe and thunked. Zope can run in >thread mode > >Level 3: Threadsafe and concurrent. Zope can run in thread mode > >Going from level 1 to 2 is usualy trivial. That I know of, Gadfly and >the soon to be released ZSybaseDA are level 2. Level 3 is much harder, >and I believe that DCOracle will probably be the first level 3 DA there >is. > >-Michel > >> Updates seem to commit though. >> >> Bizarre. >> >> ------- >> Regards, Graham Chiu >> gchiu<at>compkarori.co.nz >> >> _______________________________________________ >> Zope maillist - Zope(a)zope.org >> http://www.zope.org/mailman/listinfo/zope >> >> (To receive general Zope announcements, see: >> http://www.zope.org/mailman/listinfo/zope-announce >> >> For developer-specific issues, zope-dev(a)zope.org - >> http://www.zope.org/mailman/listinfo/zope-dev ) > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://www.zope.org/mailman/listinfo/zope > >(To receive general Zope announcements, see: >http://www.zope.org/mailman/listinfo/zope-announce > >For developer-specific issues, zope-dev(a)zope.org - >http://www.zope.org/mailman/listinfo/zope-dev ) >

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ODBC and Inserting not committed
by Graham Chiu 27 Jul '99

27 Jul '99

Hi, With 2b1, win32, I now find that my Zsql inserts don't commit. They last for as long as the browser is active. I start another browser session after closing the first one down, and they're gone. Updates seem to commit though. Bizarre. ------- Regards, Graham Chiu gchiu<at>compkarori.co.nz

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