October 1999 - Zope - Zope lists

RE: [Zope] ZClass propertysheet: Selection/Multi selection/Token - how?
by Ian Blenke 17 Oct '99

17 Oct '99

On Sat, October 16, 1999, Kam Cheung wrote: > > The problem: Some of the input fields are selection dropdown lists and > > multiple-selection lists that represent fixed options. These options will > > have spaces in them (killing a :token implementation). These options will > > need to appended to in the future. > > The simpliest method -- Create a custom EditForm and Edit DTML method inside > your ZClass. Then click your the "View" tab in your ZClass, assign a view to > the EditForm (make it the first view, and preferably, remove the standard > properties view as well). > > If you do that, when your users click on the ZClass's instance, they will be > presented with your EditForm. So, instead of using a "list" property or Tiny Table object to hold the fields within the edit page, I *must* statically populate all of the <SELECT><OPTION></OPTION>...</SELECT> lists on a main edit page? The idea here is to make the ZClass edit panel a bit more dynamic - in that I can merely add to a list whenever a new list option needs to be edited. My problem so far is based around the problem that: methods defined *outside* of the ZClass (_add, _addForm, _classFactory, etc) seem to aquire the namespace of the Product that they are located in *at creation time only*. The propertysheet within the ZClass can see methods defined within the ZClass (through aquisition), but not the outside methods. So, another solution was given: try a :lines property on the Product to hold the options. Well, this works great for _add and _addForm - but the properties do not show up in the namespace of an 'instanciated object of that Product'. So, when the user goes to edit a created object, there is nothing to use to automagically fill in the dropdown boxes. Thinking about it for a bit, one would think that the following in _add would work: (WARNING, This doesn't work... perhaps someone can tell me why) In MyTestProduct, populate MyFirstOptionList and MySecondOptionList in the Product properties. In MyTestZClass_add: <dtml-with "MyTestZClass.createInObjectManager(REQUEST['id'], REQUEST)"> <dtml-call "REQUEST.set('MyFirstOptionList', _['MyFirstOptionList'])"> <dtml-call "REQUEST.set('MySecondOptionList', _['MySecondOptionList'])"> <dtml-call "propertysheets.Basic.manage_editProperties(REQUEST)"> </dtml-with> Using something like this, it would theoretically copy the properties from the Product namespace into the created Object's namespace. What am I doing wrong? How else can I carry around a list of options to be used both during the creation of a ZObject instance and during its operation? - Ian C. Blenke <ian(a)blenke.com> <icblenke(a)2c2.com>

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zope vs. siteserver from ms.siteserver newsgroup
by Chris McDonough 17 Oct '99

17 Oct '99

Here's an exchange I had with a guy in the MS Site Server general Usenet Newsgroup... can anyone find exception with his or my arguments? Additionally, he doubts the ability of Zope to handle large sites (near the end of the message). Any clarifications are appreciated.... I wrote: Thanks for your comments! In article <74D4DC853648D311823F00E018900AD5309923(a)MAIL-BLN.maghan.com>, Thomas Tomiczek <t.tomiczek(a)maghan.com> wrote: > Hm - you gie scalability a tie. I think, MS is the winner here. > No, actually, it was stability... I didn't compare the two for scalability. Its an undertaking I didnt have time for. > SiteServer uses ASP for development, but you can also use other stuff > (ISAPI Extensions, for example). The paradigm is to put mot or all of > the more complex logic into COM-objects, which most ot the time are > compiled natively. > > On the opposite, ZOPE is interpreted, not only the templates, even the > server itself. No paradigm like COM is part of the game (though it might > be extended). So ZOPE will be less speedy. I might take exception with this. ASP itself is interpreted (obviously), and isn't the speediest interpreted scripting framework in the world... a recent benchmark of a "hello world" program in ASP/VBScript on IIS pumped out an underwhelming 9.53 req/sec. Please see http://www.google.com/search?q=cache:41196118&dq=cache:www.bitmechanic.com/m ail-archives/modperl/current/0151.html for an explanation. There are no hard numbers on Zope, but ASP/VBScript is not a particularly well-performing web application development language as compared to PHP or mod_perl or other alternatives. As most of your presentation logic will be placed in ASP, it will be your bottleneck. It won't really matter that your COM logic is fast as hell. Please correct me if I'm misunderstanding the argument. Additionally, not all of Zope is written in Python. Key pieces of it are written in C for speed. And when you say "no paradigm like COM is part of the game", you should also know that Zope is completely object-oriented, whereas the ASP/Site Server combination is a mix of mostly procedural structures with some object oriented components (COM objects) thrown in. I don't know if you're criticizing design or function here... > > Also: I really doubt the scalability of the ZOPE Object database, > compared to the SQL Server that is part of the site server licensing. > The ZOPE Object database - well - there are no benchmarks on it. Agreed. > > First Part: > App Development: > You are not really good with statements like "Additionally, the process > of "decoding" some of Microsoft's Site Server-related error messages is > tedious (e.g. "Server Object error ASP 0177:800401f3 Server.CreateObject > failed, line 37, invalid class string")." - Sorry, THIS error message > explains itself quite well. Maybe you can tell me what it means in the context of the failure... it happens in the cmsample application that comes with Site Server. > > "When you do this, you're basically extending the Zope environment by > creating your own object types without having to know a high-level > programming language (ala C++/Visual Basic COM object development)." - > well, just you do it in a slow interpredet language, where C++ COM > Objects will be speedy! Hmmm. I don't know C++. This was my point. With Zope, I don't have to know C++ or even VB to develop object components. I just need to know how to point and click, plus I need to know a little bit of DTML (Document Template Markup Language). > > "The power of this model is formidable. For example, I developed a > "news item" object in 22 minutes which allows my users to add "news > items" to their department for perusal by other department members." - > nive. What about adding 100.000 news items. What is the performance > then? This is unrealistic? OK, lets make an interface for a news server. > 1 million messages a day. Youre dead. Agreed. There isn't enough data. Does anyone in here run a Site Server based site that handles this kind of traffic? It'd be interesting to see what sort of hardware is required... > > I really do not want to critisize you - it is only, that your statements > are NOT backed up. I was also looking at ZOPE, and in my eyes - nice > try. I still have to see a website working with it. A real site, say 10 > million pages a day, all dynamic. Make a setup of Zope in a cluster with > shared session. It can be done in site server. I will forward your message to the Zope list to see if anyone can attest to running such a site.... Many, many thanks for all your comments!! > > Thomas Tomiczek > > -----Original Message----- > From: Chris McDonough [mailto:mcdonc@iqgroup.com] > Posted At: Mittwoch, 13. Oktober 1999 00:54 > Posted To: general > Conversation: Site Server vs. Zope... > Subject: Site Server vs. Zope... > > I've come up with a very basic Site Server vs. Zope (an open-source > application server) comparison from the perspective of using the > packages to develop Intranet sites... I'd be pleased if anyone could > correct or comment on the analysis. > > The comparison is at http://sharon.iqgroup.com/zopevssiteserver.html > > Many thanks! > > Chris > > Sent via Deja.com http://www.deja.com/ > Before you buy. > >

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Help on ZCatalog
by Willie Peloquin 17 Oct '99

17 Oct '99

Hi, I have created a ZClass and would like to use a ZCatalog, I have not been able to find any tutorial or an example to make this work. For example, I want to create a ZClass to contain CD objects, as in the tutorial. I now want to build a search screen to find all my Jimmy Buffett CD's. I use ZCatalog for that. I was able to set up a ZCatalog and find the CD instances, but that is as far as I could get, I don't understand how to search for ARTISTNAME = *, or something similar. Thanks, Willie

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RE: [Zope] help! zope start failure on linux
by Chris McDonough 17 Oct '99

17 Oct '99

Hmmmm... As I understand it, when you start Zope's web server frontend (medusa) in an out of the box config, it spawns seven processes (you can see the processes and their owners by doing a ps -aux). The first process will show its owner as the user which you use to start Zope. The other six processes will be owned by the "nobody" user if started as root. If you start Zope as a nonroot user, all of the threads will be owned by that user. I think :). Make sure you have a nobody user defined in /etc/passwd. Alternately, you can change the user that the "nonroot" medusa processes run under by editing the z2.py file in the root Zope installation directory (check for the line UID='nobody' and change it to what you want). Good luck! - C -----Original Message----- From: Mike Salib To: Chris McDonough Sent: 10/16/99 10:24 PM Subject: Re: [Zope] help! zope start failure on linux Thanks for the quick reply. I've replicated every condition imaginable: When I try to start zope on a high port, it only works when I'm myself (non root). It fails when I start zope as root. For low ports, zope always dies on startup. Do you know what user Zope tuurns itself into after startup as root? I've tried using both the start script and running z2.py from the command line. Any ideas? Thanks a lot, Mike Chris McDonough wrote: > Mike, > > Hi... > > What port are you trying to bind Zope to? 8080? Or one under 1024? And > how are you starting Zope? > > If you're trying to bind to a port under 1024 (such as port 80), you'll need > to start Zope as root. > > - C > > -----Original Message----- > From: Mike Salib > To: zope(a)zope.org > Sent: 10/16/99 9:38 PM > Subject: [Zope] help! zope start failure on linux > > hi everybody, > i'm running Zope 2 under RedHat Linux 5.2 > Every time I start Zope now, I get this error: > > File "/home/mike/Zope-2.0.1-linux2-x86/z2.py", line 430, in ? > logger_object=lg) > File "/home/mike/Zope-2.0.1-linux2-x86/ZServer/medusa/http_server.py", > line 53 > 4, in __init__ > self.bind ((ip, port)) > File "/home/mike/Zope-2.0.1-linux2-x86/ZServer/medusa/asyncore.py", > line 205, > in bind > return self.socket.bind (addr) > socket.error: (13, 'Permission denied') > > I'm not a unix newbie; i've been using unix for years. I know about > basic file permission security. I've performed the following commands > with no effect: > > chown nobody.nobody var > chown nobody.nobody var/* > chmod ago+rwx var > chmod ago+rwx var/* > > I've verified that the var directory itself and all the files contained > therein are owned by user nobody and group nobody and that everything is > readable, writeable, and executable by user, group and all. > > I've also tried repeatedly deleting the pid files in the var directory. > > I've searched the zope(a)zope.org mailing list archives for the last few > months. Other people have reported this problem, but some still can't > seem to get it working. If anyone could suggest what I'm doing wrong > here, please do! > > Thanks a lot, > Mike > > -- > "One World, One Web, One Program" - Microsoft Promotional Ad > "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (Related lists - please, no cross posts or HTML encoding! > > 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 ) -- "One World, One Web, One Program" - Microsoft Promotional Ad "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler

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RE: [Zope] ZClass propertysheet: Selection/Multi selection/Token - how?
by Ian Blenke 17 Oct '99

17 Oct '99

On Sat, 16 Oct 1999, Stuart 'Zen' Bishop wrote: > On Sat, 16 Oct 1999, Ian Blenke wrote: > > > So, another solution was given: try a :lines property on the Product to hold > > the options. Well, this works great for _add and _addForm - but the > > properties do not show up in the namespace of an 'instanciated object of > > that Product'. So, when the user goes to edit a created object, there is > > nothing to use to automagically fill in the dropdown boxes. > > I meant inside the ZClass definition :-) > > In the _addForm, you should be able to reference it as > MyClass.propertysheets.myprops.linesitem (or possibly the ugly > Control_Panel.Products.MyProduct.MyClass.propertysheets.myprops.linesitem) > > And when instantiated, its just a normal property :-) Thanks again for the help, Stuart! Unfortunately, the pain hasn't ended quite yet :) Another workaround alternative to fully qualifying the Product namespace seems to be wrapping all code in the ZCass methods that reference such properties, ie: <SELECT NAME="myselectionname"> <dtml-with "manage_addProduct['MyTestProduct']"> <dtml-in MyOptionList> <OPTION VALUE="<dtml-var sequence-item>"><dtml-var sequence-item></OPTION> </dtml-in> </dtml-with> </SELECT> This works well, and isn't an entirely objectionable approach. Now that I have a working _addForm, the next trick is to get the form fields populated in the created object. The correct place to do this seems to be in _add - where the createInObjectManager is called: <dtml-with "MyTestZClass.createInObjectManager(REQUEST['id'], REQUEST)"> <dtml-comment>  </dtml-comment> </dtml-with> Unfortunately, if you remove the comments, I get a "Error Type: AttributeError", "Error Value: Basic". Attempting to do anything like the following beforehand doesn't seem to help: <dtml-call "REQUEST.set('myselectionname', _['myselectionname'])"> or <dtml-call "REQUEST.set('myselectionname', _.getitem('myselectionname'))"> Off to the ZDG reference, and the following magic appears: <dtml-with "MyTestZClass.createInObjectManager(REQUEST['id'], REQUEST)"> <dtml-call "manage_changeProperties({ 'myselectionname' : REQUEST['myselectionname'] })"> </dtml-with> This doesn't give me an error, but it also doesn't seem to do anything. There's something here I'm not getting, and it's driving me batty. Any help is quite graciously appreciated :) - Ian C. Blenke <ian(a)blenke.com> <icblenke(a)2c2.com> "There's always more than one way to shoot yourself in the foot..."

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RE: [Zope] help! zope start failure on linux
by Chris McDonough 17 Oct '99

17 Oct '99

Mike, Hi... What port are you trying to bind Zope to? 8080? Or one under 1024? And how are you starting Zope? If you're trying to bind to a port under 1024 (such as port 80), you'll need to start Zope as root. - C -----Original Message----- From: Mike Salib To: zope(a)zope.org Sent: 10/16/99 9:38 PM Subject: [Zope] help! zope start failure on linux hi everybody, i'm running Zope 2 under RedHat Linux 5.2 Every time I start Zope now, I get this error: File "/home/mike/Zope-2.0.1-linux2-x86/z2.py", line 430, in ? logger_object=lg) File "/home/mike/Zope-2.0.1-linux2-x86/ZServer/medusa/http_server.py", line 53 4, in __init__ self.bind ((ip, port)) File "/home/mike/Zope-2.0.1-linux2-x86/ZServer/medusa/asyncore.py", line 205, in bind return self.socket.bind (addr) socket.error: (13, 'Permission denied') I'm not a unix newbie; i've been using unix for years. I know about basic file permission security. I've performed the following commands with no effect: chown nobody.nobody var chown nobody.nobody var/* chmod ago+rwx var chmod ago+rwx var/* I've verified that the var directory itself and all the files contained therein are owned by user nobody and group nobody and that everything is readable, writeable, and executable by user, group and all. I've also tried repeatedly deleting the pid files in the var directory. I've searched the zope(a)zope.org mailing list archives for the last few months. Other people have reported this problem, but some still can't seem to get it working. If anyone could suggest what I'm doing wrong here, please do! Thanks a lot, Mike -- "One World, One Web, One Program" - Microsoft Promotional Ad "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler _______________________________________________ Zope maillist - Zope(a)zope.org http://www.zope.org/mailman/listinfo/zope (Related lists - please, no cross posts or HTML encoding! 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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RE: [Zope] ZClass propertysheet: Selection/Multi selection/Token - how?
by Ian Blenke 17 Oct '99

17 Oct '99

On Sat, 16 Oct 1999, Stuart 'Zen' Bishop wrote: > On Sat, 16 Oct 1999, Ian Blenke wrote: > > > Perhaps the real question is "how do I efficiently manage lists of options > > for forms without resorting to SQL?" > > I use a 'lines' property to store the possible settings (myitemvalues) > and create a selection property which gets its values from myitemvalues. > This is a simple method, provided you only need to store a list of items > rather than a list of tuples (in which case you would be better off with > TinyTables). What do you tie the 'lines' property to? The product? Or to another property in a propertysheet within the ZClass? The dtml-return hack doesn't work for the ZClass_addForm method (the object isn't instanciated yet). The next attempt is to try and use properties of the Product. Hopefully the namespace of the Product is available at _addForm time. Understanding the Zope Zen takes a bit of patience :) - Ian C. Blenke <ian(a)blenke.com> <icblenke(a)2c2.com>

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Re: [Zope] ZClass propertysheet: Selection/Multi selection/Token - how?
by Kam Cheung 17 Oct '99

17 Oct '99

> The problem: Some of the input fields are selection dropdown lists and > multiple-selection lists that represent fixed options. These options will > have spaces in them (killing a :token implementation). These options will > need to appended to in the future. The simpliest method -- Create a custom EditForm and Edit DTML method inside your ZClass. Then click your the "View" tab in your ZClass, assign a view to the EditForm (make it the first view, and preferably, remove the standard properties view as well). If you do that, when your users click on the ZClass's instance, they will be presented with your EditForm. Kam

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ZClass propertysheet: Selection/Multi selection/Token - how?
by Ian Blenke 16 Oct '99

16 Oct '99

Attempting to fight my way through a simple ZClass Product, I've run up against an apparently undocumented roadblock. The task: Implement a Zope Product ZClass for an Object that is merely an input form. The input forms will be thrown into a folder with ZCatalog/ZSearch to find previously entered forms. Simply put: let the user enter a pageful of form data and store it away for later retreival in a Folder. The problem: Some of the input fields are selection dropdown lists and multiple-selection lists that represent fixed options. These options will have spaces in them (killing a :token implementation). These options will need to appended to in the future. The idea: Create TinyTables as ZClass methods to enumerate the :list of items that are needed in the selection dropdown list. The attempt: Unsuccessful. No matter what I try to do, the propertysheet shows "No Value for fieldname" - or whatever I name the TinyTable to be. The working solution: Instead of using TinyTables, I can implement DTML Methods that merely return a list of options. For example, if you put the following inside a DTML method: <dtml-return "('This is the first option','This is the second option')"> you can reference the DTML method as the source variable for the selection/multi-selection variable name. But this isn't something I want to force upon the other adminstrators of the site. Perhaps the real question is "how do I efficiently manage lists of options for forms without resorting to SQL?" - Ian C. Blenke <ian(a)blenke.com> <icblenke(a)2c2.com>

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RE: [Zope] Authorisation problem (Answering my own question)
by Roché Compaan 16 Oct '99

16 Oct '99

> I created a form in Zope with which the user can easily update the product > list through a simple interface. I mainly used the content manager as > guidance in this effort. I run into an simple problem however. > > Following is the piece in the "builder" script that clones an existing > folder > > <dtml-with "manage_clone(MyFolderName,REQUEST['id'],REQUEST)"> > <dtml-comment> > <dtml-call "manage_changeProperties( > title=REQUEST['title'], > Code=REQUEST['Code'], > Material=REQUEST['Material'],)"> > </dtml-comment> > <dtml-call "thumbnail.manage_upload(REQUEST['thumbnail'])"> > </dtml-with> > > <dtml-call > "RESPONSE.redirect(DestinationURL()+'manage_main@update_menu=1')"> > > When I view the "designer" and submit my changes from the Designer form i > get an authentication error. Zope says that i am not authorized to > "manage_changeProperties". > I've checked my id's in my designer form and they match the id's > used in the > builder script. I am also logged in as a user with manager and > owner roles > and have no problem to change properties of folders in Zope itself. > > What could this be? > > Help appreciated. > > Roché Compaan Sorry, I eventually found my answer in the mailing lists: Kevin Dangoor writes, on 08/28: > If you don't want to log in to make the change, use a "Proxy Role" on the > DTML Method. You can set the proxy role to "Manager", and then that > particular method can do anything a Manager can do. Thanks Kevin Roché Compaan

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