- Zope - Zope lists

Re: [Zope] lateral aquisition
by Hung Jung Lu 09 Mar '00

09 Mar '00

chris withers <chris-(a)nipltd.com> wrote: ><dtml-var "parents[1].test2.index_html"> >... ><dtml-var "parents[0].test2.index_html"> I believe you have to supply the (_.None, _) parameter for the index_html method to work. You are ALMOST ALWAYS better off using the <dtml-with ...> tag, something like <dtml-with test2> <dtml-var a_something_inside_test2> </dtml-with> Or in the more general case of many layers <dtml-with "FolderA.SubFolderB.SubSubFolderC.test2"> <dtml-var methodA> </dtml-with> This pushes test2 onto the namespace stack. So your methodA can still access objects inside the SubSubFolderC. ------------------------------------------------ Use the dotted notation, e.g: <dtml-var "F1.SF2.methodA(_.None, _)"> only if you don't need any objects from the subfolder F1.SF2 during the call. Most of the times, this is not what you want. ------------------------------------------------ Hung Jung ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

2 1

Having slight problems with <dtml-calendar>
by M.J. Stahl 09 Mar '00

09 Mar '00

Problem: Currently I have no problem view the HTML tables of the calendar or adding properities. Where my problem lies is displaying those properties in the tables of the calendar. Currently the variables for the date, whether the object has a property, and the value of that property are registed just like the <dtml-calendar> How-to. <dtml-let d="date.Date()" hasdate="hasProperty(d)" dprop="getProperty(d)"> The 'd="date.Date()"' does what it is supposed to. (make d equal to something like 2000/01/17). I checked the hasdate variable and found that it was equal to a 0 (1 if true, 0 if false, of course). The properties are kept on the folder, where the calendar method is. I added a property via the method for doing such and went back and checked the folder to see if it had a property on it. Yes it did... in this format. Tree Structure: /diis /calendar (contains the properties) index_html (displays the calendar) /updatecalendar index_html (used for editing the properties) 2000/01/17 This is the 17th day of January. Yet, hasdate was equally 0 (false) therefore the 'dprop' value could not be set. I guess my question is this: If the folder containing the calendar method has properties on it which are to be read into the tables of the calendar, does this mean that 'hasProperty(d)' is not being read off the folder and is looking at some other object for the value? If that is not the question can someone please point something out to me that I am doing wrong... All help is extremly appreciated. Best regards, Mark J. Stahl

1 0

Re: [Zope] workflow question
by Rik Hoekstra 09 Mar '00

09 Mar '00

Is there any way in Zope to validate information (news, new document) by third party before real publishing. For example some people are alowed to put a document in the folder but these documents must be validate by some one else for real publishing. How can I do this kind of things with Zope? Is it possible? Any suggestion? links? help? [RH] There are several ways to accomplish this: You could put the document in an 'incoming' folder and make a reviewer move it to the publishing location (this also allows for letting the reviewer add keywords/categories etc). If the uploaded document goes directly to the documentation where it is published, you could give it a property called 'approved'; reviewer invokes dtml method which sets the approved property to 1. The document is not shown unless the ' approved' == 1. [untested simplistic dtml] <dtml-unless "approved==0"> <dtml-var <document>> </dtml-unless> I believe the Squishdot product (http://www.zope.org/Members/butchland/Squishdot) allows for something like this. A third (more sophisticated) possibility is to combine the two approaches by using the Catalog, more or less like the Zope site does: contributions by members are submitted for approval to the Zope site administrators, who then add them to the site's catalog. Then they are available in pages that use the catalog for their contents (like the howto pages, the products pages etc). In your case reviewers could also add keywords/categories etc to the document before it is cataloged and the catalog may index these. I do not think the Zope site approach is available for the public, but it shouldn't be too difficult to implement it. A related product is ZDP tools (http://www.zope.org/Members/roeder) which does not exactly do this but may be a source of inspiration for workflow management. Another workflow system in Zope is Xen (I do not have the URL handy right now), but this may be overkill for your needs. hth Rik

2 1

Passing arguments to DTMLMethods
by James W. Howe 09 Mar '00

09 Mar '00

I know that there have been several threads on this list concerning the way to pass arguments to a DTMLMethod. I've done what I think is correct, yet my result is less than pleasing. Here's what I have and what I'm doing. Hopefully someone will identify what I'm doing wrong. In my web sites root folder (aka /Foo), I have a DTMLMethod named "siteRoot". It simply answers "Foo". In a subfolder of Foo, I have a method named "linkFor". The code for this method looks like this: /<dtml-var siteRoot>/SomePage?option=<dtml-var optionValue> In the same folder that contains the "linkFor" method, I have another method which wants to use the result of the "linkFor" method. In this method there is a line which looks like this: <a href="<dtml-var "linkFor(_, _.None, optionValue='some value')">">Some Text</a> When this code gets executed, I get a "KeyError" on "siteRoot". For some reason, when my linkFor method executes, it can't see the siteRoot method, even though the method exists in the parent folder. What am I doing wrong? Why can't linkFor see siteRoot? Thanks. James W. Howe mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103

2 1

workflow question
by Marc Danai 09 Mar '00

09 Mar '00

Hi, Is there any way in Zope to validate information (news, new document) by third party before real publishing. For example some people are alowed to put a document in the folder but these documents must be validate by some one else for real publishing. How can I do this kind of things with Zope? Is it possible? Any suggestion? links? help? kindly, __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

2 1

Representing lines as one string
by Kiran Jonnalagadda 09 Mar '00

09 Mar '00

Hi, When I have a form with a <textarea> field set to submit to an sql method, ['it gets stored','like this']. How do I get around this? Do I have to do some special formatting before submitting to the SQL method, or is there something I must do in the SQL method declaration itself? I'm using <dtml-sqlvar fieldname type=string> because this was the best I could find in the documentation. Is there a type=lines? If there is, someone please put it in the ZQR. Another: I want a text holding ZClass for storing text pages. Deriving from DTML Document or Method seems the obvious choice but I have an issue with that: the content must be rendered thus: <dtml-var standard_html_header> <dtml-var raw newline_to_br> <dtml-var standard_html_footer> I suppose I have to override rendering for my ZClass and insert this code. How do I do this? -- Kiran Jonnalagadda http://lunateks.com baby.sh: while true; do echo "^G^G^G^G^G"; sed -e 's/food/poop/'; sync; sync; sleep 15; done

1 0

Disabling Undo
by Ricardo 09 Mar '00

09 Mar '00

Hi, How I can disable the Undo in Zope? I have one Forum in Zope, but my Data.fs stays with 500Mb every day. Than i have 2 options: One is Pack, 4 or 5 times a day... or i disable Undo. Then i can stay with 100~150Mb. Can anyone help me? -- Ricardo Guimarães ricardo(a)conectiva.com.br http://ldp-br.conectiva.com.br

2 1

error adding property of type lines in root-folder
by Nico Grubert 09 Mar '00

09 Mar '00

hello, i am adding a property "colors" of type lines with empty value in root-directory. okay this works fine, but if i enter some values in the textarea for this property and i click "save changes" i get this error: *************************************************************** Zope Error Zope has encountered an error while publishing this resource. Error Type: TypeError Error Value: string member test needs char left operand -------------------------------------------------------------------------------- Troubleshooting Suggestions The URL may be incorrect. The parameters passed to this resource may be incorrect. A resource that this resource relies on may be encountering an error. For more detailed information about the error, please refer to the HTML source for this page. If the error persists please contact the site maintainer. Thank you for your patience. Traceback (innermost last): File C:\Program Files\ZOPE\lib\python\ZPublisher\Publish.py, line 214, in publish_module File C:\Program Files\ZOPE\lib\python\ZPublisher\Publish.py, line 179, in publish File C:\Program Files\ZOPE\lib\python\Zope\__init__.py, line 202, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File C:\Program Files\ZOPE\lib\python\ZPublisher\Publish.py, line 165, in publish File C:\Program Files\ZOPE\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: manage_propertiesForm) File C:\Program Files\ZOPE\lib\python\ZPublisher\Publish.py, line 102, in call_object (Object: manage_propertiesForm) File C:\Program Files\ZOPE\lib\python\App\special_dtml.py, line 120, in __call__ (Object: manage_propertiesForm) (Info: C:\Program Files\ZOPE\lib\python\OFS/properties.dtml) File C:\Program Files\ZOPE\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: manage_propertiesForm) File C:\Program Files\ZOPE\lib\python\DocumentTemplate\DT_In.py, line 691, in renderwob (Object: propertyMap) File C:\Program Files\ZOPE\lib\python\DocumentTemplate\DT_In.py, line 691, in renderwob (Object: _[select_variable]) File C:\Program Files\ZOPE\lib\python\DocumentTemplate\DT_Util.py, line 335, in eval (Object: _['sequence-item'] in getProperty(id)) (Info: getProperty) File <string>, line 0, in ? TypeError: (see above) ************************************* what is going wrong right here ??? thanks in advance cheers, nico

3 2

WorldPilot IMAP/SMTP settings (was: Re: Re: [Zope] Worldpilot/Python help)
by WorldPilot Helpers 09 Mar '00

09 Mar '00

Hi Matt, Hi Jack, What were your IMAP/SMTP settings prior to setting them to localhost? Were they empty or pointing to a specific host name? Cheers, Ryan > Hi Matt! > > I ran into this same problem. I finally traced it to a problem in the IMAP and > SMTP server options set in the setup screen. It seems to work best when these > are explicitly set to localhost and localhost. I'm not sure why but that's how > I got it to stop giving me that particular error. Unfortunately it will require > removing the current WorldPilot object and replacing it with a new one since > those parameters are not visible on the parameter tab of the object. > > Good Luck! > -- > Jack Ungerleider > The Ungerleider Group > Creative Solutions for Cooperative Computing > jack(a)jacku.com > www.jacku.com > > On Sat, 04 Mar 2000, Matt Welch wrote: > > I was very comfortable in my cozy PHP/MySQL world, until I saw Worldpilot. > > I HAD to finally break down and > > install Zope so I could have this. Needless to say, my python/Zope skills > > are a little lacking at this point. I could > > use some help. > > > > Everything is installed and working great, except for a couple small > > problems with Worldpilot. I'll detail the most > > significant first, and see how we do. > > > > When I try to send mail, I get a Zope error with the following traceback: > > > >  > > > > The problem is obviously (to me anyway) that the call to publish in the def > > publish_module > > (response s only > > getting one > > argument instead of four. > > > > I'm not sure I understand why, as this is a bit beyond my current > > comprehension of python at the moment. > > A gentle push in the right direction would be appreciated. > > > > Thanks, > > Matt > > > > > > _______________________________________________ > > 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 ) > > > _______________________________________________ > 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 ) > > --------------------------------------------------- WorldPilot - Get Synced - http://www.worldpilot.org The Open Source Personal Information Manager Server Powered by Python and Zope - http://www.zope.org

3 2

RE: [Zope] Zope needs this (and Dynamo has it)
by Alexander Staubo 09 Mar '00

09 Mar '00

> From: Martijn Faassen [mailto:faassen@vet.uu.nl] > Sent: Tuesday, March 07, 2000 10:40 PM > To: Zope Mailing List (E-mail) > Subject: Re: [Zope] Zope needs this (and Dynamo has it) > > > Alexander Staubo wrote: > > I definitely believe that Python is Zope's largest problem > right now. > > It's also, from a technical point of view, one of it's > biggest assets -- > > Zope is becoming the killer application of Python, and > might eventually > > become the driving force to evolve Python, which is, I believe, > > suffering from draught into the contributor department. Skilled > > developers aren't flocking to Python to make it faster. Not > right now, > > anyway. > > Hm, skilled developers do hack on Python! There's the Python people at > CRNI, there's Christian Tismer in Germany doing Stackless > Python (which > offers interesting arcane features and a mild performance > improvements), > there's the whole JPython group, there's John Skaller with his Vyper > project (a Python interpreter/compiler in Ocaml, one of the reasons > is more speed). Then there's the Python Types-SIG, which I urge you to > look at if you haven't already. People are indeed working on Python, but not to the extent of more popular projects like Linux or even, I believe, Perl. Compiler/language projects have, historically, not thrived in the collaborative world of open source software -- for very specific reasons inherent in the concept itself of languages and compilers. Still, I'm very impressed with the evolution of next-gen GCC (formerly EGCS). I consider Skaller's Vyper project a fringe project with limited applicability, because Ocaml itself is a fringe project -- it's certainly not what you might call a mainstream, popular language. There's something icky about an OcamlPython. However, I'd love for it to succeed. (Unfortunately, Skaller is already out on a limb, implementing all sorts of stuff he deems interesting -- so true CPython compliance isn't necessarily on his agenda, and fragmenting Python like this is, imho, not a good thing.) Anyway, while I have not been monitoring the Python type/interface SIG, it seems to be moving quite slowly. > > My hope is that Zope will change this, because Python has > possibly one > > of the slowest interpreters on earth. Python zealots -- and there is > > such a beast -- will tell you that Python's performance is less of a > > matter because what you sacrifice in speed you gain in power, ie. > > computational expressiveness through a high-level, dynamic language. > > It is _less_ of a problem, but most Pythoneers are indeed > interested in > speeding of the language. I haven't heard of zealots who want to hold > back speedups, as long as it doesn't do away with the power. I'm not saying they're holding back, but rather they're dismissing speed and scalability as being a problem. I firmly believe that speed is Python's number of problem today, and it's keeping Python from being used in more applications. Python has plenty of problems, but they're tiny by comparison and imho they're mostly artifacts of Python's currently somewhat anemic syntax (eg., only two kinds of loops, no "switch", no protected members, no constants, no syntax for declaring mutability). Imho Python's second big problem is what you might call, in lack of a better term (I'm not wearing my compiler-writer hat right now, sorry), contractual semantics -- anything from static typing (pass a string to a function that takes an int and you get either a compilation error or an exception) to interfaces (the ability to enforce semantic compatibility) to design-by-contract constructs. > > For an example of a good, Python-like, dynamic language that is also > > very fast, take a look at Dylan. In current > implementations, Dylan is > > not interpreted but rather compiled to native code, but in > theory there > > is nothing stopping anyone from writing a highly efficient Dylan > > interpreter. Dylan's magic comes from its use of type > hints, a system > > which I had recognized as likely pivotal to improving Python's > > interpreter long before I knew of Dylan. > > It'll be pretty difficult to make a beast like Zope exploit > type-hints, though, > I think. I disagree, but there's only one way to find out -- implement it (or simulate it very carefully). >By the way, the Types-SIG is working on type > extensions to Python, > partially for performance (OPT), partially for better error > checking (ERR) > and partially for better documentation (DOC). See: > > http://www.python.org/sigs/types-sig/ > > And also see the new compiler SIG: > > http://www.python.org/sigs/compiler-sig/ Very interesting, thanks. > > Just imagine -- while Zope is running, thousands and > thousands of the > > same little checks are performed continuously, over and over again, > > amounting to no uncertain overhead. > > That's of course true. I heard Christian Tismer talk about making a > register machine interpreter for Python, which could potentially speed > things up quite a bit. I shall ask him about this idea again > sometime. :) Not potentially. Definitely. I thought about this yesterday, and I got to thinking that it would probably be pretty simple to create a dynamic native-code generator that translated bits of bytecode on-the-fly, with the necessary stubs implemented in a small helper-assembler written in C. Something like: def Halibut(): ... import codegen c = codegen.Translate(Halibut) c() # Call native-code function Halibut and then with whole modules: import pickle, codegen pickle = codegen.Translate(pickle) Internally, Translate() would disassemble the bytecode, generating native assembly language code and pass it to the helper C module, which would store it in an executable buffer and fix up the necessary references to the Py* API symbols. Just a thought. It would be an interim solution for certain CPU-intensive modules, in anticipation of such built-in functionality in CPython itself. Possibly. > > Python's biggest overhead comes from its dynamism -- the > dynamic typing, > > as explained, combined the object allocation system: most > things is an > > object, so a lot of objects are constantly spawned and torn > down, often > > in rapid succession because the compiler/interpreter can > make few hard > > analyses of when stuff is needed. Python also has a high > function-call > > overhead. > > All true. Anyway, the only thing you're wrong about is that > Pythoneers aren't > interested in improving performance. They are, but I grant > you they're not > performance nuts like users of C or C++. :) Well, I guess they're too busy arguing about whether Python should allow assignments as expressions so you could do "while line = f.readline():". ;-) > > Regards, > > Martijn > -- Alexander Staubo http://alex.mop.no/ "Do not go gentle into that good night/old age should rave and burn against the close of day/Rage, rage against the dying of the light." --Dylan Thomas

2 1