March 2000 - Zope-Dev

Tree-expand bug!?
by Petr Knapek 08 Mar '00

08 Mar '00

Hi Zopists, I have tried to expand tree and a Zope error has appeared. Below, you can see setting up of expand_all variable together with the beginning of my tree. The collapse_all is working without any problem, the tree collapses when the collapse_all is set up to '1'. The problem is only with the expand_all. Is it Zope bug or something wrong on my side? part of my code <A HREF="<dtml-var URL0>?expand_all=1"><IMG SRC="/p_/pl" ALT="Expand" BORDER="0"> <dtml-tree branches_expr="objectValues(['Folder', 'DTML Document', 'File', 'Image'])" skip_unauthorized=1 sort=is_sort_objects> Zope Error Zope has encountered an error while publishing this resource. Error Type: KeyError Error Value: branches Troubleshooting Suggestions This resource may be trying to reference a nonexistent object or variable branches. 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 /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/lib/zope/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 165, in publish File /usr/lib/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: is_tree_manage) File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: is_tree_manage) File /usr/lib/zope/lib/python/OFS/DTMLMethod.py, line 145, in __call__ (Object: is_tree_manage) File /usr/lib/zope/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: is_tree_manage) File /usr/lib/zope/lib/python/TreeDisplay/TreeTag.py, line 154, in render (Object: a tree tag) File /usr/lib/zope/lib/python/TreeDisplay/TreeTag.py, line 210, in tpRender (Object: ElementWithAttributes) KeyError: (see above) Thank you, Petr -- Petr Knápek PVT.NET, e-mail: petr.knapek(a)pvt.net, tel:+420-5-41 558 394 PVT a.s. - pvt.net, Veveří 102, 659 10 Brno, Czech Republic

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Use of HTTP_ACCEPT_LANGUAGE in Zope
by Sin Hang Kin 08 Mar '00

08 Mar '00

I am making a new head zope index_html file, I think it is now about time to make use of the HTTP_ACCEPT_LANGUAGE which is sent by the browser to indicate the perferred language. The variable is a string like: lang1, lang2;q=p1,lang3;q=p2.... while lang1, lang2, lang3 is the perferenced languages. I have think of the following ways to make such brenches in zope: 1. by setting the lang variable in the REQUEST 2. by transfer to the brench of lang/ 3. brench calls of index_lang What will be the perferred way to make such a brench? I want to hear from all. In building the brench code : I have come up with the code: <dtml-in "_.string.split(HTTP_ACCEPT_LANGUAGE, ',')"> .....do thing according to sequence-item </dtml-in> but on the second argument, the sequence-item may contain ;q=0.5 which need to be trancated. How can I trancated that in dtml? Rgs, Kent Sin

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Use of HTTP_ACCEPT_LANGUAGE in Zope
by Sin Hang Kin 08 Mar '00

08 Mar '00

I am making a new head zope index_html file, I think it is now about time to make use of the HTTP_ACCEPT_LANGUAGE which is sent by the browser to indicate the perferred language. The variable is a string like: lang1, lang2;q=p1,lang3;q=p2.... while lang1, lang2, lang3 is the perferenced languages. I have think of the following ways to make such brenches in zope: 1. by setting the lang variable in the REQUEST 2. by transfer to the brench of lang/ 3. brench calls of index_lang What will be the perferred way to make such a brench? I want to hear from all. In building the brench code : I have come up with the code: <dtml-in "_.string.split(HTTP_ACCEPT_LANGUAGE, ',')"> .....do thing according to sequence-item </dtml-in> but on the second argument, the sequence-item may contain ;q=0.5 which need to be trancated. How can I trancated that in dtml? Rgs, Kent Sin

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index_html for root
by Sin Hang Kin 08 Mar '00

08 Mar '00

The attached file is intended to replace the current architecture of header body footer of current zope default index_html. Together there will be some attributes which can be used to modify its behaviors : wap - when defined, set the content-type in RESPONSE accordingly according to Ducan's WAP howto. and sent out the <wml></wml> tag. xml - when defined, set the content-type to xml/plaintext and the xml header frame - when defined, prevent sent out the body tag Only one of the above can be set. I still got problem with acquisition: if one of these is set in a higher lever, then all lowerlevel see it. Are there any easy way to set them off? doctype - when defined, should contain the correct doctype string: currently the following doctype is available: html4.0 htmlstrict4.0 htmltransistional4.0 htmlstrict4.01 htmltransitional4.01 htmlframe4.0 htmlframe4.01 xml1.0 xhtml1.0 The following is defined inside the index_html: dtml-head - the content of the <head></head> section dtml-headers - the content of contructs before the main body: This should not left any tag open. dtml-footers - the closing contents of the main body. There should not assume any opening tags. index_htm - the main content. a frameset statement if frame is defined. If the main content contains a table, then the main table is defined here, the parts in the table can then be dtml-var. A index1 index2 .... or indexr1c1 index r1c2 .... naming convention is suggested. I strongly suggest convert the current zope sites to adapt to this style through much works shall be needed. Further work would be in the dtm-head: Recently I will suggest to adapt the W3C core styles : http://www.w3.org/StyleSheets/Core/Overview All suggestion and comments are welcome. The index_html is below: ---------------------------------------------------------------------------- ------------------ <dtml-if wap> <dtml-if "HTTP_USER_AGENT[:7]!='Mozilla'"> <?xml version="1.0"?> <!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">  <wml> <dtml-var index_htm missing> </wml> <dtml-call "RESPONSE.setHeader('Content-Type', 'text/vnd.wap.wml')"> <dtml-else> <?xml version="1.0"?> <!DOCTYPE HTML SYSTEM "html40-mobile.dtd"> <html> <head> <dtml-var dtml-head missing> </head> <body> <dtml-var dtml-headers missing> <dtml-var index_htm missing> <dtml-var dtml-footers missing> </body> <dtml-call "RESPONSE.setHeader('Content-Type', 'text/plain')"> </html> </dtml-if> <dtml-elif xml> <dtml-call "RESPONSE.setHeader('Content-Type', 'text/xml')"> <dtml-if doctype> <dtml-var doctype> <dtml-else> <?xml version="1.0" encoding="utf-8"?> </dtml-if> <dtml-var index_htm missing="<xmlstring>Document Not Found</xmlstring>"> <dtml-elif frame> <dtml-if doctype> <dtml-var doctype> <dtml-else> <!DOCTYPE HTML> </dtml-if> <dtml-var index_htm missing> <dtml-else> <dtml-if doctype> <dtml-var doctype> <dtml-else> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> </dtml-if> <html> <head> <dtml-var dtml-head missing> </head> <body> <dtml-var dtml-headers missing> <dtml-var index_htm missing> <dtml-var dtml-footers missing> </body> </html> </dtml-if>

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Why is ZEvent not ZClass subclassable?
by Loren Stafford 07 Mar '00

07 Mar '00

I want the ZEvent class of ZScheduler to be subclassable by ZClasses. I think I did everything specified in http://www.zope.org/Documentation/Guides/ZDG-HTML/ZDG.6.3.11.html to make a subclassable class (i.e. registered it with registerBaseClass()). However when I tried to make a ZClass, ZEvent was not in the list of base classes. What else do I need to do? -- Thanks -- Loren

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Bug in Medusa / ZServer?
by Alexander Limi 07 Mar '00

07 Mar '00

Hi. After ranting off in this list yesterday (Subject: Problem uploading large files), I did some more sleuthing. This is what I get to the console when I upload a large file to Zope in debug mode: 2000-03-07T20:55:16 ERROR(200) ZServer uncaptured python exception, closing channel <zhttp_channel connected 212.71.72.22:19518 at 606880 channel#: 21 requests:1> (exceptions.AttributeError:data [/opt/zope-mp3/ZServer/medusa/asyncore.py|poll|59] [/opt/zope-mp3/ZServer/medusa/asyncore.py|handle_read_event|291] [/opt/zope-mp3/ZServer/medusa/asynchat.py|handle_read|103] [/opt/zope-mp3/ZServer/medusa/http_server.py|collect_incoming_data|435] [/opt/zope-mp3/ZServer/medusa/http_server.py|collect_incoming_data|143] [/opt/zope-mp3/ZServer/HTTPServer.py|collect_incoming_data|300]) Is this a bug in Medusa or ZServer? Regards, Alexander Limi

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Zope Object Tree Transformations and XSL
by Josh Zeidner 07 Mar '00

07 Mar '00

Hello everyone, Currently we are facing a problem with a Zope-based application where we need to be able to *view* a tree of ZObjects as another tree of ZObjects with an entirely different structure. If these objects were XML elements I could use XSL- however, they are not. We also need to have any changes in the original structure automatically be reflected in the representation of the "phantom" structure. So what I am asking is... is there any way to define such a tree transformation of instantiated ZObjects? Has anyone worked with any problem related to this? Are there any products or tools that would make such a transformation easier? Any comments? -thanks in advance, Josh Zeidner ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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urg
by Tom Deprez 07 Mar '00

07 Mar '00

Damn, I'm loosing my faith in Zope. I'm already 3 days trying to find a solution, but I'm still at the same place as I was 3 days ago. This isn't funny anymore. You're my last resort, I hope someone can help. I'm trying to create a ZClass which updates some properties when it is added or moved. Now, people pointed me to the manage_afterAdd method. And indeed, when I use this code (as an external method) : def manage_afterAdd(self,item,container) item.myparent=container.id return it works when I don't have a class which inherits from CatalogAware Class. However, it doesn't works with a class inherited from CatalogAware Class. Probably because the manage_afterAdd method is defined in the CatalogAware Class. So I tried to modify the external method to : def manage_afterAdd(self,item,container) item.myparent=container.id CatalogAware.manage_afterAdd(self,item,container) return But then I get following error when adding an instance of the new class : Zope Error Zope has encountered an error while publishing this resource. Error Type: NameError Error Value: CatalogAware Troubleshooting Suggestions This resource may be trying to reference a nonexistent object or variable CatalogAware. 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. Urgh, I'm really desperate. Do you know what I'm doing wrong? ps. Why does this function has to be an external method? Is it also possible with an DTML method? Regards, Tom.

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Re: [Zope-dev] Pointer or reference object
by Jason Spisak 07 Mar '00

07 Mar '00

Very interesting. Sounds possible. Hopefully they would have the same id, because they stand for the same object. Thanks for all of the the responses. All my best, Itamar Shtull-Trauring writes: > Jason Spisak wrote: > > > Sort of like a filesystems hard link. When all references to a file are > > gone, then it's deleted. I like that approach. Can we use Python's object > > reference with Zope? > > In theory yes - a programmer who works with me stored a reference to an > object in a property, deleted the object - and the property still pointed at > the object. She did that by mistake - it was a bug, which she since fixed, > but I guess that means it is possible. If it's a good idea I don't know - > there's issues with circular references and so on that may be problematic, > plus both objects must have the same id. Hopefully someone more > knowledgable than I will say something on the list. > > -- > Itamar S.T. itamars(a)ibm.net Jason Spisak CIO HireTechs.com 6151 West Century Boulevard Suite 900 Los Angeles, CA 90045 P. 310.665.3444 F. 310.665.3544 Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.

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Publisher and callable objects
by cpita 07 Mar '00

07 Mar '00

Hi, I'm a very new Zope-Python programmer but I have been reading many tutorials, references and howtos since last month. Last night I was spying the DocumentTemplate package, and in the String module I found some code that was intended to make the DT appear as a function to the Publisher. I can't exactly remember, but the idea was to add a func_code attribute with no bytecode and requesting the 2 arguments REQUEST and self. So, implementing the special __call__ method, Publisher calls the DT as it would call a function expecting those arguments. I get the idea, but what I can't see is: Is this clean? I mean, if the Publisher is assuming that the DT is really a function it could try to access other functionality function objects have. Is it stated somewhere that Publisher (once it knows that it's working with a callable object) only uses the func_code attributed and the subattributes that DT sets? Or that Publisher will not depend on the type of the callable object being FunctionType, MethodType, etc?. Thank you, Carlos _________________________________________________________________ UOLMAIL - Todo Argentino tiene derecho a tener su e-mail. http://www.uolmail.com.ar

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