March 2005 - Zope - Zope lists

Re: [Zope] Data Insert Problems
by Chris Withers 23 Mar '05

23 Mar '05

Hi Jay, Jay Zeemer wrote: > Our primary requirements for useing XUF is to allow external > authentication of users from a database?? Is there a better solution then > this?? If users from a relational database is all you want, then use SimpleUserFolder and follow the included docs ;-) (I have a newer unreleased version if you run into any problems, but you shouldn't) > Also, the app we would like to use Zope for is a very write itensive > application, Yes, but writing to what? What RDB are you using? > the problems we are seeing with Zope currently are that the > Data.fs is growing at a pretty decent size because the form appears to be > writting to the Data.fs first What evidence do you have to support this hypothesis? > being stored. Our estimates have us causing the Data.fs to grow by more > then 2 gigs per day. How often are you packing? Are you running ZEO? > Is there any possible way to increase the load that > Zope's Data.fs can handle, currently we are seeing about a 40% drop at 20 > concurrent users, over a few hours. 40% of what? relative to what? > Do you know of any way to ramp up the > number of connections that Data.fs can handle?? Why do you think you need to? ;-) cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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Re: [Zope] Query Keyword Index unexpected behavior
by Yuri 23 Mar '05

23 Mar '05

> > > Dieter Maurer wrote: > >>>>>should return objects that have both "foo" AND "bar". In my case, no objects >>>>>with "bar", but with "foo" a lot. The expr above returns ALL objects with >>>>>"foo". Is it expected behavior? >>> >>> >>> >>> A really long standing bug... >> >> > >Is there a collector entry for this? > >cheers, > >Chris > Dear Chris, this is an "already discussed issue" :) http://www.dzug.org/mailinglisten/zope-org-zope/archive/2003/2003-12/107070… > The ZCatalog treats an empty *string* in a special way to support[...] "AND"[...] I've solved it in /PluginIndexes/common/util.py. When the param is a record, around line 95, I've added: if keys == ['']: keys = None Is it correct? Seems to work with all indexes I've and KeywordIndexes, which works also with AND as operator. --- Note: you also have to use lines to use the KeywordIndex: <textarea name="COLL:lines"></textarea> That was my solution. I think the "ManagableIndex" with the KeywordIndex replacement should be added, maybe calling it KeywordIndexNG :)

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Re: Re: [Zope] tal:atrributes problem
by Jürgen Herrmann 23 Mar '05

23 Mar '05

[ Lennart Regebro wrote:] > On Wed, 23 Mar 2005 13:17:07 +0100 (CET), Jürgen Herrmann >> as far as i remeber the selected attribute should only contain >> 'selected' if you'd like to be xhtml compliant. >> >> but hey, if your version works with the standard browsers, i'll also go for this version, cause it's much more readable... > > Well, this code: > <option tal:repeat="statusid statuslist" > tal:attributes="value statusid; > selected python:status==statusid" > tal:content="statusid" /> > > results in this html: > > <option selected="selected" value="ACCEPTED">ACCEPTED</option> > > <option value="DECLINED">DECLINED</option> > <option value="TENTATIVE">TENTATIVE</option> > <option value="DELEGATED">DELEGATED</option> > > So it seems to be fine (For Zope 2.7.4 at least). looks fine! i thought it would produce something like : <option selected="True" value="ACCEPTED">ACCEPTED</option> ^^^^ though i had never tried it before... as i looked at TALInterpreter.py, obviously 'selected' is one of a handful of html attributes that get special treatment... line 33: BOOLEAN_HTML_ATTRS = [ # List of Boolean attributes in HTML that should be rendered in # minimized form (e.g. <img ismap> rather than <img ismap="">) # From http://www.w3.org/TR/xhtml1/#guidelines (C.10) # XXX The problem with this is that this is not valid XML and # can't be parsed back! "compact", "nowrap", "ismap", "declare", "noshade", "checked", "disabled", "readonly", "multiple", "selected", "noresize", "defer" ] regards, juergen herrmann _______________________________________________________________________ >> XLhost.de - eXperts in Linux hosting << Juergen Herrmann Weiherweg 10, 93051 Regensburg, Germany Fon: +49 (0)700 XLHOSTDE [0700 95467833] Fax: +49 (0)721 151 463027 ICQ: 27139974 - IRC: #XLhost@quakenet WEB: http://www.XLhost.de

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Re: Re: [Zope] tal:atrributes problem
by prabuddha ray 23 Mar '05

23 Mar '05

sir, i guess i'm not gettin it. kindly tell me the syntax. wats happeneing is dat its setting the last item as selected. where as i want the item matching the result from 'distname' var sud be selected only. kindly gimme the syntax if possible. On Wed, 23 Mar 2005 Jürgen Herrmann wrote : > >i succeeded in either setting the selected attribute to >"selected" >or "", hth > >juergen herrmann > >[ prabuddha ray wrote:] > > I've got to set the particular item selected in a dropdown >list > > which was in the request object.this is fetched by reloading >the > > page. > > > > i've a var 'distname' which holds wat has been selected > > > > <body tal:define="distname >request/form/districtname|nothing" > > onload="foc()"> > > > > wen i use this in my option tag of the list with the attribute >tag > > nothing happens. > > > > <option tal:content="district/district_name" > > tal:attributes="selected distname"></option> > > > > i guess coz the 'selected' attribute don take any values. > > so how do do it? > > > > _______________________________________________ > > Zope maillist - Zope(a)zope.org > > http://mail.zope.org/mailman/listinfo/zope > > ** No cross posts or HTML encoding! ** > > (Related lists - > > http://mail.zope.org/mailman/listinfo/zope-announce > > http://mail.zope.org/mailman/listinfo/zope-dev ) > >

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How can I give the authority of writing in a certain folder of my Zope to the Anonymous user?
by libsvm 23 Mar '05

23 Mar '05

Dear all, I want to Anonymous user could upload files to my Zope. How can't give the Anonymous user the writing authority in a certain folder. You suggestion will be appreciated. Denny

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Structured text / charsets
by Oliver Sturm 23 Mar '05

23 Mar '05

Hey, although there are lots of postings about charset problems with Structured Text, I haven't found an answer to my specific problem. I have that Zope installation where a large hierarchy of documents has been created over the course of three years. Back then I created a web interface that could be used by people in various European countries to edit content in structured text format, which is then rendered onto pages automatically. In my hierarchy of folders, I established a system that will automatically insert the correct page encoding in the page's header, depending on the country (ISO-8859-1 and ISO-8859-2 are in use). This works fine as far as the content is concerned. For some reason, nobody has ever noticed before that structured text doesn't work well in this scenario. Reading postings about charset problems with structured text, the solution usually involves setting the locale for the Zope instance to the correct value. The problem is, this Zope instance contains data in different charsets, so this doesn't seem to be the solution here. Is there any solution out there that would let me set the locale (as used by the structured text parser) on a folder basis? This is plain Zope 2.5.1 from Debian Stable. Oliver Sturm -- omnibus ex nihilo ducendis sufficit unum Spaces inserted to prevent google email destruction: MSN oliver @ sturmnet.org Jabber sturm @ amessage.de ICQ 27142619 http://www.sturmnet.org/blog

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tal:atrributes problem
by prabuddha ray 23 Mar '05

23 Mar '05

I've got to set the particular item selected in a dropdown list which was in the request object.this is fetched by reloading the page. i've a var 'distname' which holds wat has been selected <body tal:define="distname request/form/districtname|nothing" onload="foc()"> wen i use this in my option tag of the list with the attribute tag nothing happens. <option tal:content="district/district_name" tal:attributes="selected distname"></option> i guess coz the 'selected' attribute don take any values. so how do do it?

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An idea about the overhead of the security policy in Zope
by Yuri 23 Mar '05

23 Mar '05

http://www.livejournal.com/users/james_morris/2153.html *AVC operation and analysis* To understand this, here's a brief explanation of how the core of the SELinux code works. SELinux uses a series of hooks (via LSM) at strategic points within the kernel. These hooks are used to divert the normal flow of the kernel into a security checking mechanism called the Access Vector Cache (AVC). The AVC contains cached permission checks performed against the system's security policy. As the working set of permission checks for a given workload is typically quite small, having them cached allows SELinux to scale virtually independently to the size of the security policy. For the vast majority of cases, an SELinux permission check is a quick cache lookup rather than a search of the entire security policy database. [...] *Solution: RCU* A few attempts had been made at "fixing" or getting rid of the AVC lock, using reader/writer lock variants and per-cpu techniques. Neither worked very well. Kaigai's patch, however, utilized RCU <http://lse.sourceforge.net/locking/rcupdate.html>, a mechanism which allows lockless reads and the elimination of atomic operations in read paths. As the AVC is overwhelmingly read-only on a typical system, RCU turned out to be an ideal method for removing the AVC lock completely. (about RCU: Read-Copy Update is one such mutual exclusion method where readers (threads trying to access, but not modify the data) can access the shared data without acquiring any conventional lock.) --- Could a similar idea/approach ascache security lookups + Rcu similar thing be useful to Zope or "I'm totally missing the point? (tm)"? :)

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RE: [Zope] Zope page templates and access controls
by Matthew X. Economou 23 Mar '05

23 Mar '05

All, I did (finally) figure out that Plone workflow trumps Zope access control entries, so I am implementing a modified workflow (with additional states that re-implement the "visible" and "published" states with ACEs that require authenticated access). Further reading seems to indicate that I can call DTML or Python methods from a page template, so I will report back with the results of my research in a few days. I plan writing up the whole process as a mini-howto. Perhaps it could be included as a tutorial in a future release of Zope or Plone. Best wishes, Matthew -- "The challenge of a moral life is to do nothing that requires forgiveness." - Roger Ebert in his review of _The Woodsman_

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internal links?
by Erik Myllymaki 23 Mar '05

23 Mar '05

I am trying to use a simple internal link: <a href="#jump">jump to further down the page</a> . . . . <a name="jump">you should end up here</a> Zope wants to add a '/' to the end of the base link so I am using: <a href="<dtml-var URL1>#jump">jump to another part of page</a> instead but this wants to refresh the page before going to this section. Any help appreciated.

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