March 2003 - Zope - Zope lists

error in addZSQLMethod.
by Santoshi Reddy 01 Apr '03

01 Apr '03

Hi Folks, I am trying to add zsql method using python script.I have written the following. context.manage_addZSQLMethod('selectname', title='selectname', connection_id='Oracle_database_connection', arguments='PROF_ID,firstname,middlename,lastname,email,linktowebpage,degree,officenumber,telephonenumber', template='Select firstname from Professor') The error that i get is an attribute error.Can someone tell me how to fix it. Also if anyone has come across a tutorial on using zope API where u can add new products using python,please send me the URL. Thanks, S.

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Re: [Zope] Zope performance documentation
by Gilles 31 Mar '03

31 Mar '03

Hello > alone (..., no Apache)? No: don't do this, use Apache in from of zope, or your system will halt very often; don't ask me why... Gilles ----- Original Message ----- From: "Fabio Rolando" <ziofunk(a)tiscali.it> To: <zope(a)zope.org> Sent: Monday, March 31, 2003 8:57 AM Subject: Re: [Zope] Zope performance documentation > > > > > First of all thank you a lot for you attention. > I'm quite new to Zope so it is still difficoult to understand how it will > work when the system will be deployed. > We need to size the system for (all values are the absolute maximumwe > expect) 10.000 authenticated users, 10.000 documents (5000 pdf with 200 Kb > average size, and 500 html), 1000 hits/minute. Do you think we can use Zope > alone (no ZEO, no Apache)? > Does the server's hardware need to carry anything special? > Thank you. > > > > > >> Hardware is up to you and what you need. You can run it on almost > > >> anything, but if you are going to run http://www.cbsnewyork.com you > > >> will > > >> need more (I think I read that all the sites combined in that Zope > > >> installation run on 48 dual proc linux boxes). > > > > > > that's way off (it's less). maybe i'll ask the boss-man today to see if > > > i am allowed to publish some real figures in a document somewhere. > > > > > > jens > > > > > > > > > _______________________________________________ > > > 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 ) > > > > > > > > >_______________________________________________ > >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 ) > > > _______________________________________________ > 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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RE: [Zope] Detecting Mozilla based browsers
by Passin, Tom 31 Mar '03

31 Mar '03

[Gilles Lenfant] > I'm trying to detect (server side) Mozilla+Midas compatible browsers. > Since this feature (Midas) is new, finding "Gecko" in the user agent > signature doesn't seem to be enough. > > Any clue ? Does it need a Javascript helper ? > IE does not use the name "cssRules" as per the DOM Rec, while Moz does. You can discover this somewhat as follows - var stylesheet=document.styleSheets[0] var rules=stylesheet.rules var UA if (rules) { // Must be IE UA = 'IE' } else { rules = stylesheet.cssRules if (rules) { // Correct DOM name - probably Moz UA = 'Moz' } } For this to work, there must be a css stylesheet in the document, or document.stylesSheets[0] will fail. Now it may happen that some other browser would pass this test, so you would want to try several such tests. One possibility is the XMLHTTPREQUEST object, which exists in both browsers but gets instantiated differently - see http://jibbering.com/2002/4/httprequest.html Cheers, Tom P

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pb upgrading Zope 2.5.0 -> 2.6.1
by Nicolas LAURANCE 31 Mar '03

31 Mar '03

hello all, question 1 : here is my situation : I have developped a website under zope 2.5.0, mostly w/ dtml a python scripts. It is based on zclass defined in products (not external products) 3 of them were imported without pbs under Zope 2.6.1, but one of them (that has nothing special), when I import it raises : Error Type: ImportError Error Value: No module named iclass but I didn't define any iclass, it must be internal to Zope. How can I handle this ? If i rewrite the product under Zope 2.6.1, what should I do fot it to be able to handle mt ols instances ? reuse the same class id ? any pointer appreciated. question 2: when i import folders, the bobobase_modification_time of all the objects is reset to the date of importation. how can I keep this date unchanged when importing ? thank you for your answers zopers.

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Making transactions un-undoable ?
by Thierry FLORAC 31 Mar '03

31 Mar '03

Hi, I have a Zope site which interacts with a relational database (PostgreSQL). My obvious problem is that when some transactions are undone, concerned Zope objects are not synchronized anymore with the database, as SQL commands can't be undone. My question is : is there any way to make a specific transaction not undoable (without using a specific storage which may prohibit undo) ?? Thanks, Thierry -- Linux every day, keeps Dr Watson away... http://gpc.sourceforge.net -- http://www.ulthar.net

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ZCTextIndex Lexicon
by volker.wend＠efgbsh.de 31 Mar '03

31 Mar '03

He folks, I somehow have a screwed up Zope Installation... I cannot create a ZCTextIndex Lexicon in a subfolder but I can create the lexikon in other folders on the same level. What did I do ? Thanks, Volker

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Zope performance documentation
by Fabio Rolando 31 Mar '03

31 Mar '03

Hi. Does anybody know where I can found information about the performance of Zope as a web server? I mean, information like: number of documents that Zope can store and serve, max. access rate, max. users rate, hardware requirements, etc. Thank you in advance.

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CorruptedDataError
by Jorg E. Rødsjø 31 Mar '03

31 Mar '03

I am running a number of squishdot sites for a university class, and I have problems. The this is that someone has probably done something wrong in their blog, and when I try to access the squishdot site I get the following error: [yes, I know zope is installed in a less than perfect directory, but the story is long] 2003-03-31T16:11:51 ERROR(200) ZODB Couldn't load state for '\x00\x00\x00\x00\x00\x00\xd9\xec' Traceback (innermost last): File /home/zope/zope261/Zope-2.6.1-linux2-x86/lib/python/ZODB/Connection.py, line 509, in setstate File /home/zope/zope261/Zope-2.6.1-linux2-x86/lib/python/ZODB/FileStorage.py, line 650, in load (Object: /home/zope/zope261/Zope-2.6.1-linux2-x86/var/Data.fs) File /home/zope/zope261/Zope-2.6.1-linux2-x86/lib/python/ZODB/FileStorage.py, line 630, in _load (Object: /home/zope/zope261/Zope-2.6.1-linux2-x86/var/Data.fs) CorruptedDataError: I have been in touch with squishdot support, but they said it was not likely something squshdot related. Does anyone have any idea what I can do? I cannot access the folder containing the squshdots either - the same error pops up. regards Jorg Rødsjø

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ZCatalog performance issues - catalogging objects takes ages
by Wankyu Choi 31 Mar '03

31 Mar '03

Dear All, May I have your expertise on this? ;-) As much as I'm new to Zope/Python, ZCatalog (Catalog) internals vex me even more. I have a message board product called NeoBoard, some of you might know. Recently I rewrote its core to have a built-in catalog for indexing articles and displaying them automatically sorted on thread keys. It showed quite a boost in performance. Previous versions without the built-in catalog used to ramrod all article objects into/out of memory whenever they need to display them. What a waste of memory and CPU power as Toby Dickenson suggested. Here's what I did to solve this problem: - Rewrote the parent class of the NeoBoard/NeoBoardArticle ( article container/article objects themselves ), NeoPortalElementContainer to inherit ZCatalog. Basically NeoPortalElementContainer automatically natural sorts/numbers objects (elements) when they're added to the container: page_1, page_2, ... etc. - NeoBoardArticle looks toward NeoBoard when the catalog methods defined in NeoPortalElementContaier are called. So NeoBoard's catalog methods are always used no matter whereever you are in the path hierarchy. - When you call a NeoBoard instance, it calls ZCatalog's searchResults(), which returns brains objects. A threaded (expanded) look does require a step further: NeoBoard sorts a pageful of threads and their replies before returning them; it doesn't care about the other threads that are not displayed in the current request. Performance? Not so fast as SQL-backed PHP version ( displaying a pageful of threads takes only a fraction of a second ), but not bad. Okay, I partially solved one problem ( wasting memory/horsepower, etc - I'm still not satisfied with the performance, though ) but created another set of problems while so doing. I could display 5,000 threads ( about 20,000 article obects incuding all replies to the threads) in less than a second ( it takes a bit more when you load the board for the first time. ) The problems are... - It takes ages when cataloging even a small number of articles. 18 seconds for cataloging 50 or so article objects with so little to index? Is it normal? Can't imagine recataloging 20,000 objects. For example, if you move a thread from one NeoBoard instance to another, you have to uncatalog the thread including all its replies in NeoBoad A and catalog them in NeoBoard B: cataloging a single article object takes more than 1 second. Don't think it's normal... Or is it? - When I attempt to uncatalog an object that's not been catalogged, Zope spews out errors in the log. Can I supress the errors in code, which, in my applications, are meaningless. - Catalogs sometimes do get corrupted so recatalogging is required from time to time. Is it also normal? All of my article objects are catalog-aware and they catalog/uncatalog/recatalog themselves when getting added, deleted, or modified using manage_afterAdd(), manage_beforeDelete() and CMF'ish _edit() method. When a missing article (ghost catalog entry) causes a KeyError, NeoBoard attempts to refresh the catalog: well, takes too much time. But manually recreating its catalog is not an alternative. Any ideas why this'd happen? Any tips on maintaining catalog integrity? - Here're the indexes NeoBoard uses: security.declarePublic( 'enumerateIndexes' ) def enumerateIndexes( self ): """ Return a list of ( index_name, type ) pairs for the initial index set. """ return ( ('Title', 'TextIndex') , ('meta_type', 'FieldIndex') , ('getSortKey', 'FieldIndex') , ('getThreadSortKey', 'FieldIndex') , ('isThreadParent', 'FieldIndex') , ('creation_date', 'FieldIndex') , ('Creator', 'FieldIndex') , ('CreatorEmail', 'FieldIndex') , ('getArticleCategory', 'FieldIndex') , ('getNeoPortalContentSearchText', 'TextIndex') , ('getInlineCommentsSearchText', 'TextIndex') , ('getInlineCommentCreators', 'TextIndex') , ('getAttachmentsSearchText', 'TextIndex') , ('getNeoPortalReadCount', 'FieldIndex') , ('getNeoPortalNumContentRatings', 'FieldIndex') , ('getNeoPortalElementNumber', 'FieldIndex') , ('isTempNeoBoardArticle', 'FieldIndex') ) I came to know that 'TextIndex' is deprecated. Have yet to try ZCTextIndex or TextIndexNG ( the latter seems like an overkill). Found 'TopicIndex' very interesting. Would they make much difference? Especially, I was suprised to find the simple 'Title' index takes almost one full second when applied on an object: that getIndex( name ) call alone in the Catalog.py takes this much. So I suspect it's not about Catalog but I'm doing something very stupid in setting up this built-in catalog. ONE FINAL QUESTION: I strongly suspect I wouldn'[t be able to get any faster using ZCatalog. At least not as fast as using RDBMS. I'm thinking... "Not fast enough, not flexible enough since I can't perform sopnisticated queries on ZCatalog and stuff... why not revert to MySQL?" Got any thoughts on this? How does ZCatalog compare to a reasonably fast RDBMS? NeoBoard (1.1) will be taken out of its beta phases when I solve this catalogging weirdness, and might start working on 1.2 using MySQL or SAPDB as backend. Hope somebody can persuave me out of this path... just the thought of having to rewrite the core to use SQL makes me shudder....arrrrrrgh... Any help, hints or comments would be much appreciated. I do need to move on with this project :-( It's been almost a year now...ouch. Weeks became months; months became a whole year... whew. Thanks in advance. --------------------------------------------------------------- Wankyu Choi CEO/President NeoQuest Communications, Inc. http://www.zoper.net http://www.neoboard.net ---------------------------------------------------------------

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Installing a 2nd Distro
by beno 31 Mar '03

31 Mar '03

Hi; I'm trying to install an older version of Zope in addition to my currently running version and running into difficulties. While running python w_pcgi.py Zope first complained (while compiling) that it couldn't find file /usr/local/bin/python2.2/config/Makefile.pre.in Indeed, there was no such file. But there *was* such a file here: /usr/local/bin/Python-2.2.2/Makefile.pre.in so I created a symbolic link (didn't figure it would hurt any ;) Now I get this error: Compiling extensions in lib/python cp /usr/local/lib/python2.2/config/Makefile.pre.in . make -f Makefile.pre.in boot PYTHON=/usr/local/bin/python make: *** No rule to make target `boot'. Stop. Traceback (most recent call last): File "/home/httpd/ZopeInstallation/Zope_software_home2/w_pcgi.py", line 39, in ? if __name__=='__main__': main(sys.argv[0]) File "/home/httpd/ZopeInstallation/Zope_software_home2/w_pcgi.py", line 37, in main import wo_pcgi; wo_pcgi.main(me) File "/home/httpd/ZopeInstallation/Zope_software_home2/wo_pcgi.py", line 33, in main import build_extensions File "/home/httpd/ZopeInstallation/Zope_software_home2/inst/build_extensions.py", line 30, in ? make('lib','python') File "/home/httpd/ZopeInstallation/Zope_software_home2/inst/do.py", line 62, in make do('make -f Makefile.pre.in boot PYTHON=%s' % sys.executable) File "/home/httpd/ZopeInstallation/Zope_software_home2/inst/do.py", line 32, in do if i and picky: raise SystemError, i SystemError: 512 What to do? TIA, beno

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