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Oracle ZODB (Paul's talk in Paris)
by Satheesh Babu 25 Aug '00

25 Aug '00

Hi folks, I read the mail about EuroZope conference. Notes on Paul's speech says "they have an Oracle ZODB backend. They have deployed it. Pending documentation..." Way to go DC! WHERE IS IT????? I searched in CVS, couldn't find it at all... If anyone can point me towards this, it'll be greatly appreciated? Many thanks in advance vsb

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Re: [Zope] speeding up dtml-tree <00b001c006da$d19c4310$6703a8c0@torch>
by Dieter Maurer 25 Aug '00

25 Aug '00

Clinton Roy writes: > .... external method restrictions .... > I'm losing faith people.. Maybe, you should not. There are more ways to build extensions than external methods in "Extension" directories. Each way has its advantages and drawbacks: Type Web Manageable requires restart DTML Methods yes no ZClasses yes no External methods partly no Products partly yes Python Modules no yes The restrictions for source files in the Extension directories are documented together with a description what to do to circumvent the restrictions: These source files are not imported as standard Python modules but they are read in and executed. As a consequence, Zope may simply reread and reexecute them when they changed. A restart is not necessary. If they could be used like full Python modules, then it would be very difficult to do this in a safe manner unless the Python import and lookup mechanisms are changed. This might be possible but difficult. On the downside, instances of classes defined in these source files can not be pickled (and therefore stored in the ZODB). The pickle mechanism does not understand Zope's read and execute but requires standard Python module import. The workaround: define the classes (!) you need for ZODB objects in true Python modules. The documentation suggests to define them in a properly named subpackage of "Shared" such that maintenance will not become a nightmare. Yes, changes to true Python modules (and therefore to your classes) require a Zope restart. But, hopefully, you will not change your classes too often. You can instantiate your classes, i.e. build instances from them, in external methods, i.e. in source files located in an Extension folder. There is no need to have the same code at two places! Classes for picklable objects or infrastructure to be used in several source files in true Python modules, everything else (if you want) in external methods. Each tool has its strengthes and weaknesses. Know them and use the right tool for your task. This applies both to (sub-)tools inside Zope (e.g. external method versus product versus Python module) as well as to Zope itself (versus ASP, PHP, JSP, ...). Dieter

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Re: ZCatalog - OR'ing on different columns (indices)
by Steve Alexander 25 Aug '00

25 Aug '00

Aleksander Salwa wrote: > Is there any better method of OR'ing on differend indices in quering > ZCatalog, then the method described in 'Advanced ZCatalog Searching' <deletia> > > It seems to me to be common case, when we show to user simple search form > with only one input (that is where 'userInput' came from) and 'Go!' > button. User don't want to know, that we have our data splited in many > properties. But on Zope side it's very good to have it structured in that > way - so how to reconcile these things ? I use more than one ZCatalog at a time. One called SiteSearch stores full-text-search information on all the objects in a site. Then, I have other ZCatalogs for domain-specific searches. I use ZPatterns to do this. My objects are derived from DataSkins. I use CatalogTriggers to index my objects in the appropriate catalogs. CatalogTrigger is from Itamar Shtull-Trauring's ZPAddons package. (There will be a new version of this, renamed DataSkin addons released this weekend.) You could also modify CatalogAwareness.py to make an object aware of several catalogs at once. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net

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copy / paste support
by Andy McKay 25 Aug '00

25 Aug '00

When trying to copy an item I get the following item on paste: One or more items referred to in the clipboard data was not found. The item may have been moved or deleted after you copied it. This is a custom python class which is catalogued. Ive no idea why this is happening. Any ideas? -- Andy McKay, Developer, ActiveState http://www.ActiveState.com Programming for the People

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Simple(?) Syntax Question (dtml-in)
by Tim Cook 25 Aug '00

25 Aug '00

I want to use the same DTML method for different operations. It gathers info from properties of DTML Documents and returns a list. The list is a list of lists. Each item in the list valid_prj contains a list of two strings, ie. valid_prj = [['abcd','1234'],['efgh','5678']] I want to only provide the first item of each list in this SELECT: ... <dtml-in valid_prj> <OPTION value="<dtml-var sequence-item>"><dtml-var sequence-item></OPTION> </dtml-in> ... But darn if I can get the right combination for the correct syntax to get only that first item of valid_prj. Thanks, -- Tim Cook -- FreePM Project Coordinator http://www.freepm.org OS Health Care Alliance Supporter http://www.oshca.org

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Re: [Zope] Search on ZCatalog or ZSQL in MySQL
by Dieter Maurer 25 Aug '00

25 Aug '00

Nestor A. Diaz L. writes: > I have to make a system to store news, so i have to migrate a old system > using perl cgi's and perform a search on text files to use Zope as the > search engine however i don't know if i have to use a SQL database like > MySQL or use the ZCatalog, i need full text search, and ZCatalog fits on > the true decision however the current database news is about 350M and i > would like to extend it to store images and file, so is possible that at > the final year if everyting comes ok it outperforms the 1GB data If you have a database or search engine that handles full text, I would go for it. However, most relational databases have difficulties with full text. I doubt, that MySQL can handle it well. The ZCatalog as it is now, is nice for small to medium size content. I, personally, would not use it for content bigger than 50 to 100 MB. Due to some weeknesses in the BTree implementation (which is used by ZCatalog to maintain its indexes) a considerable part of the index structure is rewritten if the index changes. This may lead to a fast growing ZODB with the need for frequent "pack"'s. Before you decide for ZODB, you should make some tests: something like this: * index about 10 MB of content * change content * search with the catalog * index another 10 MB of content (you now have 20 MB content) * change content * search with the catalog For each step: Look how the size of the ZODB changes: before and after packing Look how the main memory requirements changes (especially during indexing) Look how the timings changes (for all relevant operations: indexing, packing, searching) Try to extrapolate your results. You may need to add more 10 MB content chunks to recognize a tendancy. Dieter

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simple question
by Marcus Schopen 25 Aug '00

25 Aug '00

Hi there, just a short question about the tree-tag: sould a tree based navigation placed in a seperate frame? I would like to create my sites with tables, so the tree navigation is placed in a table field. I don't want to use frames. The whole page should be in one table. But this seems to give some strange effects. please see: http://marcus.localguru.de:8080/b3/ Or is this normal behavior of a Zope tree? Thank you Marcus ______________________________________ (0> Marcus Schopen //\ Bielefeld, Germany V_/_ ______________________________________

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brief downtime
by ethan mindlace fremen 25 Aug '00

25 Aug '00

Zopatistas, We're having a brief downtime whilst we work out some issues that have been preventing zope.org from functioning normally. Thanks for your patience, -- ethan mindlace fremen Zopatista Community Liason Abnegate I!

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It Works!!!! I think I'm close, Product Creation and other threads
by Daniel Rusch 25 Aug '00

25 Aug '00

Great news, I did it...! The trick seems to be adding the legacy line to the BasicDocument __init__.py file (see below). This allowed the following line to work in the folderish (SimpleSite) product's manage_addSimpleSite function to quit barfing: ob.manage_addBasicDocument(id='index_html', title='') BTW, Remember I said that I my plan of attach, while I was praying for an epiphany, was to figure out how a Folder could create sub products. Well, I figured this out via an epiphany, I accidentally cd'd to OFSP instead of OFS and I looked at the __init__.py file, it was most illuminating..... Ok it wasn't exactly an epiphany, but I'll still chalk it up to divine intervention.... DR This is the __init__.py file for the folderish product which contains the other product I created. __doc__="""SimpleSite product initialization""" __version__='$Revision: 0.1 $'[11:-2] try: import os, SimpleSite from Globals import ImageFile def initialize(context): context.registerClass( SimpleSite.SimpleSite, constructors=(SimpleSite.manage_addSimpleSiteForm, SimpleSite.manage_addSimpleSite), #icon='simpleSite.gif', legacy=(SimpleSite.manage_addSimpleSite,), ) context.registerBaseClass(SimpleSite.SimpleSite, 'Simple Site') except: print "She's sucking mud in SimpleSite land capt'n:" import traceback traceback.print_exc() This is the __init__.py file for the other product: __doc__="""BasicDocument product initialization""" __version__='$Revision: 0.1 $'[11:-2] try: import os, BasicDocument from Globals import ImageFile def initialize(context): context.registerClass( BasicDocument.BasicDocument, constructors=(BasicDocument.manage_addBasicDocumentForm, BasicDocument.manage_addBasicDocument), #icon='basicDoc.gif', legacy=(BasicDocument.manage_addBasicDocument,), ) context.registerBaseClass(BasicDocument.BasicDocument, 'Basic Document') except: print "She's sucking mud in BasicDocument land capt'n:" import traceback traceback.print_exc() Chris Beaumont wrote: > > Daniel, > > Would you let me know if you get a good answer to your question.. I'm > trying to do something quite similar.. > > Thank you. > > Chris > > Daniel Rusch wrote: > > > > Hello, > > > > (See bottom of this message for all the iterations I have tried) > > > > I've created a product called BasicDocument. I've installed it and it > > works great. > > > > I've also created a folderish product (called SimpleSite). When a user > > selects > > the SimpleSite product from the available objects list, thus creating an > > instance of that product, > > they have an option to create sub folders which contain objects like > > dtml documents, dtml > > methods, and my BasicDocument product (very similar to what happens when > > you instantiate a folder object, you > > can have a dtml method created in the new folder). > > > > I am able to have the manage_addSimpleSite function create > > DTMLDocument, DTMLMethod and Folder objects but I am unable to > > have the function create BasicDocuments (which live in the Products > > directory) additionally, I am unable to it create any Products from > > the Products directory, such as Local File System????? > > > > The code below works great, I get a dtml document, two folders each > > with a dtml method in them.... > > > > > > HOW CAN I CREATE A BascicDocument, LOCAL FILE SYSTEM OR ANY OTHER > > OBJECT FROM THE > > PRODUCTS DIRECTORY IN THIS MANAGE_ADD FUNCTION??????? > > > > Thanks, > > > > Dan > > > > def manage_addSimpleSite(self, id, title='', > > createNewFolder=0, > > createEditFolder=0, > > REQUEST=None): > > """Add a new SimpleSite object with id *id*. > > > > If the 'createNewFolder' and 'createEditFolder' parameters are set > > to any true > > value, an 'New sub Folder' and an 'edit sub Folder' objects are > > created respectively > > in the new SimpleSite. > > """ > > ob=SimpleSite() > > ob.id=id > > ob.title=title > > self._setObject(id, ob) > > try: user=REQUEST['AUTHENTICATED_USER'] > > except: user=None > > #ob.manage_addBasicDocument(id='index_html', title='')<-- This line > > generates: AttributeError: manage_addBasicDocument > > ob.manage_addDTMLDocument(id='index_html', title='') > > if createNewFolder: > > if (user is not None) and not ( > > user.has_permission('Add User SimpleSites', self)): > > raise 'Unauthorized', ( > > 'You are not authorized to add User SimpleSites.' > > ) > > ob.manage_addFolder(id='New'+id, title='', createPublic=1) > > if createEditFolder: > > if (user is not None) and not ( > > user.has_permission('Add Documents, Images, and Files', > > self)): > > raise 'Unauthorized', ( > > 'You are not authorized to add DTML Documents.' > > ) > > ob.manage_addFolder(id='Edit'+id, title='', createPublic=1) > > if REQUEST is not None: > > return self.manage_main(self, REQUEST, update_menu=1 > > > > I have tried the following each generated an error: > > > > 1. ob.manage_addBasicDocument(id='index_html', title='') > > AttributeError: manage_addBasicDocument > > 2. > > ob.manage_addProduct['SimpleSite'].manage_addBasicDocument(id='index_html', > > title='') AttributeError: _getProducts > > 3. > > self.manage_addProduct['SimpleSite'].manage_addBasicDocument(id='index_html', > > title='')AttributeError:manage_addBasicDocument > > 4. > > self.manage_addProduct['BasicDocument'].manage_addBasicDocument(id='index_html', > > title='') TypeError: not enough arguments; expected 2, got 0 > > 5. > > ob.manage_addProduct['BasicDocument'].manage_addBasicDocument(id='index_html', > > title='')AttributeError: _getProducts > > > > _______________________________________________ > > 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 )

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ODBC Bridge / SQL Server stuff
by Phill Hugo 25 Aug '00

25 Aug '00

Hello, Easysoft (www.easysoft.com) supply a simple, efficient SQL bridge which works well with unixODBC (.org) and iodbc (.org) driver managers. We use it on one of our PHP sites to link to an SQL Server db from Linux. It works fine but its a close product. So given the easy of use of XML-RPC or SOAP from Python, it may be sufficient to create your own bridge which calls a remote DB connection made with ASP or Zope on NT. I've set this up with a Python method calling a remote DB connection in PHP using XML-RPC (just pass the query over and get the records back) and it works perfectly. Hope this helps. Phill

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