November 1999 - Zope

Re: [Zope] zope.org speed
by Sheng Lan 02 Nov '99

02 Nov '99

yes ,it is much faster then ever,who can tell me why,how can I change my zope website config to get the speed? >From: Chris McDonough <chris(a)iqgroup.com> >To: "'zope(a)zope.org'" <zope(a)zope.org> >Subject: [Zope] zope.org speed >Date: Mon, 1 Nov 1999 14:33:48 -0500 > >Zope.org seems to be much, much faster today than any time in the recent >past. > >This is a Good Thing... > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://www.zope.org/mailman/listinfo/zope > >(Related lists - please, no cross posts or HTML encoding! > >To receive general Zope announcements, see: >http://www.zope.org/mailman/listinfo/zope-announce > >For developer-specific issues, zope-dev(a)zope.org - >http://www.zope.org/mailman/listinfo/zope-dev ) ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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Zclasses derived from ZCatalog
by Tom Schwaller 02 Nov '99

02 Nov '99

hi all, http://www.zope.org/Members/Zen/tips/tip_ZCatalogInZClass shows nicely how to add a ZCatalog in a ContainerClass. How does one implement the same functionality when deriving a class A from ZCatalog: A(ZCatalog) -- B(CatalogAware) How to modify <dtml-with "Catalog"> <dtml-call "manage_addColumn('area',REQUEST,RESPONSE,URL1)"> ? <dtml-with _catalog> will not work. Then I'd like to add B-Objects, which are CatalogAware, to the A-Catalog. Right now I use only one instance of the A-class (Books) and add the Books (type B) by writing: <dtml-with "Book.createInObjectManager(REQUEST['id'], REQUEST)"> <dtml-call "propertysheets.buchdaten.manage_editProperties(REQUEST)"> <dtml-call unindex_object> <dtml-call "manage_editCataloger('Books', REQUEST)"> <dtml-call reindex_object> </dtml-with> which is nonsense, but works for one Book-Folder with a defined name. I like deriving from ZCatalog, so the users do not see the Catalog (otherwise one could delete it) and the ContainerClass (Books) is the catalog of its members (Book). Any hints? -- Tom Schwaller http://www.linux-magazin.de

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RE: [Zope] zope.org speed
by Otto Hammersmith 02 Nov '99

02 Nov '99

If you were to include a default Expries header, it would be best if it were tunable without hacking the code. Perhaps a couple of standard properties, expires for an exact time for when an object will expire and expires_interval for how long from now it should expire. -Otto. -----Original Message----- From: Paul Everitt Sent: Tue, 2 Nov 1999 10:06:54 -0500 To: tpassin(a)mitretek.org, zope(a)zope.org Subject: RE: [Zope] zope.org speed [snip] Hmm, I think that: http://lists.zope.org/pipermail/zope/1999- November/013132.html ...covers the details. If nobody reports breakage on the HTTP header stuff, we'll consider making it a part of future Zope releases. --Paul ______________________________________________________________________ Get Visto.com! Private groups, event calendars, email, and much more. Visto.com. Life on the Dot. Check it out @ http://www.visto.com/info

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Re: Mail archive search is broken
by Michel Pelletier 02 Nov '99

02 Nov '99

Itamar Shtull-Trauring wrote: > > The move to the new server seems to have broken the mail archive search you > setup at: > http://www.zope.org:12080/archives/Catalog/S > > Could you please fix it? It was very useful. Goto http://classic.zope.org:12080/archives/Catalog/S The main web site moved to a new computer, and some names and things changed. It was a painful exercise in amateur system administration. -Michel

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Difference between "id" and id ?
by flight＠mathi.uni-heidelberg.de 02 Nov '99

02 Nov '99

Is it okay that <dtml-var id> and <dtml-var "id"> have different results ? I'm trying the following code in a DTML method inside a ZClass, but the dtml-if fails since <dtml-var "id"> is empty. <dtml-var id> OTOH shows the expected result, the id of the Seite object: <table> <dtml-let selfid=id> <dtml-in "PARENTS[1].objectValues('Seite')"> <tr><td><dtml-if "id==selfid"><dtml-var "PARENTS[-2].Images.littlearrow"></dtml-if></td><td><a href="../<dtml-var id>"><dtml-var font2><dtml-var title_or_id></font></a></td></tr> </dtml-in> </dtml-let> </table> This is with the most recent CVS Zope, FWIW. I'd like to use this method to render a navigation sidebar that lists the "sister" Seite objects of this ZClass object. Gregor

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XML Document changing security error
by julio dinis 02 Nov '99

02 Nov '99

Hi all, When I try to change security permissions to a specific node of a xml document tree created with XMLDocument1.0a2 I get this error: Traceback (innermost last): File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 214, in publish_module File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/local/src/Zope-2.0.1-linux2-x86/lib/python/Zope/__init__.py, line 201, in zpublisher_exception_hook (Object: Manageable) File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 165, in publish File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_changePermissions) File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: manage_changePermissions) File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/AccessControl/Role.py, line 247, in manage_changePermissions (Object: Manageable) File/usr/local/src/Zope-2.0.1-linux2-x86/lib/python/AccessControl/Permission.py, line 171, in setRoles AttributeError: This problem cant let me put anonymous user to browse same childnode. Only with superuser I can browse the DOM tree, even Manager Role cant. Can be a XMLDocument1.0a2's problem or with my specific xml document? Can anyone help me, thanks Júlio Silva ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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Re: [Zope] Pointer-to-Object Properties
by Thomas B. Passin 02 Nov '99

02 Nov '99

From: Toby Dickenson <tdickenson(a)geminidataloggers.com> >> From: Michael Bernstein [mailto:mbernstein@profitscape.net] > >> It would be very beneficial to be able to 'point' to >> arbitrary objects as if they >> were sub objects, thus enabling one-to-many, many-to-one, and >> many-to-many >> relationships not constrained by the object heirarchy. >> >> Classic example: Many author objects, many book objects. >> Authors can have written >> several books, and certain books are collaborations with more >> than one author. It >> does not make sense for books to be contained within authors, >> or authors to be >> contained within books. >> >> While this simplistic scenario would allow us to either >> assign a list property >> with book titles to an author object, or a list property >> containing authors names >> to a book object, and live with the small amount of >> duplicated data > >I think the key observation here is that the additional information >should be sufficient to identify the foreign object.... then the >pointed-to object can be located by searching a Catalog. > ... Many-to-many relationships are always tricky. As others have pointed out in this thread, it is highly desirable to have some means to maintain data and referential integrity. In SQL this is done by declaring create-delete-update rules for each foreign key relationship. Also, you want to make keep the properties of the two types of objects in the many-to-many separate, to minimize coupling. In the case of books, one way to do this is to have a book maintain a list of its authors, and each author to maintain a list of its books. Then a book and an author only need to know about lists, not about authors and books. You can delete a list item without deleting its parent object. But now, if a parent object is deleted, how do you make sure all references to it in various lists are also deleted? Not so easy! Back to data integrity again. My point is really that object encapsulation and data integrity are very important, and it is easy to jump to a design that does not provide for them. If we're going to come up with a Zope-ish way let's make sure its design is well thought out in these areas. Tom Passin

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Re: [Zope] Difference between "id" and id ?
by Kevin Dangoor 02 Nov '99

02 Nov '99

For some objects, id is a simple property. In others, it is a method. <dtml-var id> will display id, if it is a property *or* call it if it is a method. <dtml-var "id"> will only display the contents of id. In order to call it, you would have to do: <dtml-var "id()"> Kevin -----Original Message----- From: flight(a)mathi.uni-heidelberg.de <flight(a)mathi.uni-heidelberg.de> To: zope(a)zope.org <zope(a)zope.org> Date: Tuesday, November 02, 1999 10:17 AM Subject: [Zope] Difference between "id" and id ? >Is it okay that > > <dtml-var id> and <dtml-var "id"> > >have different results ? I'm trying the following code in a DTML method inside >a ZClass, but the dtml-if fails since <dtml-var "id"> is empty. ><dtml-var id> OTOH shows the expected result, the id of the Seite object: > ><table> > <dtml-let selfid=id> > <dtml-in "PARENTS[1].objectValues('Seite')"> > <tr><td><dtml-if "id==selfid"><dtml-var "PARENTS[-2].Images.littlearrow"></dtml-if></td><td><a href="../<dtml-var id>"><dtml-var font2><dtml-var title_or_id></font></a></td></tr> > </dtml-in> > </dtml-let> ></table>

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RE: [Zope] zope.org speed
by Paul Everitt 02 Nov '99

02 Nov '99

Thomas wrote: > Nope, a lot of the speed increase came before any hardware > change. See posts to > this group over the last few days. They changed returned > headers so browsers > can do more intelligent caching, and they increased the > Zope-side object > caching. After this, I saw a dramatic improvement - no > hardware involved. > > It would be useful to see the exact details of how they did > it so the rest of us > can too. Hmm, I think that: http://lists.zope.org/pipermail/zope/1999-November/013132.html ...covers the details. If nobody reports breakage on the HTTP header stuff, we'll consider making it a part of future Zope releases. --Paul

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Re: [Zope] ZClass
by Thomas B. Passin 02 Nov '99

02 Nov '99

From: Stephan Richter <srichter(a)cbu.edu> To: Tom Deprez <tom.deprez(a)uz.kuleuven.ac.be>; zope(a)zope.org <zope(a)zope.org> >> Why does Zope asks for a value to enter for a new property when you're >> making a class? I understand that you've to enter a value when you're >> making a Class instance? But while defining a class??? Is this meant as a >> default value?? >Okay, the problem is that Python does not know about data types. You cannot >declare an"empty" (variable without value) variable in Python, since a >statement like 'int test' does not exist.I have heard from DC (someone correct [snip] Sure you can declare an empty variable in Python, and you can test for it. Of course you can't test for its data type, but so what - it can become any data type you need. Run the intrepreter and try this: >>> aa Traceback (innermost last): File "<stdin>", line 1, in ? NameError: aa >>> # aa was not declared so it does not exist. >>> ob=None >>> ob # ob was declared as an empty object (that's what None is: a standard empty object) and gives no error when referred to. >>> ob==None 1 >>> # The statement ob==None is true >>> aa==None Traceback (innermost last): File "<stdin>", line 1, in ? NameError: aa # The statement aa==None is an error since aa has not been created. Finally, create this script as ob.py and run it: try: aa==None except: print "aa hasn't been defined" Run it: C:>python ob aa hasn't been defined So in Python you CAN define an empty variable and check for its existence, but whether or not that is a useful or even possible thing to do in Zope is another matter. Tom Passin

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