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ANNOUNCE: Zope 2.0 alpha 4
by Jim Fulton 13 Jul '99

13 Jul '99

Zope 2.0 alpha 4 is available (finally) at: http://www.zope.org/Download/Releases/Zope-2.0.0a4 The changes are listed there. Jim -- Jim Fulton mailto:jim@digicool.com Python Powered! Technical Director (888) 344-4332 http://www.python.org Digital Creations http://www.digicool.com http://www.zope.org 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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win32 BTree seg
by Robin Becker 13 Jul '99

13 Jul '99

I'm getting null pointers in BTree.c in _bucket_set at line 798 apparently self->data is NULL. This is happening when I try out the ZClass tutorial example at the point of adding the ZClass. if(max != i) i++; d=self->data+i; /*self->data is 0*/ if(self->len > i) memmove(d+1,d,sizeof(Item)*(self->len-i)); #ifdef INTKEY d->key=ikey; #else d->key=key; Py_INCREF(key); #endif #ifdef INTVAL d->value=iv; #else d->value=v; Py_INCREF(v); #endif -- Robin Becker

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Re: DCOracle not handling Oracle LONG/LONG RAW datatype
by Andreas Jung 13 Jul '99

13 Jul '99

On Mon, Jul 12, 1999 at 09:23:20AM -0700, Larry Gwinn wrote: > Hello All, > > I have been evaluating the DCOracle extension from > http://www.zope.org/Download/DCOracle/ and have run into an issue when > querying tables with a LONG or LONG RAW data type and I was wondering if > anybody else has encountered this problem. If you execute a SQL select > statement that retrieves from a column that is defined as a LONG or LONG > RAW datatype, when you perform a fetchone you can only successfully > retrieve the first row. The next fetchone will cause a "IndexError: 1" > to occur. This exception is being thrown by the Buffer_item function > located in the Buffer.c file. > I can confirm this behaviour. I always get the following traceback when I try to access a column of type LONG: Traceback (innermost last): File "./test.py", line 25, in ? data = ORA.curs.fetchall() File "/ojs/home/ojs/tools/python-1.5.2/lib/python1.5/DCOracle/ociCurs.py", line 351, in fetchall v=f(1) File "/ojs/home/ojs/tools/python-1.5.2/lib/python1.5/DCOracle/ociCurs.py", line 311, in fetchone if ind[ai] < 0: v=MissingValue IndexError: 1 Testing env: Solaris 2.6, Oracle 7.3.3.6, DCOracle 1.2.1, Python 1.5.2 Cheers, Andreas -- _\\|//_ (' O-O ') ------------------------------ooO-(_)-Ooo-------------------------------------- Andreas Jung, Saarbrücker Zeitung Verlag und Druckerei GmbH Saarbrücker Daten-Innovations-Center Gutenbergstr. 11-23, D-66103 Saarbrücken, Germany Phone: +49-(0)681-502-1563, Fax: +49-(0)681-502-1509 Email: ajung(a)sz-sb.de (PGP key available) -------------------------------------------------------------------------------

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ZClass Meta Types
by Jason Spisak 12 Jul '99

12 Jul '99

Zopists, When I add a New ZClass and then Change it's meta_type name, that changes doesn't take place in the pull down add menus. even after a pack and restart. Anybody else experienceing that? It changes in the Basic tab, but it doesn't really change. Jason Spisak webmaster(a)mtear.com

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Re: [Zope-dev] Re: Subclassing
by Kevin Dangoor 12 Jul '99

12 Jul '99

Hi Jason, Make sure that the ZClasses are all within the same Product. In your initial message, you had stated that your ZClass will end up getting quite large if all of the subclasses have to be contained within it... in reality, they only have to be in the same Product. So your Product can get quite large. Kevin --- Jason Spisak <webmaster(a)mtear.com> wrote: > Brian, > > I just did a cvs update as of 12:00 PM PST and I > still don't get any of > the ZClasses which I create in the base class select > box. Should I > submit this to the Collector? > > Jason Spisak > webmaster(a)mtear.com > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://www.zope.org/mailman/listinfo/zope-dev > > (For non-developer, user-level issues, use the > companion list, > zope(a)zope.org, > http://www.zope.org/mailman/listinfo/zope ) > > > _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com

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RE: [Zope-dev] manage_afterAdd and manage_beforeDelete
by Brian Lloyd 12 Jul '99

12 Jul '99

> >Well, technically there is a constructor of sorts - the DTML method > >or External method that is the target of the "Add" form for your > >ZClass is basically the equivalent of a Python constructor > > I've been adding a method to my ZClasses called > 'manage_afterAdd' (and often, 'manage_beforeDelete'), which > are called by the ZClass framework, I think. It's really > convenient, but I'm not entierly sure they're not reserved > for internal uses. I haven't found anything that uses them yet. > > Mike Pelletier. (I've CC'ed the lists on this, since it probably of interest to other folks out there...) Mike, It probably a bad idea to try to use manage_afterAdd as a handy constructor - the manage_afterAdd and manage_beforeDelete methods are currently a lightweight solution for the fact that there is no "event model" in Zope, but often objects will want to perform some extra activities when they are added/deleted (such as add or remove themselves from Catalogs). The manage_afterAdd, in particular, could get you in trouble, since it will also be called whenever an object cut/copied and pasted to a new location. In that case the construction logic would almost certainly not be appropriate, and could actually run without raising an error, but re-initializing and wiping out the existing data in your object in the process. :( In general, the manage_afterAdd and manage_beforeDelete protocol should be thought of as hooks for fixing up or cleaning up the environment of an object on add/delete/cut/copy/paste events (registering and unregistering with Catalogs, etc.). Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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RE: Subclassing
by Brian Lloyd 12 Jul '99

12 Jul '99

> Zopists, > > I noticed a post in the list a while back about Subclassing. In order > to make a ZClass inherit from a Base ZClass like lets say a "Findable" > :) base class. Then I have to put all of the ZClasses that I want to > decend from Findable inside the Findable ZClass. Since they > don't show > up in the "Add ZClass" interface. Won't this means that the Findable > ZClass will be very fat indeed? I'm probably misinterpreting the > Subclass issue. > > All my best, > > Jason Spisak A ZClass doesn't need to be contained in another ZClass in order to inherit from it. For example, let's say you create a Product called "SpamCan". Inside of SpamCan, you can create a "Findable" ZClass. After adding that, you can create a "SpamCan" ZClass and "Findable" should show up in the list of possible base classes when you define SpamCan. It should also show up in the bases list if you try to create more ZClasses _inside_ of the SpamCan class. Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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RE: [Zope-dev] display a ZClass instance
by Michel Pelletier 12 Jul '99

12 Jul '99

> -----Original Message----- > From: Itamar S.-T. [mailto:itamars@ibm.net] > Sent: Monday, July 12, 1999 1:39 PM > To: zope-dev(a)zope.org > Subject: [Zope-dev] display a ZClass instance > > > I create a ZClass, which inherits from ObjectContainer, with > a index_html > DTML method, and create an instance of the class called test. > > http://localhost:9673/test or > http://localhost:9673/test/index_html works > fine, but if I try doing  from inside the DTML method > http://localhost:9673/test/index_html it writes in the html > file (it doesn't > show up since Netscape thinks its a tag) > > <AnouncementsClass instance at 84f9e10> > > instead of what I want it to do - that is, show the output of > test/index_html. > How then do I display it? Does it need to inherit from anything else? > If I understand your question correctly, try:  Saying  will just render the repr of the object, which because it's a ZClass is excatly what you get. DTML does a bit of sniffing when you #var objects, and if that object is a DTML object (like the test object's index_html) it will render it correctly. -Michel > -- > Itamar - itamars(a)ibm.net > ----------------------------o--------------------------------- -------------o > Sealingwax Greeting Cards | Trust? Ha! The US dollar is > backed by ICBMs! | > http://www.sealingwax.com | --Anonymous Coward, > Slashdot | > > _______________________________________________ > Zope-Dev maillist - Zope-Dev(a)zope.org > http://www.zope.org/mailman/listinfo/zope-dev > > (For non-developer, user-level issues, use the companion list, > zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope ) >

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RE: [Zope-dev] Re: Subclassing
by Alexander Staubo 12 Jul '99

12 Jul '99

Your classes are defined within the same product, right? -- Alexander Staubo http://www.mop.no/~alex/ "He could open a tin of sardines with his teeth, strike a Swan Vestas on his chin, rope steers, drive a steam locomotive and hum all the works of Gilbert and Sullivan without becoming confused or breaking down in tears." --Robert Rankin, _The Book of Ultimate Truths_ >-----Original Message----- >From: zope-dev-admin(a)zope.org [mailto:zope-dev-admin@zope.org]On Behalf >Of Jason Spisak >Sent: 12. juli 1999 21:18 >To: Brian Lloyd >Cc: zope-dev(a)zope.org >Subject: [Zope-dev] Re: Subclassing > > >Brian, > >I just did a cvs update as of 12:00 PM PST and I still don't get any of >the ZClasses which I create in the base class select box. Should I >submit this to the Collector? > >Jason Spisak >webmaster(a)mtear.com > >_______________________________________________ >Zope-Dev maillist - Zope-Dev(a)zope.org >http://www.zope.org/mailman/listinfo/zope-dev > >(For non-developer, user-level issues, use the companion list, >zope(a)zope.org, http://www.zope.org/mailman/listinfo/zope ) >

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RE: [Zope-dev] ZClasses instances become detached from class
by Brian Lloyd 12 Jul '99

12 Jul '99

> This distinction between class and instance is significant. One caveat > concerns folders: Don't make the mistake of creating a folder within > your class. If you do that, each instance will inherit this folder, as > expected. But any modifications to perform on the folder -- including > adding objects -- will show up in all instances. (Of course, > there might > be cases where this is exactly the intended effect.) So in > this case you > should not create the folder within the class, but let one of your > methods create it. > > (Imho, this is a weakness in the current ZClass model: You can't add > constructors. So given the previous paragraph, there's no way you can > say, "When an instance of this class is created, such and such folder > should be created within the instance.") Well, technically there is a constructor of sorts - the DTML method or External method that is the target of the "Add" form for your ZClass is basically the equivalent of a Python constructor, except that it is outside-in, rather than inside-out. Where in Python you might do: def __init__(self, id): self.id=id self.sub=self.CreateNewFolder('blah') ...in the target of your Zope Add form for the ZClass you would do something like this if you were using a DTML Method:        ...or in an external method you might do: def addAMyZClass(self, id, REQUEST=None): """ """ # Get the actual destination object, using the this() # method, to be sure we get it in the right context.. self=self.this() # Create the new instance newob=self.MyZClass(id) newob.id=id # Set properties based on the contents of the Add form newob.propertysheets.Basic.manage_changeProperties(REQUEST) # Add a new Folder to the new instance newob.manage_addFolder('foobar') # Add the new instance to the target object self._setObject(id, newob) return 'OK!' Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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