- Zope - Zope lists

XML Document: lower-case id-attribute exception
by Hans van Mourik 21 Jan '00

21 Jan '00

When trying to add an XML Document instance that has lower case id-attributes within tags (eg. something like <para id="p001">) Zope raises an exception (Error Value: Invalid or duplicate property id). But when the attribute is upper case, everything goes allright (<para ID="p001">). This time the XML-element instance has both a standard Zope id-property and an ID-property. Now maybe the XML parser that is used by Zope could be altered somewhat so that it translates to upper-case all occurences of an id-attribute. Hans van Mourik Electronic Text Centre Leiden <http://www.etcl.nl> ---example one:--- <?xml version="1.0"?> <article status="beta"> <section> <title>Sample document</title> <para ID="p001">foo</para> <para ID="p002">bar</para> </section> </article> ---example two (exception):--- <?xml version="1.0"?> <article status="beta"> <section> <title>Sample document</title> <para id="p001">foo</para> <para id="p002">bar</para> </section> </article>

1 0

RE: [Zope] ZopePacks: A Proposal for a new Zope Product...
by Martijn Pieters 21 Jan '00

21 Jan '00

> -----Original Message----- > From: Butch Landingin [mailto:butchland@yahoo.com] > > Hi all, > > I've created a proposal for a new Zope product which I'm > in the process of building. > > The url of the proposal is: > > http://www.zope.org/Members/butchland/ZopePackProposal/index_html > > Its a long document and it suffers a little in the > succintness/clarity department (sorry about that :() > > In summary, I'm proposing a mechanism by which > we can manage ZClasses and other objects (e.g. Folders) > exported via .zexp files and somewhat make the process > of deploying ZClass-based applications easier and > error-free. > > I hope you take the time out to read it and give me your > valuable opinion, advice, and help. A very good proposal, Butch. Why not include Python products as well? Granted, you have to restart Zope for them, but the dependency checks alone would make it very worthwhile, a bit like RPMs. The format developed for a ZopePack could also include information on where to find the latest version, and the ZopePackProduct could even check for newer versions on demand. No downloading to the server with automatic install though, unless we develop some kind of signing scheme, and other security checks. Heck, we could even adjust Zope.org Products to support ZopePacks in some way. -- Martijn Pieters, Software Engineer | Digital Creations http://www.digicool.com | Creators of Zope http://www.zope.org | mailto:mj@digicool.com ICQ: 4532236 | PGP: http://wwwkeys.nl.pgp.net:11371/pks/lookup?op=get&search=0xA8A32149 -------------------------------------------

1 0

ZClass Objectmanager question ...
by Darran Edmundson 21 Jan '00

21 Jan '00

One more ObjectManager/ZClass question ... When nesting ZClasses, the "SubObjects" tab of the container class says to "Select the kinds of things that can be added to objects of this kind". However, the nested ZClass meta-type does not appear in this selection box. Rather, one proceeds to the "Permissions" tab and changes the class permissions to allow addition of the nested class. I don't understand this. While I know what to do (in recipe fashion), I don't understand the rationale behind it. Cheers, Darran.

1 0

Cataloging ZClasses which are subclasses of a ZClass?
by Darran Edmundson 21 Jan '00

21 Jan '00

To use a well-worn metaphor, I continue my steep climb up the Zope learning curve (top-roped by the able members of this list). Today I struggled with ZCatalog-aware ZClasses. I have been toying with a simple example - a URLClass nested beneath a URLFolderProduct and URLFolderClass. URLClass is catalog-aware and, among others, has a string property for the URL (note, beware of naming a ZClass property "URL"). This all works - I can create a URLFolder and instances of URLClass within it. Now I add a "singleton" (by virtue of me only creating one instance?) ZCatalog in the URLFolder. My problem is that the URLClass's meta-type does not show up in the ZCatalog's "Find items to ZCatalog" tab. (This seems reminiscent of the ZClass ID bug.) If URLClass is created in the Product root (and thus able to be added anywhere rather than just in URLFolder objects), it shows up in said Catalog tab selection box. Eventually I want to move on and have my URLFolder subclassed from ZCatalog as discussed in: http://www.zope.org/Members/tseaver/inherit_ZCatalog but I won't proceed with this until I have this basic example worked out. As always, any help is much appreciated. Darran.

1 0

Help - ZODB Couldn't load state
by Michael Hamilton 21 Jan '00

21 Jan '00

Is it possible to use ZODB to access a non Zope filestore from an external method that is being called from Zope? I'm getting an error when I try to do so? I'm trying to use ZODB to store some data. I've created my own DB and filestore outside of zope and it works find with my external test rig. But when I integrate my code into Zope as external methods, when I try to retreive objects I get errors such as: In the browser window: Zope has encountered an error while publishing this resource. Error Type: AttributeError Error Value: User with the tail of the stack trace reading: File /usr/local/Python/local/lib/ServiceQuery.py, line 36, in __init__ File /usr/local/Python/local/lib/ObjectStore.py, line 47, in getObject File /usr/local/Zope/Zope-2.1.2-src/lib/python/ZODB/Connection.py, line 396, in setstate File /usr/local/Zope/Zope-2.1.2-src/lib/python/ZODB/Connection.py, line 193, in _persistent_load (Info: ('\000\000\000\000\000\000\000\030', ('__main__', 'User'))) File /usr/local/Zope/Zope-2.1.2-src/lib/python/ZODB/Connection.py, line 153, in __getitem__ And the stderr of the server emits: 2000-01-21T09:58:11 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000\000\000'

1 0

objectValues &c for base class?
by Anthony Baxter 21 Jan '00

21 Jan '00

If I've got a bunch of ZClasses, all derived from the same base ZClass, is there an easy way to say 'give me a list of all objects whose class or base class is foo'? Sort of like what the current objectValues &c does, but being able to specify the meta_types of the base classes, rather than having to enumerate all the possible different classes. What about if all the classes are in the same Product in Control_Panel/Products? Could you filter based on product? ta, Anthony

1 0

RE: [Zope] How to I use aquisition in an external method?
by Martijn Pieters 21 Jan '00

21 Jan '00

> -----Original Message----- > From: Chris McDonough [mailto:chrism@digicool.com] > > Dylan, > > I usually pass "this()" in to an external method to get a handle on > acquisition from an external method. > > e.g.: > > <dtml-call "emMyExternalMethod(this())"> > > def myExternalMethod(context): > if context.folder.attribute: > do something > else: > do something else > > this() generally refers to the folder containing the dtml method. in > the external method, you can use acquisition through this object. > > "Jay, Dylan" wrote: > > > > I want to find out if a callable object exists from a > folder object using > > acquisition. ie if I call folder.method() it will be > guaranteed to work. > > If your external method signature has 'self' as the first parameter, the current object (be it the Folder or DTML Document or some such), will be passed in with that parameter. So: def MyExternalAttribute(self) return self.acquired_folder.attribute -- Martijn Pieters, Software Engineer | Digital Creations http://www.digicool.com | Creators of Zope http://www.zope.org | mailto:mj@digicool.com ICQ: 4532236 | PGP: http://wwwkeys.nl.pgp.net:11371/pks/lookup?op=get&search=0xA8A32149 -------------------------------------------

1 0

[ZGotW] Issue #1 Entry
by Zope Guru of the Week 21 Jan '00

21 Jan '00

=================================================================== Issue #1 -- DTML Subroutines =================================================================== Status: Open Zen Level: Novice (1/8) Keywords: DTML Submitted by: Tres Seaver tseaver(a)palladion.com ------------------------------------------------------------------- Suppose you have been happily hacking away at your Zope site, and discover that you are reusing a chunk of DTML over and over::  <dtml-in "objectValues( 'FooType' )"> <tr> <td> <a href="&dtml-id;"><dtml-var id></a> </td>  </tr> </dtml-in> Now, you decide to "refactor" the site to follow the "Once and Only Once":http://c2.com/cgi/wiki?OnceAndOnlyOnce dictum of "Extreme Programming":http://www.extremeprogramming.org : i.e., you'd like to make this snippet a reusable "subroutine," so that you could make changes to it in just one place. The intent is to be able to reuse the loop, but be able to vary the meta_type(s) being passed to the loop: in one spot, it would be '"FooType"', but in another, it might be '[ "Folder", "DTML Document" ]' [1]. How do you move this code out into a DTML Method and then replace all the cloned copies with calls to that method? [1] *Please pardon my inverting the single/double quotes here: while not valid DTML, it **is** valid Python, and renders correctly as StructeredText.* ------------------------------------------------------------------- Entry from: Jeff K. Hoffman jeff(a)goingv.com ------------------------------------------------------------------- First, create a DTML Method: <pre> <dtml-in "objectValues(type_list)"> <tr> <td><a href="&dtml-id;">&dtml-id;</a></td> </tr> </dtml-in> </pre> with id 'table_of_type' and title 'type_list'. Now, replace all cloned copies of this code with the following: <pre> <dtml-var "table_of_type(this(), _, type_list = ['FooType'])"> </pre> If you want to call this method on objects elsewhere in the hierarchy (i.e., not the "current" folder): <pre> <dtml-with target> <dtml-var "table_of_type(this(), _, type_list = ['FooType'])"> </dtml-with> </pre> where target is 'test', or '"PARENTS[-1].test"', etc. --Jeff -------------------------------------------------------------------

1 0

[ZGotW] Issue #1 Entry
by Zope Guru of the Week 21 Jan '00

21 Jan '00

=================================================================== Issue #1 -- DTML Subroutines =================================================================== Status: Open Zen Level: Novice (1/8) Keywords: DTML Submitted by: Tres Seaver tseaver(a)palladion.com ------------------------------------------------------------------- Suppose you have been happily hacking away at your Zope site, and discover that you are reusing a chunk of DTML over and over::  <dtml-in "objectValues( 'FooType' )"> <tr> <td> <a href="&dtml-id;"><dtml-var id></a> </td>  </tr> </dtml-in> Now, you decide to "refactor" the site to follow the "Once and Only Once":http://c2.com/cgi/wiki?OnceAndOnlyOnce dictum of "Extreme Programming":http://www.extremeprogramming.org : i.e., you'd like to make this snippet a reusable "subroutine," so that you could make changes to it in just one place. The intent is to be able to reuse the loop, but be able to vary the meta_type(s) being passed to the loop: in one spot, it would be '"FooType"', but in another, it might be '[ "Folder", "DTML Document" ]' [1]. How do you move this code out into a DTML Method and then replace all the cloned copies with calls to that method? [1] *Please pardon my inverting the single/double quotes here: while not valid DTML, it **is** valid Python, and renders correctly as StructeredText.* ------------------------------------------------------------------- Entry from: Jeff K. Hoffman jeff(a)goingv.com ------------------------------------------------------------------- First, create a DTML Method: <pre> <dtml-in "objectValues(type_list)"> <tr> <td><a href="&dtml-id;">&dtml-id;</a></td> </tr> </dtml-in> </pre> with id 'table_of_type' and title 'type_list'. Now, replace all cloned copies of this code with the following: <pre> <dtml-var "table_of_type(this(), _, type_list = ['FooType'])"> </pre> If you want to call this method on objects elsewhere in the hierarchy (i.e., not the "current" folder): <pre> <dtml-with target> <dtml-var "table_of_type(this(), _, type_list = ['FooType'])"> </dtml-with> </pre> where target is 'test', or '"PARENTS[-1].test"', etc. --Jeff -------------------------------------------------------------------

1 0

How to I use aquisition in an external method?
by Jay, Dylan 21 Jan '00

21 Jan '00

I want to find out if a callable object exists from a folder object using acquisition. ie if I call folder.method() it will be guaranteed to work.

2 1