Re: [Zope-dev] Specialists and __bobo_traverse__
Phillip J. Eby wrote: I'm pretty sure DTML methods *won't* work. "Python Methods" might. I don't know about external methods, python scripts, etc. I have successfully used PythonScripts for this. -- Steve Alexander ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] recent DynPersist.dll for windows
Hi Folks, Does anyone have a recently compiled DynPersist.dll from ZPatterns, compiled for Windows ? Thanks. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] manage_changeProperties in a loop
Arno Gross wrote:
Suppose I have a list of existing folder objects and depending
on their index in the list I want to set a property called 'rang'.
I assumed you could something like this:
dtml-call "REQUEST.set('rangList','folder1;folder2;folder2')"
(normally the list comes from outside)
dtml-in " _.string.split(rangList,';')"
dtml-with "_.getitem('sequence-item')"
Here, you're getting an item with the literal id 'sequence-item'.
What you mean is to get the item with the id described by the variable
sequence-item. So, use:
dtml-with "_.getitem(_['sequence-item'])"
Hope that helps.
This really is a [EMAIL PROTECTED] question, not a [EMAIL PROTECTED]
question. Please do try to choose the appropriate list for the question.
Thanks.
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Re: [Zope-dev] Specialists and __bobo_traverse__
Roch'e Compaan wrote: Recent sightings of the use of __bobo_traverse__ in SkinScript gave me hope of giving users a more useable breadcrumbs trail in the case where I have nested specialists. My TaskTemplates specialist is nested inside my RequestTypes specialist. When I retrieve a dataskin from the RequestTypes specialist I have a tab that lists TaskTemplates for that RequestType specialist. Following a link from the TaskTemplate list takes you to that instance. Thus results in a url like this: /RequestTypes/request type instance/Task Templates/task template instance, and what I ideally want is: /RequestTypes/request type instance/task template instance. I read all the comments about __bobo_traverse__ and created a python method, "traversal_method" inside the "RequestTypes" specialists. I must admit that I don't really understand Zope's traversal machinery yet and would appreciate some guidance. With your code below, and with a concrete example, can you say what you want to happen, and what actually does happen? My SkinScript for RequestTypes: WITH SELF COMPUTE __bobo_traverse_=traversal_method You'll want another underscore in there: __bobo_traverse__ My traversal_method: ob = getattr(self, name) if ob is not None: return ob If ob is not found, you'll get an error raised. You need to have some sort of marker for the default value. marker=[] ob=getattr(self, name, marker) if ob is not marker: return ob # continue your method Of course, you only need one marker in your class. You can do that if you implement your method as an external method, or perhaps with a default value for an argument on you python method. Or, you could not worry about creating a new empty list on each request. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Massive scalability
Michael Bernstein wrote: I am currently planning two separate 'Archive' type projects/Products. In both cases, I need to make sure that my implementation will scale to hundreds of thousands or even millions of objects. In one project the objects are very simple ZClasses with a few attributes, in the other project, the objects will be instances of the Photo Product, and considerably larger. Do you mean "instances of the Photo Product" or "instances of class FooBar from the Photo Product" ? One implementation I'm considering is a simple Specialist with a Rack. Does anyone know if there are any inherent limitations on the number of objects that can be stored in a Rack? are there any performance limitations at the scale that I'm talking about? Seeing as a Rack can provide data from absolutely anywhere, I can't see a problem with this. If you're talking about the BTree implementation that Racks use when they store data in the ZODB, well, I've never stored more than a few thousand objects in one of those. There certainly aren't the same limitations that you get with the default ObjectManager, as that uses a python dict to hold its sub-objects. The performance limitations will more likely be to do with searching and indexing the data, adding the data in bulk (if you need to do this), and retrieving the data if you have a vast number of clients wanting it all at once. The other implementation I'm considering is to create a ZClass that inherits from ZCatalog and Btree Folder. I can't think why you'd want to do that. What role would instances of this class play in your application? Would this approach run into any scalability problems with the number and type of objects I'm talking about? I think other aspects of your application will determine whether it will scale. Scalabillity is an emergent property of a system. You only get to know about it when you consider the system holisticly. With Zope, where you store objects and how you plan to find objects, is more significant than what the objects you're storing are. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Tip: Skinscript Debugging
When debugging skinscript, especially tricky dependencies between what
gets computed when during state changes, do the following:
1: Run zope in debug mode (-D)
2: Put an external method called print_ in the root of your ZODB, with
the code:
def print_(s):
print s
3: In your SkinScript, if you want to know when a trigger is called, or
when a set of attributes get computed, use this kind of thing:
WITH QUERY foo(id=some_id) COMPUTE
thing=RESULT,
bar=baz,
_printout_foo=self.print_('query foo called, id=%s' % some_id)
OTHERWISE LET
thing=_.None,
bar='no bar',
_printout_foo=self.print_('query foo called, otherwise clause')
WHEN OBJECT CHANGED CALL
print_('CHANGED start'),
Catalog
.uncatalog_object(_.string.join(self.getPhysicalPath(),'/')),
print_('CHANGED middle'),
Catalog
.catalog_object(self, _.string.join(self.getPhysicalPath(),'/')),
print_('CHANGED end')
4: Read the debug printout, and work out that you're computing
attributes for cataloging before changing the attributes they depend on.
5: Amend code and skinscript, test, document code, sleep.
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[Zope-dev] SkinScript enhancement
While debugging some dependencies in some of my SkinScript, I had an idea.
SkinScript could be extended so that COMPUTE statements can have a
RECOMPUTE FOR clause. This clause would tell a dataskin to invalidate
its cache for the attributes in the COMPUTE statement if any of the
attributes in the RECOMPUTE FOR clause changed.
So,
WITH QUERY some_method(primary_key=ms_vars_id) COMPUTE
foo,bar,baz
OTHERWISE LET
foo='no foo',
bar='no bar',
baz='no baz'
RECOMPUTE FOR
ms_vars_id
This is equivalent to the above statement, without the RECOMPUTE FOR
clause, followed by a trigger:
WHEN OBJECT ADDED, CHANGED CALL
HAS_CHANGED('ms_vars_id')
and self._uncache_attrs(['foo', 'bar', 'baz'])
This assumes a method of DataSkins.DataSkin _uncache_attrs:
def _uncache_attrs(self, names):
v=self._v_attrCache
for name in names:
del v[name]
I haven't tested any of this yet.
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[Zope-dev] Re: SkinScript enhancement
Steve Alexander wrote: This assumes a method of DataSkins.DataSkin _uncache_attrs: def _uncache_attrs(self, names): v=self._v_attrCache for name in names: del v[name] I haven't tested any of this yet. And I realized just after I sent it that the method should be more like: def _uncache_attrs(self, names): v=self._v_attrCache for name in names: if v.has_key(name): del v[name] -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZPatterns implementation question: images attributes?
Zope mailing lists wrote: I have a specialist (actually, EMarket has a specialist grin) that manages objects that from a design point of view I think should have a couple of Images as attributes (thumbnail and fullsized images of the product). The question is, how do I implement this using ZPatterns? Currently all of the other object data is pulled from an SQL database. I don't mind storing the Images in the ZODB, but I'm having a hard time finguring out how I would implement that. Pointers or alternate design suggestions welcome. Here's the simplest approach that I can think of. Stick all your images in a BTree Folder somewhere convenientm like /Images. Name all the images "image-NN" where NN is a unique number. Make a couple of columns in your database (or whatever) for thumbnail_id and large_image_id. You'll store the image ids in these. Use some SkinScript in that Specialist you mentioned that gets the thumbnail_id and large_image_id for a particular object, and also makes available the thumbnail and large_image. WITH QUERY get_thumbnail_for_object_SQL(primary_key=self.id) COMPUTE thumbnail_id=thumbnail_id, thumbnail=Images[thumbnail_id] OTHERWISE LET thumbnail_id='', thumbnail=Images.missing_thumbnail Note here that I could have had just "thumbnail_id," at line 2. Also, note that I'm assuming you have an image called missing_thumbnail in the Images folder. Do likewise for large images. This approach assumes that you're not considering images or thumbnails to be first-class domain objects in your system, but just attributes of your main objects. Thus, you won't be wanting to store other data that is pertinent to images. If you do want to do this, you should use a more complex design where Images have their own specialist. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] updated main.dtml for PlugIns product for Zope 2.3
I've put up a new main.dtml file for the PlugIns product (related to ZPatterns), for use with Zope 2.3. This replaces the previous file posted at the same URL. http://www.cat-box.net/steve/main.dtml The change makes the odd-even table row styles work consistently even when there are plug-ins in the plug-in container. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] updated main.dtml for PlugIns product for Zope 2.3
Steve Alexander wrote: I've put up a new main.dtml file for the PlugIns product (related to ZPatterns), for use with Zope 2.3. This replaces the previous file posted at the same URL. http://www.cat-box.net/steve/main.dtml The change makes the odd-even table row styles work consistently even when there are plug-ins in the plug-in container. And just updated again, to keep pace with the changes in CVS. I'll be keeping the file at that URL generally up to date with the changes to main.dtml in CVS, at least until 2.3 beta is released. I won't bother announcing more changes to this list, unless they are large and significant. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ComputedAttribute
Martijn Pieters wrote: But because _v_* variables don't get pickled, another thread will never see them. If you want non-persisting (volatile) variables shared between threads, you'll have to devise your own mechanism for assuring the thread-safety of those variables. Or, instead of devising your own mechanism, you can borrow someone else's: http://www.handshake.de/~dieter/pyprojects/zope/SharedResource.html Thanks Dieter! -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Zope-2.3a2 and Loginmanager
Ulrich Eck wrote:
hi out there,
i just setup a box with Zope-2.3a2 and Loginmanager.
didn't work because of Changes in AccessControl.User:
- Super doesn't exist anymore (is emergency_user the replacement ??)
- Zope-2.3a2 installs itself with a file "inituser" as access-file,
AccessControl.User.py refers to "access" in
line 372: info = readUserAccessFile('access') --- is this a bug ???
See the message Bill Anderson sent to this list last month:
http://lists.zope.org/pipermail/zope-dev/2000-December/008334.html
Also, in future, please do not send html mail to this mailing list; send
it in plain text.
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[Zope-dev] patch to bring ZPatterns UI in line with 2.3 from CVS
If you're using ZPatterns or PlugIns with Zope 2.3 from CVS, you can update most of the ZPatterns user-interface to the new style be replacing lib/python/Products/PlugIns/www/main.dtml with this file: http://www.cat-box.net/steve/main.dtml -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] New UI for 2.3
I think the new UI for 2.3 is great improvement over 2.2. I'm already finding the sorted tables of folder contents useful, and having the add new items select at the top saves time. However, I do not like the 3-frame interface. I feel that the top frame is wasted space. The Zope logo and "Logged in as username | Logout" could as easily go at the bottom of the tree-view frame on the left. This would leave extra screen space for doing work. I realize that I can make the frame smaller by dragging it with my mouse. I do a lot of TTW development, and I think I might find that cumbersome, so I guess I'll be hacking the top frame out of my management interface :-) I also much prefer blue to black as a background colour for the tabs and the "Root Folder" link. The black seems a bit overbearing. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] When to use Rack , Folders w/Customize, etc.
Johan Carlsson wrote: Hi, Reading up on ZPatterns I'm still confused about some thing's (sometimes more, sometimes less). I wonder: When to use Rack, Folders w/Customize, attribute provider, sheetproviders etc. In which solution do I get ZODB dependens. Folder w/ Customizer support. When you use this, the DataSkin instances appear in the ZODB, and look like normal ZClass (or whatever) instances. One important aspect for some of my applications are to be as "virtual" as possible. Use Specialists. Specialists contain Racks. Each Rack manages a particular class of objects. You can store objects in the ZODB inside the Rack, or alternamtively, you can get the data from external sources. You can also combine both kinds of data to provide the attributes for a single object. I've just completed a fairly complex ZPatterns project, designed broadly according to Coad / ZPatterns / wisdom from PJE . I used both approaches, and, based on that experience, I suggest you use the Specialists approach unless you have a pressing need to have your dataskin instances "rooted" in the ZODB. In the latter case only, use Folder w/ Customizer support. Other the other hand, if you want to design a "normal" Zope application, but just get the flexibility of using Attribute Providers and Skinscript to coordinate your dataskin instances, then use Folder w/ Customizer support. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZCatalog and 'fuzzy logic'
Morten W. Petersen wrote: Is there anyone who could try to give an estimate of how long it would take to add fuzzy logic (regexp-like) searching capability to the ZCatalog? And reasoning as to why would be appreciated. ;) Right now, you could use an External Method to apply a regex match to each unique value in a field index in a Catalog, and return the appropriate Catalog Brains for each match. This is as easy as called uniqueValues() on the catalog, iterating through the unique values to filter them, and then searching the catalog with the results of the filter as the constraint for that fieldindex. This would minutes and hours to implement and test, and would execute in O(number of unique field values) time, for many values of the fieldindex, which should remain acceptably fast where you have a catalog with many items, most of which have fields drawn from the same (small) set. If you want to search a TextIndex using a regex, or you want to search for a pattern among a number of fields of the same item, then you're into an algorithm that would execute in O(number of cataloged items) time. That could get very slow for any sizable catalog. The other option for searching a TextIndex is to use extensions to the NEAR and AND and OR operators that are currently supported. I guess it all depends what you mean by "fuzzy matching". -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Zope from CVS for Windows
Toby Dickenson wrote: On Sun, 07 Jan 2001 10:39:45 +, Steve Alexander [EMAIL PROTECTED] wrote: Is anyone regularly building Zope from CVS for Windows? I want to try something out on a Zope 2.3 build on windows, but I don't have easy access to windows development tools. I think you may be out of luck, unless you can get hold of Microsoft Visual Studio 6.0 Thanks. I can borrow a machine with VS 6 on it. However, I've never used visual studio before. Are there any instructions available for how to build zope using visual studio 6? Tnanks. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Easy SQL question
[EMAIL PROTECTED] wrote:
I believe that this is close
dtml-call "REQUEST.set('phrase_id', foo)"
dtml-in expr="langtest()"
dtml-var expr="_['sequence-item'].renderText"
/dtml-in
but is foo supposed to be my var of whatever I want passed ?
how do I pass the variable for phrase ID ( via a variable and changed per
request ) to the language test and display the results so the user never
knows .
I think I am close just missing the obvious I think anyhelp ?
You need to explicitly pass in arguments to a ZSQL Method as keyword
arguments. So, the following will probably work.
dtml-in expr="langtest(phrase_id=phrase_id)"
dtml-var expr="_['sequence-item'].renderText"
/dtml-in
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[Zope-dev] Zope from CVS for Windows
Is anyone regularly building Zope from CVS for Windows? I want to try something out on a Zope 2.3 build on windows, but I don't have easy access to windows development tools. If you can help, please get in touch. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] __bobo_traverse__, new ZCatalog and ZClasses
Steve Alexander wrote: Zope 2.3, from cvs on 2000-12-24, patched with Chris P's latest ZCatalog stuff. I'm getting a bad interaction between ZClasses, ZCatalog and __bobo_traverse__. I have some ZClasses that are accessed via a container that implements __bobo_traverse__. The problem is that, although I can get to the ZClass instances by typing a URL into by browser, I get a security error when I try to get to them using restrictedTraverse. This causes a problem, as it means these instances cannot be catalogued in a ZCatalog, because ZCatalog now uses restrictedTraverse to get an object for indexing. The zope security validation gets stuck between not knowing for sure what the object's container is (according to comments from Traversable.py), and ZClasses not returning anything for __roles__. ZPatterns jargon paragraph: All this causes a problem if you want to use the ZPatterns idiom of ZClass DataSkins in a Specialist, catalogued using a ZCatalog. You can get around it by providing a __roles__ attribute using SkinScript. In the latest ZCatalog product from CVS, this workaround is no longer needed. When a ZCatalog tries to catalog an object, it first tries to get to it using restrictedTraverse, and if that fails, it uses REQUEST.resolve_url as a fallback. REQUEST.resolve_url gets to the DataSkin in the Specialist without raising a security error. Is there some bug in the ZClasses __roles__ machinery? When does __roles__ get set on objects or classes anyway? I've found the description of what __roles__ are used for in the old Trinkets tutorial document. I think things have moved on a bit since then, though. I'd still like to know the answer to these two questions. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns: patch for OLD['name'] for Zope 2.3
Something has changed in the way Zope 2.3 handles the __getitem__ protocol. This breaks SkinScript's use of OLD. The fix is to patch Agents.py so that the class _memento explicitly provides a __getitem__ method. ZPatterns may need similar fixes elsewhere. See my message to zope-dev earlier this week about the difference in using __getitem__ on Dataskins from a Specialist and in the ZODB. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net *** Agents.py.original --- Agents.py *** *** 326,332 'memento_exprs': 'Keeping:', 'handle_set_for':'Setnbsp;Attrs:' } ! class _memento: pass _emptyMemento=_memento() --- 326,336 'memento_exprs': 'Keeping:', 'handle_set_for':'Setnbsp;Attrs:' } ! class _memento: ! __allow_access_to_unprotected_subobjects__=1 ! def __getitem__(self, name): ! return self.__dict__[name] ! _emptyMemento=_memento()
[Zope-dev] ZPatterns: SAVING doesn't tolerate missing attributes
In SkinScript such as
WHEN eventspec CALL expression SAVING mementolist
if any of the mementos in mementolist are not found, the script raises a
KeyError.
I'd like a way of saving a memento if it exists, or NOT_FOUND otherwise.
For example, an Executive might have a CompanyCar.
WITH CompanyCars.getCar(self.car_id) or NOT_FOUND COMPUTE
car=RESULT,
car_registration=registration
OTHERWISE LET
car=NOT_FOUND,
car_registration="no car"
When an Executive changes her car for a different one, I want to perform
certain actions on the old car, and certain on the new car:
WHEN OBJECT CHANGED CALL
HAS_CHANGED('car_id') and
(self.car_id and CompanyCars.getItem(self.car_id).decommission(),
ORIGINAL['car_id'] and OLD['car'].commission())
SAVING car
However, I can't do this if the executive is being assigned a car from a
state of having no car. It fails with a KeyError because the ZPatterns
machinery can't save "car".
--
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Re: [Zope-dev] ZPatterns: SAVING doesn't tolerate missing attributes
Steve Spicklemire wrote:
Hi Steve,
Could you let some other value represent no car? (e.g., _.None?).
untested...
WITH CompanyCars.getCar(self.car_id) or NOT_FOUND COMPUTE
car=RESULT,
car_registration=registration
OTHERWISE LET
car=_.None
car_registration="no car"
WHEN OBJECT CHANGED CALL
HAS_CHANGED('car_id') and
(self.car_id and CompanyCars.getItem(self.car_id).decommission(),
ORIGINAL['car_id'] and (OLD['car'] and OLD['car'].commission()))
SAVING car
Would that work?
Sure, that would work.
The workaround I've chosen is to use
CompanyCars.getItem(ORIGINAL['car_id']).commission()
in place of
OLD['car'].commission()
Oh, and I jsut noticed, I had commission and decommission the wrong way
around in the example :-)
I'd still prefer SAVING to tolerate not-found attributes, though.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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[Zope-dev] RFE: Make PythonScripts.standard available from DTML _.standard
This is an RFE for Zope 2.3. I'm posting it here for discussion, rather than in the Collector. In the new PythonScripts product (that is a standard part of Zope 2.3) there is a standard utility module that can be imported into a Python Script with import Products.PythonScripts.standard or from Products.PythonScripts.standard import * It contains useful functions such as those for text formatting (html_quote, url_quote_plus, and so on). It also contains the DTML class for creating temporary chunks of restricted DTML. These functions would be really useful as part of the DTML _ namespace variable. I sometimes find myself wanting to use html_quote in a DTML expression. I'd also be able to use these functions from ZPatterns SkinScript. The PythonScripts product could add these functions to the _ namespace variable at product init time, so there would be no need to change the DocumentTemplate modules. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RFE: Make PythonScripts.standard available from DTML _.standard
Steve Alexander wrote: The PythonScripts product could add these functions to the _ namespace variable at product init time, so there would be no need to change the DocumentTemplate modules. And here's a patch: Just add these lines at the end of lib/python/Products/PythonScripts/standard.py from DocumentTemplate.DT_Util import d import standard d['standard']=standard del standard Of course, you could add similar lines to PythonScripts/__init__.py, or in a completely new "enable python scripts standard module with dtml" product. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RFE: Make PythonScripts.standard available from DTML _.standard
Chris Withers wrote: If you have something like that, wouldn't it be better, more readable, etc, for it to be moved intop a python script, even if that script was only 1 line long? eg: dtml-if "mysomething(_['title_or_id'],_.standard.html_quote(absolute_url()+_[id]))" You are being deliberately Byzantine there! Not to mention that _['title_or_id'] is equivalent to just title_or_id. However, I agree with you in principle. I've had other, much simpler, cases where I want to html_quote just a part of something. I can't put my finger on an example right now, so that does weaken my case a little :-) -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] BTree Folders
Chris Withers wrote: Right, BTree folders wise, what I'm looking for is to have, in effect two Contents tabs for one BTree folder object, one showing all contained items of a particular meta_type (with the BTree Folder's interface to deal with lots of objects), and the other containing all other items in the folder (DTML Methods, Gifs, etc, with a normal folder's interface). What's the best way to do this? If you're using ZPatterns anyway, you might like to look at PlugIns. The idea with PlugIns is that a PlugIn manager delegates the handling of objects it contains to its various PlugIns. Typically, a PlugIn will claim objects based on the object's meta-type. PlugIns appear in the user-interface as separate tabs. See the Customizers and Data Plug-ins tabs in a Folder w/ Customizer Support instance for an example. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] SkinScript reference in two-up postscript
Hi folks, http://www.cat-box.net/steve/skinscript_ref-0-4-3b2.ps.gz This is a two-up A4 postscript version of PJE's most useful SkinScript reference. It prints out to four landscape-orientation A4 pages. http://www.cat-box.net/steve/skinscript_ref-0-4-3b2_letter.ps.gz This is similar, but for letter size paper. Also available in pdf: http://www.cat-box.net/steve/skinscript_ref-0-4-3b2.pdf http://www.cat-box.net/steve/skinscript_ref-0-4-3b2_letter.pdf The files were produced from the skinscript help page of ZPatterns 0-4-3b2, printed to a file with Mozilla, and then converted to 2-up pages using impose. The pdf versions were produced using ps2pdf on the postscript files. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns: __getitem__ on a DataSkin instance
Let's say I have a DataSkin-derived ZClass that has the attribute "forename" (in a dataskin attribute propertysheet). If I get an instance of this ZClass from the ZODB (set up to use a Folder w/ customizer suppport), I can refer to the "forename" attribute using dtml-var "this()['forename']". However, if I get an instance of the same class from a Specialist, dtml-var "this()['forename']" gives me Error Type: AttributeError Error Value: __getitem__ Any idea why there's the difference? Can the latter case be fixed? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: ZPatterns: __getitem__ on a DataSkin instance
Steve Alexander wrote: Let's say I have a DataSkin-derived ZClass that has the attribute "forename" (in a dataskin attribute propertysheet). If I get an instance of this ZClass from the ZODB (set up to use a Folder w/ customizer suppport), I can refer to the "forename" attribute using dtml-var "this()['forename']". However, if I get an instance of the same class from a Specialist, dtml-var "this()['forename']" gives me Error Type: AttributeError Error Value: __getitem__ Any idea why there's the difference? Can the latter case be fixed? A workaround, using the ever-flexible skinscript: I've defined __getitem__ through skinscript and a PythonScript. SkinScript: WITH SELF COMPUTE __getitem__=getattr PythonScript: parameter list: index return getattr(index) -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Re: ZPatterns: __getitem__ on a DataSkin instance
Steve Spicklemire wrote: Hi Steve, Hmm.. is the 'id' of your PythonScript also getattr? Yes. I forgot to mention that. And, I realized just after posting the email to the list that calling a method "getattr" is asking for trouble :-) Actually, my workaround doesn't work except in the most trivial cases. My code was making more errors as Zope tried to look up the _ variable via __getitem__ and thus via my PythonScript. I've ended up using a dtml-if to choose whether to use a dtml-with stuff mapping block or just a plain dtml-with stuff block. I'd still like to know why a Dataskin from a specialist is behaving differently from one in the ZODB in this respect. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns: catching exceptions raised by triggers
Let's say I have a trigger that is called to ensure that what something is changed to holds true. I use some skinscript like this: WHEN OBJECT ADDED, CHANGED CALL self.ensure_conditions_hold() I write the ensure_conditions_hold method so that it returns None if everything is ok, but raises an exception if there is a problem with the new state of the object. That's all fine. However, I want to catch this exception in my application, and handle it in a friendly way. However, I've tried using dtml-try blocks and try: except: blocks from Python Scripts, and either way, I cannot catch the exception. It still causes Zope to return the standard_error_message screen. I can only speculate that this is all due to the way that triggers get executed at the end of transaction. I guess I'll have to validate the data twice if I want to provide helpful feedback to the user. Stranger still, the error message is reporting itself to have a strange content-type, so my browser is asking me if I want to download it as a file; I'm pretty sure this isn't related to the skinscript though, as I can get the same effect with other errors. How do I catch an error raised by a Trigger? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns; possible bug?
I have a specialist "Instructors".
It holds a rack, containing DataSkin-derived ZClasses of meta-type
"Instructor".
The Instructor class has a DataSkin Attribute propertysheet called
"Basic", and this has properties for forename, surname, address, areas.
I have some skinscript in the Instructors specialist:
WITH SELF COMPUTE
name='%s %s' % (forename, surname),
areas_comma_sep=_.string.join(areas, ','),
address_lines=_.string.join(address, '\n'),
address_comma_sep=_.string.join(address, (', '))
WITH SELF COMPUTE
__roles__=_.None
# XXX publicly visible!! Nutter!!
# change __roles__ to ('Operator',) later.
This works fine. The __roles__ bit is a hack to make Zope 2.3 ZCatalog
play nicely with the Specialist and __bobo_traverse__.
I have some other skinscript that keeps an instructors index in a
ZCatalog inside Instructors.
WHEN OBJECT ADDED CALL
Catalog.catalog_object(self, _.string.join(self.getPhysicalPath(),'/'))
WHEN OBJECT DELETED CALL
Catalog.uncatalog_object(_.string.join(self.getPhysicalPath(),'/'))
WHEN OBJECT CHANGED CALL
Catalog.uncatalog_object(_.string.join(self.getPhysicalPath(),'/')),
Catalog.catalog_object(self, _.string.join(self.getPhysicalPath(),'/'))
This worked fine.
When I changed the first skinscript to make one WITH SELF statement, I
got some strange inconsistencies:
WITH SELF COMPUTE
name='%s %s' % (forename, surname),
areas_comma_sep=_.string.join(areas, ','),
address_lines=_.string.join(address, '\n'),
address_comma_sep=_.string.join(address, (', ')),
__roles__=_.None
On changing an instructor's properties using manage_changeProperties on
its propertysheet, I'd see the change in the instructor. However, the
ZCatalog metadata would always have the most recent value for "surname",
but the last value for "name".
Changing the skinscript back to using two statements makes cataloging
function normally again.
I could tell when the catalog was doing by instrumenting the recordify
method of Catalog.py:
def recordify(self, object):
""" turns an object into a record tuple """
print "recordify %s" % (object)
record = []
# the unique id is allways the first element
for x in self.names:
try:
attr = getattr(object, x)
if(callable(attr)):
attr = attr()
except:
attr = MV
print " appending %s:%s" % (x, attr)
record.append(attr)
return tuple(record)
A typical (wrong) debug output would be:
recordify Instructor instance at 86c16b0
appending id:instructor-977678608
appending meta_type:Instructor
appending bobobase_modification_time:2001/01/04 17:26:01.35408 GMT
appending name:Bob Collins8
appending surname:Collins9
appending areas_comma_sep:M12
This is after changing the surname of the instructor from "Collins8" to
"Collins9".
The cause of the problem? I don't know. Maybe I'm doing something silly.
I think what is happening in the broken example is that when the zope
security machinery asks for __roles__, name is also computed. The
machinery must request __roles__ before changing anything.
After that, surname gets changed. However, changing "surname" only
invalidates "surname" in the cache; not anything that is computed using
surname.
At the end of the transaction, when the triggers are called, name is
already in the dataskin's attribute cache, so it does not get recomputed.
In the working example, when __roles__ is requested, it is in a
different skinscript statement, so it does not cause "name" to be
computed. Thus, "name" can be computed freshly after "surname" is set.
Is this behaviour intended, is it a bug, or is it an unimplemented feature?
Thanks.
Oh, almost forgot: ZPatterns-0-4-3b2
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
I
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[Zope-dev] Re: Objects with multiple parents and storage flexibility, ZPatterns?
Chris Withers wrote: Hi, Once again I'm back at trying to solve this problem, hopefully with a little more knowledge this time ;-) What I'd like: 'Zope' objects of type 'X', which can have multiple parents and can contain other objects of type 'X', where storage isn't necessarily tied to the ZODB but where the objects have a normal properties page (in terms of use, again, it'd be nice if it could be stored anywhere) and participate in all the normal Zope security and management interface processes, and they need to be catalogable. This sounds like ZPatterns to me, am I right? If so, it appears there are two choices: 1. Folder w/Customiser Support (FwCS ;-) and DataSkins 2. Specialist with one or more Racks and DataSkins Which one of these would be most appropriate? If you use a Folder w/ Customizer Support, you'll need to create all the DataSkin instances in the ZODB, just as if they were normal ZClass (or whatever) instances. Thus, the instances all need to be "in there" to start with. You can't add data to your external database, and expect a new Dataskin instance to pop up in the ZODB. This is what is meant by "When using Folder with Customizer Support, DataSkins are anchored in the ZODB". FwCS containg DataSkins that also mix in the Folder class sound like they'd give a closer approximation to 'real Zope objects', but Racks sound like the only way that objects of the same metatype can come from different sources (eg, some objects of type 'X' from ZODB, some from SQL, some from LDAP ,etc) and seem to be more flexible in general, but can I have DataSkins that nest stored in a specialists' rack, eg: You can get the data for your dataskins from a variety of sources, whether you choose to use Specialists or Folder w/ Customizer Support. However, if you use Specialists, you can have the DataSkin instances appear only when requested. Thus, you can add records to your external database, and thereby have new Dataskins available from your application. http://server:8080/specialist/dataskin1/dataskin2 How about doing something like: http://server:8080/specialist/dataskin1/dataskin2/manage You can do this by providing the __bobo_traverse__ protocol, using SkinScript in your Specialist to give objects of the type of dataskin1 an appropriate __bobo_traverse__ method. I briefly described this on zope-dev a couple of days ago. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] dynamic permissions in zope
Steve Alexander wrote: I believe the latest LoginManager allows you to specify what roles a user has, and compute these each request, based on the details of the request. This is probably more useful than having dynamically computed permissions; While I can see how a user's roles will vary according to where they are, what they are doing and when they are doing it, I cannot see why permissions need to change in that way. However, you mention that you are new to Zope. ZPatterns can be difficult to understand and get into. Other than the creators of ZPatterns, I haven't heard of anyone using this computed permissions system. What I forgot to mention: LoginManager is a Zope product that is built using ZPatterns, another Zope product. When you are doing advanced things with LoginManager, you need to know how ZPatterns works. There are a couple of HOWTO documents on using LoginManager. It will be only a small change to alter the "userRoles" method that returns the roles a user should have to calculate these roles based on other criteria. See these documents for information about how to set up LoginManager. http://www.zope.org/Members/dlpierson/sqlLogin http://www.zope.org/Members/jok/SQL_based_LoginManager -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ANNOUNCE: PartitionedFileStorage
Shane Hathaway wrote: BTW, Evan helped me find and correct a bug. You'll only run into it if you set your partition size to less than the size of the largest ZODB objects. The new version of FileStorage.py in PartitionedFileStorage for 2.3 overwrites some of the changes made the FileStorage locking protocol in CVS. These are the ones using _commit_lock_acquire _commit_lock_release. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] PartitionedFileStorage - Eek!
Shane Hathaway wrote: Should be, although I just realized I don't know whether 0.0.2 was intended for Zope 2.2 or 2.3. There is no difference between the PartitionedFile.py files in the 2.2 and 2.3 versions, so I guess 0.0.2 will do as well for either. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZCatalog reindex_object
Chris Withers wrote: Michael Bernstein wrote: reindex_object - should be called when an object is edited Hmmm... didn't see this method listed in the interfaces wiki. Where did you find it? reindex_object is a method of the mix-in class CatalogAwareness. lib/python/Products/ZCatalog/CatalogAwareness.py line 191 def reindex_object(self): """ Suprisingly useful """ self.unindex_object() self.index_object() I just inserted a call to catalog_object which did the job but I wonder what the difference between index_object abd reindex_object and catalog_object is? I think calling index_object should work, as a well-implemented catalog will do the right thing. However, calling reindex_object makes your intentions more explicit. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Updating a ZCatalog when objects in it change their path
Chris Withers wrote: However, the only way I could find to solve it was to add a manage_afterAdd method to Squishdot Sites which recatalogued all postings. This is a _lot_ more resource intensive than it needs to be, since I don't actually want to recatalog all postings (quite expensive when there are 3000+ of them ;-), I just want to modify the paths that ZCatalog has stored. Is there any way to do this? There probably should be ;-) Look in the new ZCatalog product (released for testing a few weeks ago), in the manage_normalize_paths method of ZCatalog.py (line 603). This method goes through every item in the Catalog, and checks to see if its path needs to be changed to the new convention of using the physical path to the object. You could use a modified version of this method to do what you want, calling it from manage_afterAdd. You may need to store the old path to the ZCatalog instance in an attribute, so you'll know how to change the paths. The following code should help, although I haven't tested it. It is shamelessly cribbed from Chris P's manage_normalize_paths method. paths = self._catalog.paths uids = self._catalog.uids for path, rid in uids.items(): new_path=_method_to_return_new_path_after_add(path) del uids[path] paths[rid] = new_path uids[ppath] = rid -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZPatterns question
Steve Spicklemire wrote: CS 2. Is it planned to provide something like a virtual folder CS which acts like a normal object manager but is controlled via CS ZPatterns (so actually something like Folder with Customizer CS Support just without the "anchor" in ZODB. (would also CS require some mechanism asked for in 1.) Hmmm... I'm not sure what you're after here. Why not just use a Specialist? In what sense do you want it to be virtual? (Are you looking for a dynamic traversal interface that would allow you to map URLs to objects that are managed by ZPatterns? Can you give an example?) Reading this just after reading the source to Specialists.py, I had a thought; and tried it out; and it works! :-) You can use SkinScript to define __bobo_traverse__ for a particular kind of DataSkin in a Specialist. For example: WITH SELF COMPUTE __bobo_traverse__=traversal_method Then, define a method in the specialist (or rack) called traversal_method. I used a PythonScript, and gave it the parameter list "REQUEST, name". Make your method return the appropriate object to traverse to from your DataSkin, depending on the name passed. Something like return getattr(container.path.to.somewhere, name) That's the simple version, and it won't give the traversed-to object the correct context most of the time. To do that, I'd need to use an external method, and use the __of__ method to give the returned object an appropriate context. However, it is a start, and proves that it can be done. Take a look in the __bobo_traverse__ method of Specialists.py (from ZPatterns) for a good algorithm for traversal. The variable _marker is almost always a class attribute initialized to [], to make a unique object, as a sentinel. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZPatterns question
Steve Alexander wrote: return getattr(container.path.to.somewhere, name) That's the simple version, and it won't give the traversed-to object the correct context most of the time. To do that, I'd need to use an external method, and use the __of__ method to give the returned object an appropriate context. However, if all you are doing is saying "does this object have the named attribute? if not, get it from another specialist", and you're using Specialist.getItem() to do the latter part, then the object you want comes ready-wrapped in the appropriate context, courtesy of the Rack that gives it to you! -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] __bobo_traverse__, new ZCatalog and ZClasses
Zope 2.3, from cvs on 2000-12-24, patched with Chris P's latest ZCatalog stuff. I'm getting a bad interaction between ZClasses, ZCatalog and __bobo_traverse__. I have some ZClasses that are accessed via a container that implements __bobo_traverse__. The problem is that, although I can get to the ZClass instances by typing a URL into by browser, I get a security error when I try to get to them using restrictedTraverse. This causes a problem, as it means these instances cannot be catalogued in a ZCatalog, because ZCatalog now uses restrictedTraverse to get an object for indexing. The zope security validation gets stuck between not knowing for sure what the object's container is (according to comments from Traversable.py), and ZClasses not returning anything for __roles__. ZPatterns jargon paragraph: All this causes a problem if you want to use the ZPatterns idiom of ZClass DataSkins in a Specialist, catalogued using a ZCatalog. You can get around it by providing a __roles__ attribute using SkinScript. Is there some bug in the ZClasses __roles__ machinery? When does __roles__ get set on objects or classes anyway? I've found the description of what __roles__ are used for in the old Trinkets tutorial document. I think things have moved on a bit since then, though. Some relevant code snippets: Traversable.py t=get(object, '__bobo_traverse__', N) if t is not N: o=t(REQUEST, name) # Note we pass no container, because we have no # way of knowing what it is if (restricted and not securityManager.validate( object, None, name, o)): raise 'Unauthorized', name ZopeSecurityPolicy.py, line 123: # Try to get roles roles=getattr(value, '__roles__', _noroles) if roles is _noroles: # We have an object without roles. Presumabely, it's # some simple object, like a string or a list. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RE: objectIds accessiblilty and a proposal
Brian Lloyd wrote: This comes up often enough that I'm inclined to do something about it for 2.3. I propose that objectIds (and objectValues) will not be directly accessible via the Web in 2.3. For xml-rpc applications, it should be a simple enough task to create a Python Script (or even a DTML Method) that *is* Web accessible to relay that information if it is needed. Thoughts? I have no objections to that. On a related issue, what about other dtml snippets that people generally don't want as web accessible, such as standard_html_header ? On my pie-in-the-sky zope wishlist: What I'd like is a new tab for zope objects that allows me to say which protocols the object is accessible from, and what to do if not. For example: access route accessible?action called from template yes http on port 8080no return 404 ftp yes Another example: access route accessible?action called from template yes http on port 8080no redirect to URL1 If medusa is ever extended to have http and https on different ports, then you could declare different accessible states and actions for the different http ports. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RE: objectIds accessiblilty and a proposal
Dieter Maurer wrote: Steve Alexander writes: On my pie-in-the-sky zope wishlist: What I'd like is a new tab for zope objects that allows me to say which protocols the object is accessible from, and what to do if not. For example: access route accessible?action called from template yes http on port 8080no return 404 ftp yes Another example: access route accessible?action called from template yes http on port 8080no redirect to URL Sounds good to me. With the exception that I do not like the explicit port references. I would like to see there an indirection (e.g. use a name which can be mapped to a port at a central place). I agree, that's a good idea. The accessible state, and the action for a particular access-route could be acquired, like the current security settings. So, I'd have to say in only a single folder's accessing tab that all objects below that folder that are invisible to web traversal should return a 404. Isn't there already a fishbowl proposal for this kind of thing? Did it get anywhere? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] IMPORTANT! Zcatalog path handling changes in 2.3
Christopher Petrilli wrote:
On 12/18/00 4:24 PM, "Steve Alexander" [EMAIL PROTECTED] wrote:
Doesn't work with 2.3 from CVS, 2000-12-18 21:21 UTC
ACK, I forgot that I also revealed afew bugs in other systems :/ I thought
that I could just package up Zcatalog, but apparantly not Let me work on
coming up with something new.
I can get your new ZCatalog to install and run with Zope 2.3 from CVS by
commenting out the last two lines of
lib/python/Products/ZCatalog/__init__.py:
#context.registerHelp()
#context.registerHelpTitle('Zope Help')
Of course, I miss out on getting help with the new API if I do this :-)
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPatterns, ZClasses, Specialists: Assigning responsibilities
Itai Tavor wrote: I have the following ZClasses, with matching Specialists: Product, Graphic, Order, OrderLineItem. When a customer adds a product to their order, they have to provide a graphic file which will be printed on the product (imagine buying a lunch box with your cat's photo on it). The Graphics Specialist can provide a addGraphicSnippet form. But who's responsible for asking for this graphic when adding the product to the order? Is it still the Product object? But a Product turns into a Product-with-Graphic only when it's a part of an order, so is it correct for the Product to even know about Graphics? the alternative is to move the addToOrder methods to either Order or OrderLineItems, but this doesn't make any more sense because these would then have to know a lot more about a Product than is good for them. Any ideas? Sounds to me like you have a new type of Product. You have your basic products (of which there are many kinds), and you have ProductWithGraphic products. A ProductWithGraphic is a "calculated product": it is composed of a basic product and a graphic. Its cost, delivery time, packing charge, and so forth, are calculated based on the combination of the basic product and the graphic. To the rest of the application, a ProductWithGraphic is just another kind of product. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] more on keyword indexes
Hi Josh, I use KeywordIndexes a lot. Just for kicks, I implemented what you describe below in Zope2.3 grabbed fresh from CVS just now. I used DTML Documents for the objects to catalog, and I added a lines property called KW to each one. I queried the catalog using syntax like dtml-in "Catalog(KW=['one', 'two'])" or dtml-in "Catalog(KW='purple')" Josh Zeidner wrote: Hello, I did a little more investigiation into the problem, and couldnt really find any documentation anywhere on what the actual semantics are of keywords and how they are queried. For instance: I have three classes and each has an keyword index named KW: ObjectOne:KW = ['one','blue','furry'] ObjectTwo:KW = ['two','flying','purple'] ObjectThree: KW = ['three','one-eyed','purple'] If I were to query the ZCatalog with the following set of words: ['purple'] I would expect to get: ObjectTwo ObjectThree Yes, that's what you get. Right? If I query the database with ['one','two'] ( if this type of thing is at all possible ), I get : ObjectOne ObjectTwo Yes, that's what you get. This seems like the obvious result: BUT: it depends if you want a AND/OR type search. It is an OR search. I could also expect to get nothing( if its an AND type search because no records match 'one' and 'two' ). Here is better example, what if I queried: ['purple','one-eyed']. Would I be expecting only ObjectThree or [ ObjectThree, ObjectTwo ] ( because they both match the keyword purple( a logical set-intersection ) ). You get ObjectTwo and ObjectThree. Also I found the keyword indexes to have some more obvious bugs. If I only used one keyword for the matching critiria, for instance if I used 'purple' , I would only get ObjectTwo. I get ObjectTwo and ObjectThree, as I'd expect. Is anyone else using keyword indexes? In what way are you using them? All sorts of things. One useful use is to limit a query on a SiteIndex type of catalog to just a sub-tree of your site. See my message to zope-dev on October: http://lists.zope.org/pipermail/zope-dev/2000-October/007535.html -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] keyword indexes
Josh Zeidner wrote: Hi, Currently I am wrestling with "keyword" indexes in ZCatalogs. How do I query the ZCatalog for all records of objects indexed on a particular keyword. For instance if my index is named MediaKeyword ive tried: dtml-in "Catalog.searchResults( MediaKeywords = ['ouch'] )" That should work. this has completely unpredictable results. dtml-in "Catalog.searchResults( MediaKeywords in ['ouch'] )" this returns all indexed objects! That won't work. The python MediaKeywords in ['ouch'] will be evaluated first, and will give a calue of 0 or 1. If MediaKeywords is a list, then it will always give 0, because there is only one item in ['ouch'], and that is the string 'ouch'. What am I doing wrong? Is there a special ZCatalog function for querying keyword indexes? I need some insight into this problem. Are you sure that the keywords are being indexed in your catalog? A good trick is to index the keyword attribute, and also store it as metadata. That way, you can look through your search results at the keywords the Catalog thinks you have. Also, check that you declared MediaKeywords as a keyword index, and that the MediaKeywords attribute in your objects is (or returns) a sequence type such as a tuple or a list. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Python 2 (Zope Unicode) support for 2.2.4
Hi Folks, I've modified Toby Dickenson's patch to let Zope work with Python 2 so that it patches against Zope 2.2.4. http://www.zope.org/Members/stevea/unicode_for_224.patch.gz Toby's page about using unicode and Python 2 with Zope is here: http://www.zope.org/Members/htrd/wstring -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] case insensitive sorts
Andy McKay wrote: Minor nit and patch: I've found that really for me what users want to see is a case insensitive sort of objects, not the current python case sensitive sort. So that the order of objects from dtml-in and tree is a, A, b, B as apposed to A, B, a, b. Anyway Ive patched dtml-in and dtml-tree to do this sort on a ignore_case tag. Is this useful to anyone else? And Ive thought of patching my Zope so this is the default behaviour what does anyone else think. The next thing to patch is ZCatalog... The way I approached this was to have a ZPatterns attribute provider, or a method, that provides a modified version of the value I want to sort on. For example, I have a load of documents and folders with titles like Big Folder brown document "Berries for Cooking" list I wanted to present these sorted by non-case-sensitive first letter or number. So, I made a method "title_for_sorting" that stripped off any punctuation at the start, and returned the first 20 characters in all lower case. In this case, as it was a ZPatterns application, the method was presented as an attribute of the object using some skin-script. I used this attribute as a field-index in my SiteIndex ZCatalog. The reason I mention this is that sometimes case-insensitivity is not enough for sensible sorting. In this case, I had to strip out punctuation too. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] FIX for the infamous __call__ bug - testers needed!
Brian Lloyd wrote: Attached is an updated version of cDocumentTemplate.c. You can drop this into the lib/python/DocumentTemplate directory of your installation and rebuild it - after restarting the Zope site, the __call__ problem should be gone. I'd really like to hear from some folks on this so I can get the 2.2.3 release wrapped up - thanks! I just tested this using a ZWikiPage from ZWiki 0.7.1 that is set for structuredtextdtml and has the following content dtml-with someFolder dtml-var objectIds /dtml-with With the current cDocumentTemplate.so, I get the __call__ error. With the new cDocumentTemplate.so, it works as expected. So in summary, it works for me. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] RFClarification: Security on Product Attributes
Jim Fulton wrote: Strings; fine, at least they're secure, and when they become proper objects in Python 2.0, the problem should go away? Will Python 2.0 let you assign string attributes? % python Python 2.0 (#3, Oct 26 2000, 15:07:09) [GCC 2.95.2 19991024 (release)] on sunos5 Type "copyright", "credits" or "license" for more information. a='' a.foo='bar' Traceback (most recent call last): File "stdin", line 1, in ? TypeError: object has read-only attributes -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] DataSkinAddons 0-0-2 released
DataSkinAddons 0-0-2 http://www.zope.org/Members/stevea/DataSkinAddons Changes: DataSkinAddons 0-0-2, 24 October 2000 DataSkinAddons 0-0-2 works with ZPatterns-0-4-3b1 and Zope 2.2 only Various changes to CatalogTrigger to bring it in line with the new Expressions module from ZPatters 0-4-3b1, and to tidy up some cruft. Thanks to John Eikenberry for contributing to this. Note that CatalogTrigger does not cause a ZPatterns transaction to abort, but instead logs an error, if an object cannot be catalogued or uncatalogued. In some cases, this may be wrong behaviour. Some checkboxes might appear for this in the next release of DataSkinAddons. Until then, use SkinScript if you want to abort the transaction if there is a problem cataloguing or uncataloguing. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Getting all objects matching a given meta_type and more
Morten W. Petersen wrote: I've managed using the ZCatalog now. However, I have a small problem: When I instansiate a ZCatalog at the root of a tree, and search for all objects matching a given meta-type, all the objects in the entire tree are returned. Is there a way to instruct the ZCatalog instance that it should only return objects from within a certin part of the tree, without instansiating a new ZCatalog instance in the given subtree? Yes. Create a keyword index in your catalog called "path_kw_for_catalog". Create an external method called "path_kw_for_catalog" that, for an object, returns a list of strings that uniquely represent the physical path to that object, and to each of its parents by containment. Create an external method "path_kw" that, for an object, returns a string that uniquely represents the physical path to that object. Then, query your catalog using that keyword index, and the results path_kw for the path you want results from under. As an example, path_kw_for_catalog might return ['foo_bar_baz', 'foo_bar', 'foo'] for an object at http://your.server.net/foo/bar/baz In the same example, path_kw would return 'foo_bar' for the object at http://your.server.net/foo/bar I don't know whether you can use the results of string.join(getPhysicalPath(), '/') as a keyword in a KeywordIndex in a ZCatalog. In the following methods, I'm assuming that you can't. They can be simplified if it turns out you can. I'm also assuming that space characters are bad in keyword indexes. Again, I might be completely wrong. I guess I should check. Anyhow, these methods should give you the general idea: from string import join, replace def kw_path_for_catalog(self): keywords=[] pp=self.getPhysicalPath() for p in range(2, len(pp)+1): keywords=keywords+[join(map(fix_bad_chars, pp[1:p]), '_')] return keywords def kw_path(self): return join(map(fix_bad_chars, self.getPhysicalPath()[1:]), '_') def fix_bad_chars(s): return replace(s, ' ', 'x') -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns bug: no help subdirectory in PlugIns
PlugIns-0-4-3b1 (part of the latest ZPatterns release). __init__.py fails because at line 8 context.registerHelp() fails, as there is no "help" subdirectory in the PlugIns product folder. I guess this is an empty directory that got missed off when the whole thing was tarred up. A simple fix is "mkdir help" from the PlugIns directory. -- Steve Alexander Software Enigneer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Xron fragility
The Xron product seems rather "fragile" in use. That is, if things go wrong when an Xron DTML Method is triggered, that method doesn't get rescheduled. An example of this is that my intranet DNS server needed to be rebooted. Xron couldn't look up the appropriate domain name, and stopped working. -- 2000-10-11T08:16:34 PROBLEM(100) Products.Xron.Loggerr Trigger event: http://my.development.server:4080/my_xron_method Trigger time: 2000/10/11 09:14:00 GMT+1 Failed to trigger event. Type=bci.NotAvailable Val=host not found (File: http://my.development.server/my_xron_method/trigger Line: []) None None for None -- 2000-10-11T08:19:04 PROBLEM(100) Products.Xron.Loggerr Failed to disarm event Also, if something bad happens in the Dispatcher thread, the thread dies. Before I leap in and start patching Xron, I'd like to have a discussion about how Xron should handle problems. My first thought is that on errors in the dispatcher thread, Xron should enter an "error state" where it probes every so often to see whether it can resume normal operation. The length of time between probes could increase with each probe, to give good performance with transient problems whilst preventing Xron from choking resources. -- Steve Alexander Software Enigneer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Xron fragility
Chris McDonough wrote: Steve, I am also interested in scheduling... though I haven't looked closely at Xron. The Xron product seems rather "fragile" in use. That is, if things go wrong when an Xron DTML Method is triggered, that method doesn't get rescheduled. Does Xron take an optimistic approach to repeating jobs? In other words, does it assume every job is a one-time job and that the last duty that a repeating job performs is to reschedule itself? It is the Xron DTML Method's responsibility to reschedule itself. It could be its first duty, however. Then again, as all the work happens inside a ZODB transaction, it doesn't matter when the reschedule happens. What does the Dispatcher thread do? Does it fire off worker threads? Xron has a single dispatcher thread. This thread knows how long to sleep for until the next job needs to run. It uses Client.py to run a job. Jobs are Xron DTML Methods. They have a "trigger" method that gets called through the web from localhost, by the Dispatcher thread. Before I leap in and start patching Xron, I'd like to have a discussion about how Xron should handle problems. My first thought is that on errors in the dispatcher thread, Xron should enter an "error state" where it probes every so often to see whether it can resume normal operation. The length of time between probes could increase with each probe, to give good performance with transient problems whilst preventing Xron from choking resources. What are other threads in Xron doing while the Dispatcher thread is hosed? What are the other threads? There are no other threads in Xron. Xron creates a single thread to do all event dispatching. The work is done in Zope ZODB threads (or whatever the correct terminology is). The dispatcher thread communicates with a ZODB thread by using Client to make a web request. Xron usually makes requests as the anonymous user. However, I've patched my Xron to make requests as XronUser by hardcoding (!) the username and password for that in the RPC.py module of Xron. Then, I've manually created a XronUser user in my root user folder. I give XronUser the local roles needed to run methods I want to be scheduled via Xron. This is not the ideal way to make Xron use authentication. I posted a proposed design for that to zope-dev in August. http://lists.zope.org/pipermail/zope-dev/2000-August/006548.html http://lists.zope.org/pipermail/zope-dev/2000-August/006549.html http://lists.zope.org/pipermail/zope-dev/2000-August/006550.html -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Xron fragility
Chris McDonough wrote: As a side note, I do not like the fact that Xron requires you to use special DTML methods. I suppose this is a requirement in this architecture due to the fact they need to be autocataloged, but I don't really like that feature either :-). I think Xron could work with anything that has "trigger" and "disarm" methods, that gets put into the Schedule catalog. What does the Dispatcher thread do? Does it fire off worker threads? Xron has a single dispatcher thread. This thread knows how long to sleep for until the next job needs to run. Do you think this is this any more effective than having a producer thread do a lookup every minute to see what jobs are current, after which it should put the current jobs in a queue? What if you want a small job to be done every 30 seconds? It uses Client.py to run a job. Why is this? This doesn't make any sense to me on its face. Why not just call the method from a separate thread? Which separate thread? Do you create a new ZODB thread? That sounds as if it might use quite a few resources. Is there a Zope API for making ZODB threads call methods on objects, as signalled by other threads? I'm guessing the easiest way to do that is to use Client.py to make a new http request. I see... would it be naive if I were to say that I think that a scheduler should fire off threads of its own and not rely on an external facility to run the jobs? I'd really like to see a scheduler as a standard part of Zope. I think it would be good to have scheduled methods called from within Zope, rather then going through http. I don't know enough about how ZPublisher/ZODB works to know where to start this though. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Help, please!!! __call__ problems with DTML templates
Stephen Simmons wrote: 1.) How do you magically get the DTML context from 'dtml-var A' without having to resort to 'dtml-var "A(_,REQUEST)"' in the templates? Give your class a class attribute of isDocTemp=1. This tells the DTML method calling machinery that you want to receive the namespace as REQUEST as the third argument to your __call__ method. There was a thread on this in zope-dev on and around 26 September, subject "more __call__ ..." In the __call__ methods of different classes, I've seen some code like: 'if REQUEST is None and not kw: REQUEST=self.REQUEST' (from Catalog.py) Your method will usually get called with its third argument as the namespace, or REQUEST. However, sometimes, it may just be called with a "self" argument. The code in Catalog.py is falling back on getting the REQUEST out of the self argument, if it is not explicitly passed a namespace to work with. I can't see any consistency in what these classes are doing, so I don't know what I need to do. Most developers would like more consistency here :-) I'm hoping that all this will be much much clearer for Zope 2.3. That doesn't help much for now though. 2.) How to convert an arbitrary text string into rendered DTML inside a python product method? How do you get the object's properties, REQUEST and acquisition context all in the namespace? I've been trying code like: template = 'span class="purpose"dtml-var purpose fmt="structured_text"/span' dtml = HTML(template, globals()) If all you want to do is render some Structured Text, you can import and use the StructuredText module directly. P.S. ChrisW, searching NIP for "__call__" returns every message with 'call' in it, which is not quite the same thing! For cases like that, I have downloaded the plaintext mail archives as available from http://www.zope.org/Resources/MailingLists I then use unix grep on them to search for just what I need. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Help, please!!! __call__ problems with DTML templates
Stephen Simmons wrote:
2.) How to convert an arbitrary text string into rendered DTML inside a
python product method?
How do you get the object's properties, REQUEST and acquisition context all
in the namespace?
I've been trying code like:
template = 'span class="purpose"dtml-var purpose
fmt="structured_text"/span'
dtml = HTML(template, globals())
rendered = dtml(self, REQUEST)
Here's an except from my Python interactive interpreter:
import DocumentTemplate
my_dt=DocumentTemplate.HTML("""dtml-var "1+a"""")
my_dt(None, {'a':4})
'5'
The object my_dt is callable, and takes the arguments (client,
namespace). You can put a REQUEST in place of the simple dictionary I
used above.
If you're trying this, make sure you have the PYTHONPATH environment
variable set to /your/zope/directory/lib/python
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPatterns: SkinScript discovery
"Phillip J. Eby" wrote:
Just out of curiosity, did you find this out by reading the draft
SkinScript reference documentation on the ZPatterns Wiki?
No. I just guessed.
I think I might have read it in the source the other day too.
I'll take a look at the wiki now:
http://www.zope.org//Members/pje/Wikis/ZPatterns/SkinScriptSyntax
expression
A DTML-style Python expression. As with DTML, the "_"
object is available for access to Python built-ins and
library functions.
Aha!
I'm looking forward to using the new "OTHERWISE LET" clause too, when
the next release of ZPatterns comes out.
Thanks.
At 03:45 PM 10/4/00 +0100, Steve Alexander wrote:
I just found out that you can access all sorts of useful methods in
SkinScript from the magical "_" namespace variable.
Let's say I have a DataSkin that has a propertysheet "journey", which
has a "steps" property of type "lines". I can expose its "steps"
property as an attribute, and also a neatly formatted version of the
same, using this SkinScript:
WITH self.propertysheets.get('journey') COMPUTE
steps=getProperty('steps'),
steps_comma_sep=_.string.join(self.steps, ', ')
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] two-phase-commit question
Kapil Thangavelu wrote: ZOPE_HOME/lib/python/Shared/DC/ZRDB/TM.py Glancing over the Transaction TM mixin class... i noticed a line commit=tpc_abort=tpc_begin i can understand tpc_begin=commit, but the abort seems strange. if an abort happens in the two phase commit the equality doesn't make sense to me. whats going on here? Is this meant to be overidden? Yes. Override the methods that you need to. The rest are given a no-operation default implementation. The class more or less defines an interface. def tpc_begin(self, *ignored): pass commit=tpc_abort=tpc_begin The assignment you see is just a short-hand way of saying that commit, tpc_abort and tpc_begin have the same method signature and the same implementation -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: [Zope] Restricting URL access to objects that are not complete web pages
Stephen Simmons wrote: My thoughts were to use an html_header that tracks how deeply components are nested so that inner components turn off the page wrapper. This achieves 1 and 2. This also achieves 3 if sections raise an exception if their page wrapper is not turned off. You only want to see standard_html_footer and so forth when REQUEST.steps[-1]!=fragment_id, so it would not be accessible directly by URL. Try something like this for standard_html_footer: dtml-if "REQUEST.steps[-1]=='standard_html_footer'" dtml-raise type="NotFound"/dtml-raise/dtml-if /BODY/HTML I think using siteaccess for this is more elegant, though. All the knowledge about what is allowed and what is not is maintained in one place, and the knowledge can be declared flexibly using regular expressions. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] adding local roles to folders within a Product
I have a ZClass-based product. The folder (should I be calling this an Application Object? :-) ) that contains all the product methods and objects that are accessible via the web has some local roles defined on it. I'm making a sort of Wizard to instantiate a new application instance. This happens by copying an empty application folder from within the ZClass product, to a chosen place in the standard part of the ZODB object heirarchy. I want to define the local roles on the "prototype" folder that is inside my Product. However, when I go to Control_Panel/Products/MyProduct/prototype/manage_access, I get the "map permissions to permissions" screen, rather than the "map permissions to roles, and define local roles" screen. Can I define local roles on my prototype folder -- perhaps using an external method, or DTML API calls to do it? Or, is there some reason that local roles don't make sense within products, and so I have to copy my prototype folder to elsewhere in the ZODB, and then set the local roles? -- Steve Alexander Software Enigineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: adding local roles to folders within a Product
Steve Alexander wrote: I want to define the local roles on the "prototype" folder that is inside my Product. However, when I go to Control_Panel/Products/MyProduct/prototype/manage_access, I get the "map permissions to permissions" screen, rather than the "map permissions to roles, and define local roles" screen. Can I define local roles on my prototype folder -- perhaps using an external method, or DTML API calls to do it? Or, is there some reason that local roles don't make sense within products, and so I have to copy my prototype folder to elsewhere in the ZODB, and then set the local roles? Correction: I mean "user-defined roles" rather than local roles. -- Steve Alexander Software Enigineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Returning a list of names from a Python Method
Michael Bernstein wrote: Michael Bernstein wrote: Does anyone on the list know how to change the getUserNames Python method to return a list of names instead of a list of objects? The code in question is this: user_ids=self.UserSource.getPersistentItemIDs() names=[] for i in user_ids: names.append(self.getItem(i)) return names Ok, I solved this little problem (and of course it looks obvious once I've done it): names=[] for i in user_ids: names.append(i) return names You can also use the Python map function for this. It will be more efficient that iterating through user_ids using "for i in user_ids:" return map(None, self.UserSource.getPersistentItemIDs()) -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Using PropertySheets
Erich Seifert wrote: * I can't pass a default value to a tokens property. How to? Can you pass in a space-separated string, such as '' or 'token1' or 'token1 token2'? * I can't pass a default value to a boolean property. How to? How are you trying to do this? You can pass in the string '1' for true and '0' for false. Could someone please give me some example code or hints? It would really help to see some of the code you're already using. Can you also say a bit about what you are trying to do overall? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Can ZPatterns Plugins be used separately?
Kevin Howe wrote: Hi, I'm wondering if it is possible to use ZPattern Plugins in a non-ZPatterns Product? Allowance for Plugins would be a very useful feature in many applications. You can use PlugIns without using the rest of ZPatterns, such as DataSkins and Racks. You still have to have the ZPatterns product installed, obviously. I can see this becoming even more useful when ZClasses work with PlugIns. This may be a while off, though. I'm still in favour of splitting ZPatterns into separate DataSkins and PlugIns packages in the next feature release. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Membership and Local Roles
Michael Bernstein wrote: I posted this to the PTK list on Friday, but didn't get any responses over the weekend, so I'm reposting here. I feel that a barrier to Loginmanager and Membership becoming more generally usable for site builders is it's current lack of support for local roles. Specifically, members do not show up in the local roles screen (manage_listLocalRoles) user list. Through the magic of grep and find, I think I've identified the relevant sections of code in Zope that need to be duplicated in Membership (or maybe in LoginManager). I think you've found out why local roles don't work. Congratulations on a successful code hunting mission :-) I don't know for sure, but I think the API for returning a list of users has been omitted intentionally. A LoginManager instance might "contain" (or rather, provide authentication to) thousands of users. Listing all of these would arguably break the management interface. Perhaps what LoginManager (or Membership) needs is a way of stating, for each user, whether they should appear in the local-roles list. This could be a checkbox for each user, or it could be a method that gets called to specify the users that appear, for example, using a regular expression, or perhaps based on some quality of the user object. You should still be able to use local roles, even now, by using an external method to add local roles where you need them, and explicitly give the user id. You just can't select from the management interface. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns bug: infinite recursion with External Attribute Provider
ZPatterns-0-4-2a2
When I use an External Attribute Provider, I get an infinite recursion
problem, and Zope hangs.
This is because DataManager (in DataManagers.py) uses normal getattr()
and object.__skinSlot__ methods to get and set the special attribute
__skinSlot__ on DataSkins.
Thus, the system tries to store the __skinSlot__ attribute in the
DataSkin instance by storing the __skinSlot__ attribute in the DataSkin
instance by storing the __skinSlot__ attribute in the DataSkin instance
by...
I can fix this, by patching DataManager to use client.__dict__ instead:
def _readableSlotFor(self,client):
#slot = getattr(client,'__skinSlot__',_marker)
slot = client.__dict__.get('__skinSlot__',_marker)
if slot is _marker: return {}
client._setSlot(slot); return slot
def _writeableSlotFor(self,client):
#slot = getattr(client,'__skinSlot__',_marker)
slot = client.__dict__.get('__skinSlot__',_marker)
if slot is _marker:
#slot = client.__skinSlot__ = PersistentMapping()
slot = client.__dict__['__skinSlot__'] = PersistentMapping()
client._setSlot(slot); return slot
This works, in as far as I can do things like add sub-objects to a
ZClass that derives from DataSkin and ObjectManager without infinite
regress. However, I still get an attribute error. This is because the
External Attribute Provider only offers to set and delete its
attributes. I'm confused as to why this should be -- surely the External
Attribute Provider should offer to get the same attributes as it is
offering to set and delete?
Or, do I have to use an extra provider in the form of some SkinScript or
a Generic Attribute Provider to do the getting?
I tried altering namesForRegistration, so that the External Attribute
Provider would offer to getattr for "*", then refreshed the customizer
I'd put the EAP into.
def namesForRegistration(self,container):
"""XXX"""
return {
'provides':('attributes',),
'setattr': self.Attributes, 'delattr': self.Attributes,
'getattr': self.Attributes
}
I can now add sub-objects to my ZClass instances, and I can traverse to
those sub-objects by typing them into the URL field of my browser.
However, I can't get a list of the sub-objects by calling objectIds.
I'm trying to make sense of External Attribute Provider so that I can
write a BTreeAttributeProvider for DataSkinAddons, as discussed on the
zope-dev list at the end of August, subject "BTreeFolder /w Customizer
support".
Any pointers appreciated.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPatterns based CD example. Halfway there! Need help
James Johnson wrote:
I've got the storage entry part down. I can't seem to get the data
out. It seems to me that I would put an Index_html method in the
specialist but I get a aq_base error when trying to put one in. So I
put it in my ZClass dataskin. Here is the code I'm using below.
I tried to access it many ways. All I get is a blank sheet.
I tried using dtml-let myPPS="propertysheets.get('cd_info')"
dtml-var "myPPS.getProperty('artist')'
But it says object does not have getProperty.
Hmm.
Add a SkinScript method to your Specialist, under the Data-PlugIns tab,
with something like this:
WITH self.propertysheets.get('cd_info') COMPUTE
artist=getProperty('artist'),
label=getProperty('label')
You can then write your ZClass index_html and use dtml-var artist or
dtml-artist; where you want the artist, and similarly with label.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] Advice on DTMLDocument
Andy McKay wrote:
Hi there,
Well a while ago I came across a bug that I couldnt cut and paste and
object. A few people helped me out on that, thanks. Ive had a week of
squishing bugs and finally got to this one. The reason why? I was
subclassing DTMLDocument but using my own __init__ (similar to one where I
dont subclass from DTMLDocument), where I didnt fiddle with __name__. The
result was when absolute_url() was called I was getting:
http://fork:8080/code/test/ElementWithAttributes !
In your __init__ method, try putting this line in:
YourClassName.inheritedAttribute('__init__')(self, id)
This is assuming that you have the argument "id" in your __init__ method.
I've no idea whether it will solve your problem, as I haven't tried to
reproduce it.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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[Zope-dev] ZPatterns bug: typo in Transactions.py
ZPatterns, latest released version. def abort_sub(self, transaction): In Transactions.py, aborting a subtransaction will fail because of a method signature mismatch. Was: def abort_sub(self, transaction): self.tpc_abort() Should be: def abort_sub(self, transaction): self.tpc_abort(transaction) I think there's something not quite right about the way ZPatterns is handling subtransactions, even with this patch, and the other one related to Transactions.py that I posted a while back. Is there any detailed documentation about how Zope transactions and subtransactions are supposed to work? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Re: ZPatterns (sub-)transaction problems
"Phillip J. Eby" wrote: I will try to have a ZPatterns snapshot release made this week that will include those fixes (plus the fix for a problem with DynPersist that we also discovered yesterday). Great. I'm looking forward to that. Can we lose DynPersist altogether for this release? Or are there still folks out there using ZPatterns with 2.1.6? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Context Acquisition - Security Hole?
Chris Withers wrote:
Shane Hathaway wrote:
How should I got about petitioning
for
dtml-var anobject aq_context to become valid syntax?
There's one little (okay, big) problem with this idea: aq_context
strips the security context. In fact, it could be used to confuse the
security machinery.
Let's say I'm Joe Hacker and I have set up membership at
www.zope.org/Members/jhacker. I create a DTML method called index_html
with this:
dtml-with Members
dtml-with hathawsh aq_context
dtml-call expr="index_html.manage_edit('1 0WN U')"
/dtml-with
/dtml-with
Alright, I give up :-(
This would be really useful, but if it's going to open up security holes
everywhere, then I best leave it alone :-S
You could still have an aq_context attribute that would stay secure. It
would just be very inefficient. The security checks still follow
standard acquisition, but the object that is returned from an
acquisition search is chosen context first.
Without further optimisation, this means a containment security check
for each element of the context. Which kind of suggests worse than
linear performance as the context path grows.
--
Steve Alexander
Software Engineer
Cat-Box limited
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[Zope-dev] Re: ZPatterns: Error: User error! :-/
Steve Alexander wrote: I have a customizer folder with various data-plugins and customizers. snipped File lib/python/Products/ZPatterns/Providers.py, line 178, in namesForRegistration (Object: PlugInBase) TypeError: (see above) I'll start to look into this. Any advice would be most welcome. Found the problem... I did have different versions of ZPatterns on both machines after all. ZPatterns-0-4-1snap1 ZPatterns-0-4-2a1 Sorry... user error :-) -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns: Error reimporting .zexp containing Folder w/ CustomizerSupportSupport
I have a customizer folder with various data-plugins and customizers. I just exported it from one zope installation, for importing into one on a different server. The installations are more or less identical -- same zope version, same products. When I try to reimport it, I get the following error: Error Type: TypeError Error Value: No data plug-ins available to link to in /emb Traceback (innermost last): File lib/python/ZPublisher/Publish.py, line 222, in publish_module File lib/python/ZPublisher/Publish.py, line 187, in publish File python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ApplicationDefaultPermissions) File lib/python/ZPublisher/Publish.py, line 171, in publish File lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_importObject) File lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_importObject) File lib/python/OFS/ObjectManager.py, line 535, in manage_importObject (Object: ApplicationDefaultPermissions) File lib/python/OFS/ObjectManager.py, line 290, in _setObject (Object: ApplicationDefaultPermissions) File lib/python/Products/ZPatterns/PlugIns.py, line 211, in manage_afterAdd (Object: PlugInBase) File lib/python/OFS/ObjectManager.py, line 298, in manage_afterAdd (Object: PlugInBase) File lib/python/Products/ZPatterns/PlugIns.py, line 211, in manage_afterAdd (Object: Transactional) File lib/python/OFS/ObjectManager.py, line 298, in manage_afterAdd (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 64, in manage_afterAdd (Object: PlugInBase) File lib/python/Products/ZPatterns/PlugIns.py, line 120, in _addPlugIn (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 168, in manage_refreshPlugIns (Object: Transactional) File lib/python/Products/ZPatterns/PlugIns.py, line 332, in manage_refreshPlugIns File lib/python/Products/ZPatterns/Providers.py, line 101, in _PlugInsChanged File lib/python/Products/ZPatterns/Providers.py, line 178, in namesForRegistration (Object: PlugInBase) TypeError: (see above) I'll start to look into this. Any advice would be most welcome. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] PATH_TRANSLATED delimted with backslash ?
Evan Simpson wrote: From: "Steve Alexander" [EMAIL PROTECTED] obj = self.restrictedTraverse(REQUEST.PATH_TRANSLATED) This stopped working when I tried the software on Windows. Bug or feature? I'm not sure, but I'm *very* curious what you're trying to accomplish with this code. A better equivalent would probably be obj = self.getPhysicalRoot().restrictedTraverse(REQUEST.steps). I'm producing a set of breadcrumb-style links. I want to test whether the object at the requested URL has the attribute "breadcrumbs_text", because if so, that text should be used instead of the results of my breadcrumbs algorithm. I have an object that is a DTML Document. It has the property "breadcrumbs_text" set. My breadcrumbs external method is called from standard_html_header. When I look at the DTML Document through the web, the "self" object passed to the breadcrumbs external method is the folder that contains the DTML Document. (I thought that should only be the case for DTML Methods!) So, in order to check the existence of the attribute "breadcrumbs_text", I needed to get hold of the object that was requested. I'm not using virtual hosting for this project (although I will be later), so I threw REQUEST.PATH_TRANSLATED in there as I could see from inspecting REQUEST that it would give me what I needed. It looks like using REQUEST.steps is better because it will continue to work with virtual hosting. I'll change the method to use REQUEST.steps. Thanks. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] SkinScript, and family
Bill Anderson wrote: Steve Spicklemire wrote: Hi Bill, I doubt that skinscript is going to help with 'potentially complicated calculations'. After looking, I don't think it wil either. I am building statistics of of a call Tracking System. For example, each ticket has a response time property, and one of the graphs needs average response time. Looks like PythonMehtods is the winner Well, I'd start by using a CatalogingTrigger that responds to events related to your Tickets, and records the ticket_id, ticket_date and response_time in a ResopnseTimes ZCatalog. Then, I'd use ZCatalog queries to get average response times for various periods of time. I can't see a use for SkinScript in there, though :-) ps. I am working on a skin script howto. Expect to see something after I return from a conference on Monday. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] PATH_TRANSLATED delimted with backslash ?
I just tried out on Windows 98 a Zope application that was developed on Linux. Everything worked fine, except that REQUEST.PATH_TRANSLATED changed to be delimited by backslashes on Windows 98, whereas it is delimited by slashes on Linux. This caught me out, as I'd been using it raw in an external method: obj = self.restrictedTraverse(REQUEST.PATH_TRANSLATED) This stopped working when I tried the software on Windows. Bug or feature? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns: transaction bug
While updating a load of DataSkins all together using a ZCatalog, I got this error: 2000-09-03T08:03:13 PANIC(300) ZODB A storage error occurred in the last phase of a two-phase commit. This shouldn't happen. The application may be in a hosed state, so transactions will not be allowed to commit until the site/storage is reset by a restart. Traceback (innermost last): File lib/python/ZODB/Transaction.py, line 296, in commit File lib/python/Products/ZPatterns/Transactions.py, line 108, in tpc_finish File lib/python/Products/ZPatterns/Transactions.py, line 137, in end_tran File lib/python/Products/ZPatterns/Transactions.py, line 48, in _unregister (Object: ProviderContainer) KeyError: _v_registered The line from Transactions.py in question is: def _unregister(self): del self._v_registered From a little bit of instrumentation, I see that one of my Customizer instances is getting unregistered twice in a row. An obvious naive fix is to put the del line in a try-except block, or to change it to if self._v_registered: del self._v_registered From a lot of instrumenting code, tinkering and reading up on the ZODB transaction system, I think I've found what the problem is. The error happens when the ZCatalog attempts to commit a subtransaction. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns: transaction bug
**Darn**; I pressed the send button on my mail client by accident while still working on this one. Ignore the last message. I think the error is to do with the way that ZPatterns.Transactions.Reporter doesn't do anything special for subtransactions. On committing a subtransaction, it commits the top-level transaction that it knows about. Then again, I'm new to the way ZODB handles transactions, so I might well be wrong here. More later... -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZPatterns transactions bug
Here's a trace of all the transaction calls to do with a particular customizer. I have instrumented ZPatterns.Transactions.Transactional like this: def _register(self): if self.id=='customize_items': print "\n -- REGISTER %s" % self._v_registered if self._v_registered: return get_transaction().register(Reporter(self)) self._v_registered = 1 def _unregister(self): try: del self._v_registered if self.id=='customize_items': print "\n_unregister: NORMAL OPERATION" # import traceback # traceback.print_stack() except: print "\n\n_unregister: ERROR" # import traceback # traceback.print_stack() ZPatterns.Transactions.Reporter in most of the methods. Specifically: def tpc_begin(self, transaction, subtransaction=None): if self.client.id=='customize_items': print '\n -- TPC begin %s sub=%s' % (self, subtransaction) self.tpc_entered = 1 Also: ZCatalog.py def catalog_object(self, obj, uid): """ wrapper around catalog """ self._v_total = (self._v_total + self._catalog.catalogObject(obj, uid, self.threshold)) if self.threshold is not None: if self._v_total self.threshold: print ' -- ZCatalog commit subtransaction start' # commit a subtransaction get_transaction().commit(1) # kick the chache, this may be overkill but ya never know self._p_jar.cacheFullSweep(1) self._v_total = 0 print ' -- ZCatalog commit subtransaction complete' The trace starts when I try to update a ZCatalog containing lots of DataSkin-derived instances. -- REGISTER 0 ... lots of REGISTER 1 -- REGISTER 1 -- ZCatalog commit subtransaction start -- TPC begin Products.ZPatterns.Transactions.Reporter instance at 89600f8 sub=1 -- TPC commit Products.ZPatterns.Transactions.Reporter instance at 89600f8 -- TPC finish Products.ZPatterns.Transactions.Reporter instance at 89600f8 -- TPC end tran Products.ZPatterns.Transactions.Reporter instance at 89600f8 _unregister: NORMAL OPERATION -- ZCatalog commit subtransaction complete -- REGISTER None -- REGISTER 1 -- TPC begin Products.ZPatterns.Transactions.Reporter instance at 89f98b8 sub=1 -- TPC commit Products.ZPatterns.Transactions.Reporter instance at 89f98b8 -- TPC finish Products.ZPatterns.Transactions.Reporter instance at 89f98b8 -- TPC end tran Products.ZPatterns.Transactions.Reporter instance at 89f98b8 _unregister: NORMAL OPERATION -- TPC commit_sub Products.ZPatterns.Transactions.Reporter instance at 89600f8 -- TPC begin Products.ZPatterns.Transactions.Reporter instance at 89600f8 sub=None -- TPC commit_sub Products.ZPatterns.Transactions.Reporter instance at 89f98b8 -- TPC begin Products.ZPatterns.Transactions.Reporter instance at 89f98b8 sub=None _unregister: ERROR, can't del self._v_registered I don't know enough about ZODB transactions, and the intent of ZPatterns.Transactions to do anything more at present. I did note in ZODB/Transaction.py this comment. Perhaps it is relevant? # - For every jar for which we've called tpc_begin on, # we either call tpc_abort or tpc_finish. It is OK # to call these multiple times, as the storage is # required to ignore these calls if tpc_begin has not # been called. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZPattens Question? Guestbook example
Hi James,
Please don't post to the list in HTML.
James Johnson wrote:
Hello,
I'm trying to get the basic app building concept down with
ZPatterns.
Forgive me if I'm way off the mark. I'm building off the guest
book
example from the new Zope book. What I've done is created a
product
folder call Gbook. Inside I've created a dtml method index_html, a
specialist named Guestbook and a Dataskin instance called
Guestbook_entry. I have one property sheet named GBookProps defined
for dataskin ZClass. Instead of storing the guestbook entries in
documents I'm trying to store them using the dataskin database.
In the Specialist(Guestbook) I have 3 methods addEntry,
addEntryAction, and addEntryForm
When I call addEntry I get.
TypeError
sequence-index must be an integer
I thought I was so close to understanding me not understanding. :)
It seems to me that the "only" way to produce a ZPatterns based
product is to do it from python.
How about this, should I be trying to add entries this way?
"""dtml method addEntry"""
dtml-var standard_html_header
center
h2 Inserting new Guest Book Table Info Item!/h2
dtml-let id="'entry_%d' % len(self.objectIds())"
ni="newItem(Guestbook)"
/dtml-let
This is a bit odd -- you're closing your dtml-let tag immediately after
opening it.
Also, I don't understand your call to newItem. You should be passing an
id into it.
dtml-call "ni.propertysheets.manage_addPropertySheet
(id='GBookProps', ns=''
You probably ought to close the bracket, quote and tag here.
dtml-let nips="ni.propertysheets.get('GBookProps')"
The variable "ni" won't be bound to anything in particular here.
dtml-call "nips.manage_addProperty('guest_name', guest_name,
'string')"
dtml-call "nips.manage_changeProperties(REQUEST)"
/dtml-let
form action=index_html
input type=submit value="OK"
/form
/center
You can use ZPatterns from DTML alone quite easily. However, some things
are easier from an external method or a python method.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPattens Question? Guestbook example
James Johnson wrote:
I wonder if you are planning on releasing some UML stuff related to
ZPatterns and Zope?
I don't think UML is a very good match for describing either the
internals of ZPatterns, or for describing systems built using ZPatterns
-- or Zope for that matter.
I use a Freeware product called DOME. It has
support for UML and COAD-YOURDON OOA.
For Zope and ZPatterns work, I prefer the Coad notation to UML. It is
more Object-oriented, whereas UML is more class-oriented.
I tend to use a whiteboard and digital camera for modeling work. Either
that, or pens and paper.
I'm don't have any formal
training so I'm still trying to figure out what it all means.
Keep on figuring. I think you're doing ok :-)
If you have any example diagrams that you can share that would be
most kind.
What would you most like a diagram of? I find diagrams generally most
useful when they come along with a description in words.
Here is the code I was trying to use in the first place.
h2 Inserting new Guest Book Table Info Item!/h2
dtml-let id="'entry_%d' % len(self.objectIds())"
I can see what you're trying to do here. You can't do it like this
though.
You can't use "len" or "self" in dtml. The variable "self" is kind of
taken as read in most cases. Use "_.len()" for "len()". So, you could
use
dtml-let id="'entry_%d' % _.len(objectIds())"
However, although this will return a value, it still won't do what you
want. The items that you store in a specialist actually live in a Rack.
They are not visible as normal sub-objects that you can access using
self.objectIds().
The number returned by len(self.objectIds()) represents the number of
DTML methods, DTML documents, folders, External methods, Python methods,
images, files and so forth, plus the number of Racks and Data-PlugIns in
the specialist.
Rather that try to give you new item a unique sequential id, try just
giving it a unique id.
You can use a method in a Rack called "newKey" for this. Then, this
method will be called to determine the new id, you pass _.None (from
DTML) or None (from a Python method or an External method).
I use this external method to generate a new unique key for my racks. I
put this inside the Rack, from the rack's methods tab.
from DateTime import DateTime
def newKey(self):
# self is a rack instance
fk = lambda x: 'entry-%d' % x
n = int(DateTime().timeTime())
max_tries = 10
key = fk(n)
while max_tries and self.getItem(key) is not None:
n = n + 1
max_tries = max_tries-1
key = fk(n)
return key
ni="Guestbook.newItem(id)"
dtml-call "ni.propertysheets.manage_addPropertySheet
(id='GBookProps', ns='')"
You'll want a dtml-let here I should think.
nips="ni.propertysheets.get('GBookProps')"
dtml-call "nips.manage_addProperty('guest_name', guest_name,
'string')"
dtml-call "nips.manage_changeProperties(REQUEST)"
And, of course, another dtml-let closing tag here.
/dtml-let
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] Converters.field2date, allow empty string to return None?
Brad Clements wrote: One thing that has been bothering me is that I can't easily test my ZSQL Methods if they accept a date type unless I completely fill all the date arg types. For example, if the sqlmethod has argument type startdate:date='' and in the body I have dtml-if startdate ... When i use the test form, I can't leave the date field empty, otherwise I get a conversion error from Converters.field2date() I also have this problem with any form that has type date, if the end-user doesn't put a date in the form, I get a conversion error. Its okay with me to receive an empty string, which gets converted to None .. I just put NULL in the sql database. So .. what's the correct fix to allow empty fields to return either '' or None from field2date? I take the form input as a string, and use an intermediate method that checks whether it makes a valid date, and massages it into shape if not. For an empty form field, what is best to do depends on the application. When I'm using PropertySheets, for example, I often use a boolean property called "date_is_known". If the date is left blank, I set the date to 3000-01-01 UTC, and date_is_known to 0. Otherwise, the date gets set appropriately, and date_is_known is set to 1. I set the date so far in advance so that if it inadvertantly creeps into some analysis (because someone forgot to check date_is_known) it will be obvious that something is up. Of course, this does mean that my systems have a year-3000 problem. Perhaps I should use 3 instead? g You can redirect to the form, or an error page, or the form with an error variable set, if the date is not parsable, or not valid for your application. As you're using a SQL database that supports NULL values in date fields, you can obviiously process the results to mean the same thing. Oh, if you're just asking people for a date, rather than a date and time, I'd suggest appending a standard timezone to the date before you store it. Otherwise, you may have problems with days slipping around if your server changes timezone or you enter daylight savings time. This is more of an issue near to the GMT zone. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Compatibility issues: ZPatterns 0.4.2
Steve Alexander wrote: Phillip J. Eby wrote: Now, I can provide *unfiltered* linkage by direct delegation, but this would mean dropping the ability to selectively take only certain attributes or sheets from the parent. But I suppose that, compared to dropping the capability to acquire altogether, this might be preferable. This sounds fine for my use of Triggers that apply across everything that a Specialist manages. I've got ZPatterns 0.4.2a1 now. I see that Folders w/ customizer support now have their own Data-plug-ins tab (they didn't before), and that it does direct delegation, rather than filtered forwarding. Does this mean that your suggestion above has become a design decision for ZPatterns? Data plug-ins directly in Customizers and Specialists aren't due to be deprecated? I'm guessing that this is the case. Also, it is a bit of a pain to refresh each of the DataManager instances on each upgrade. How about an external method in ZPatterns to walk the object tree and update instances as required? Perhaps it could use ZopeFind. Or, seeing as Specialists and Customizer folders contain other DataManagers, could you add a button to a tab in Specialists and Customizer folders that refreshes them, and recursively all the DataManagers they contain? Then I'd just have to go to each top-level datamanager and refresh them when I upgrade. Oh also, FYI, we're using ZPatterns for a couple of medium sized projects, one of which is functionally complete. SkinScript has proved extremely useful. I've been able to evolve an application in a very clean way using propertysheets and SkinScript, whereas before I'd have had to retrofit a custom base class. Phillip and Ty, thanks for your sharing your work and sharing your ideas. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Compatibility issues: ZPatterns 0.4.2
"Phillip J. Eby" wrote: I see that Folders w/ customizer support now have their own Data-plug-ins tab (they didn't before), and that it does direct delegation, rather than filtered forwarding. Direct delegation? I've lost you here. If it's doing that, then something's broken. sorry -- I didn't really mean that. Check and see if you have any "Link to Parent Data Plug-ins" in your customizers (they're added by default now on new customizers). You can filter the parent providers by selecting the ones you want to leave out on the "exclude" property. That's what I meant. Great. Does this mean that your suggestion above has become a design decision for ZPatterns? Data plug-ins directly in Customizers and Specialists aren't due to be deprecated? I'm guessing that this is the case. Argh. I knew there was something (else) I was forgetting to document in the CHANGES file. I had better go fix that now. I'll take that as a "yes" then. :-) Also, it is a bit of a pain to refresh each of the DataManager instances on each upgrade. How about an external method in ZPatterns to walk the object tree and update instances as required? Perhaps it could use ZopeFind. Or, seeing as Specialists and Customizer folders contain other DataManagers, could you add a button to a tab in Specialists and Customizer folders that refreshes them, and recursively all the DataManagers they contain? Then I'd just have to go to each top-level datamanager and refresh them when I upgrade. It isn't actually be necessary to refresh on every upgrade. IIRC, that note about refreshing is in reference to pre-0.4.x versions. I guess I need to fix that too... I had a bit of oddness with a Folder with Customizer Support on upgrading from 0-4-1snap1 to 0-4-2a1. Until I added then removed a datamanager, there was some attribute error occuring. Unfortunately, I didn't look into it before I accidentally fixed it. I'll be upgrading another zope instance with ZPatterns later on, so I'll watch out for the same behaviour then. do you think you could perhaps be persuaded to write a short reference and/or tutorial for us to include (perhaps as a help screen from the SkinScript method object's management screens)? Thanks. I have a DataSkins how-to / short introduction that is about half complete. I was hoping to get this out by today, but then I discovered SkinScript, and also real work got in the way :-) I'll try and get it finished this weekend. Perhaps some of that can be reused as help in the management screens. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] ZCatalog: text searches fail with sort_on + patch
I'm getting an error in Catalog when I specify sort_on on a field-index, and also search on a text index. Zope 2.2.1, Python 1.5.2 Error Type: TypeError Error Value: loop over non-sequence Traceback (innermost last): File lib/python/ZPublisher/Publish.py, line 222, in publish_module File lib/python/ZPublisher/Publish.py, line 187, in publish File lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: ProviderContainer) File lib/python/ZPublisher/Publish.py, line 171, in publish File lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: search) File lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: search) File lib/python/OFS/DTMLDocument.py, line 177, in __call__ (Object: search) File lib/python/DocumentTemplate/DT_String.py, line 528, in __call__ (Object: search) File lib/python/DocumentTemplate/DT_In.py, line 630, in renderwob (Object: SiteIndex) File lib/python/Products/ZCatalog/ZCatalog.py, line 463, in searchResults (Object: Traversable) File lib/python/Products/ZCatalog/Catalog.py, line 602, in searchResults File lib/python/Products/ZCatalog/Catalog.py, line 555, in _indexedSearch TypeError: (see above) This seems to be a simple type incompatibility error. Attached is a patch that fixes this. In Collector, http://classic.zope.org:8080/Collector/1586/view -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net *** Catalog.py.orig --- Catalog.py *** *** 552,558 if intset: append((k,LazyMap(self.__getitem__, intset))) else: ! for r in rs: append((sort_index._unindex[r], LazyMap(self.__getitem__,[r]))) --- 552,558 if intset: append((k,LazyMap(self.__getitem__, intset))) else: ! for r,x in rs.items(): append((sort_index._unindex[r], LazyMap(self.__getitem__,[r])))
[Zope-dev] ZPatterns bug: Customizers don't rename well
ZPatterns 0-4-1snap1 Zope 2.2.1 To reproduce the error, do this: Create a Folder with Customizer support Give it a Customizer Rename that Customizer Press the "Customizers" tab in the folder Zope Error Error Type: AttributeError Error Value: __customizerRegistry__ Traceback (innermost last): File /lib/python/ZPublisher/Publish.py, line 222, in publish_module File /lib/python/ZPublisher/Publish.py, line 187, in publish File /lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook File /lib/python/ZPublisher/Publish.py, line 171, in publish File /lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_main) File /lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_main) File /lib/python/App/special_dtml.py, line 120, in __call__ (Object: manage_main) (Info: /lib/python/Products/ZPatterns/www/PlugInGroup.dtml) File /lib/python/DocumentTemplate/DT_String.py, line 528, in __call__ (Object: manage_main) File /lib/python/App/special_dtml.py, line 120, in __call__ (Object: manage_below) (Info: /lib/python/Products/ZPatterns/www/showCustomizers.dtml) File /lib/python/DocumentTemplate/DT_String.py, line 528, in __call__ (Object: manage_below) File /lib/python/DocumentTemplate/DT_In.py, line 630, in renderwob (Object: manage_registry) File /lib/python/Products/ZPatterns/Customizers.py, line 63, in manage_registry AttributeError: (see above) The error occurs because the rename method redirects to: http://puffin.cat-box.net:7080/test/Customizers_ Pressing the "customizers" tab yields the url: http://puffin.cat-box.net:7080/test/Customizers_/Customizers_/manage_workspace -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] inheritedAttribute
In the latest Zope source, I've noticed calls to inheritedAttribute in the Python code. I've found the C source code in ExtensionClass.c, but it doesn't help me understand when I should use it from Python, and why. *reads more source* Ah! About 70 lines further on in ExtensionClass.c: "inheritedAttribute(class,name) -- Get an inherited attribute\n\n" "Get an attribute that would be inherited if the given (extension)\n" "class did not define it. This method is used when overriding\n" "inherited methods. It provides 2 advantages over accessing\n" "\n" "attributes directly through a superclass:\n" "\n" "1. The superclass need not be known,\n" "\n" "2. The superclass may be a Python class. Without this method, it would\n" " be possible to override methods inherited from python classes because\n" " unbound methods gotten from Python classes cannot be called with \n" " extension class instances. \n" Is there some documentation of this on zope.org or dev.zope.org that I've missed? Thanks. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] New version of BTreeFolder. Just a Newbie Question
Bill Anderson wrote: Any chance at a BTree Folder w/customizer suppor tin the near future? :) I did some work towards this. However, I didn't continue. I realised that I could get the same effect by having a BTreeFolder inside a Customizer Folder. The only downside is a slightly longer URL for objects in the BTreeFolder. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] ZPatterns bug with patch
"Phillip J. Eby" wrote:
At 10:22 AM 8/27/00 +0100, Steve Alexander wrote:
I've fixed this by adding a test to the start of __set_attr__ of
DataSkins.py:
def __set_attr__(self,name,val,_v_dm_=_v_dm_):
+ if name=='id' and val==self.__dict__['id']:
+ return
dm = self.__dict__[_v_dm_]
This looks reasonable, and backward-compatible, since __init__ guarantees
the dict will have an id. I'm not thrilled with adding more overhead to
attribute setting, however, so I'll probably do it like this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id' and val==self.__dict__['id']: return
raise
Hopefully this should only perform the extra computations when the first
part fails...
Are Python classes derived from DataSkin supposed to call
DataSkin.__init__ ?
Anyway, perhaps this would be a small improvement:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if (name=='id' and self.__dict__.has_key('id')
and val==self.__dict__['id']): return
raise
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPatterns bug with patch
"Phillip J. Eby" wrote:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id' and val==self.__dict__['id']: return
raise
Hopefully this should only perform the extra computations when the first
part fails...
Are Python classes derived from DataSkin supposed to call
DataSkin.__init__ ?
Anyway, perhaps this would be a small improvement:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if (name=='id' and self.__dict__.has_key('id')
and val==self.__dict__['id']): return
raise
What rubbish! I didn't mean that at all!
I think what I meant was this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id':
if self.__dict__.has_key('id') and val==self.__dict__.['id']:
return
else:
self.__dict__['id']=val
return
raise
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] ZPatterns bug with patch
Steve Alexander wrote:
What rubbish! I didn't mean that at all!
I think what I meant was this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id':
if self.__dict__.has_key('id') and val==self.__dict__.['id']:
return
else:
self.__dict__['id']=val
return
raise
I think what I *really* meant was this:
try:
dm = self.__dict__[_v_dm_]
except KeyError:
if name=='id':
if self.__dict__.has_key('id') and val==self.__dict__['id']:
return
else:
self.__dict__['id']=val
self._p_changed = 1
return
raise
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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[Zope-dev] ZPatterns transaction bug
I have a trigger that is a datamanager-plugin for a Customizer folder. The trigger listens to ADD events. If the trigger rasies an exception as it is notified that a new DataSkin object is being added beneath the customizer folder, I get a ZODB error: 2000-08-27T09:25:38 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000*\336' Traceback (innermost last): File /usr/local/zope/SiteBox/lib/python/ZODB/Connection.py, line 442, in setstate File /usr/local/zope/SiteBox/lib/python/ZODB/FileStorage.py, line 587, in load (Object: /usr/local/zope/SiteBox/var/Data.fs) File /usr/local/zope/SiteBox/lib/python/ZODB/FileStorage.py, line 563, in _load (Object: /usr/local/zope/SiteBox/var/Data.fs) KeyError: *Þ Sometimes I get slightly different errors, where Zope refuses to commit any more transactions. Zope 2.2.1, ZPatterns 0-4-1snap1 with the DataSkins patch I posted a few minutes ago. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Bug in error logging in Catalog
Zope 2.2.1, lib/python/Products/ZCatalog/Catalog.py
When there is an error uncataloging an object, uncatalogObject()
attempts to log the fact with this line:
LOG('Catalog', ERROR, ('uncatalogObject unsuccessfully '
'attempted to uncatalog an object '
'with a uid of %s. ' % uid))
However, if uncatalogObject has been passed a tuple, the error logging
will fail with "TypeError Error Value: not all arguments converted".
The fix is to change the line to:
LOG('Catalog', ERROR, ('uncatalogObject unsuccessfully '
'attempted to uncatalog an object '
'with a uid of %s. ' % `uid`))
or, to fit with the rest of the calls to LOG in Catalog.py:
LOG('Catalog', ERROR, ('uncatalogObject unsuccessfully '
'attempted to uncatalog an object '
'with a uid of %s. ' % str(uid)))
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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Re: [Zope-dev] bug in CatalogAwareness?
Shane Hathaway wrote: I was suspicious of the entire method so I wrote a replacement which is based on a new interface available in Zope. I *think* it's correct, but it's a drastic change so it's only in the new PTK and nowhere else. (This is slightly modified from PTK CVS.) def __url(self): return string.join(self.getPhysicalPath(), '/') The implementation of url() in CatalogAwareness.py in Zope 2.2.1 seems to ensure that there is a '/' at the start of the url that is given to the ZCatalog. I don't know how important that really is, though. Perhaps your method should be changed to this: def __url(self): return '/'+string.join(self.getPhysicalPath(), '/') -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] New method for ZCatalog: recatalog_object
ZCatalog would be easier to use if it had a recatalog_object method: def recatalog_object(self, obj, uid): """Adds object to the catalog if not already present. Removes old entry first, if already in present.""" self.uncatalog_object(uid) self.catalog_object(obj, uid) This, and a new method in Traverable.py would make cataloging in ZPatterns SkinScript very easy indeed. Add to Traversable.py: getPathAsString__roles__=None # Public def getPathAsString(self): '''Returns the physical path as a string. The returned string will always start with a slash.''' return join(self.getPhysicalPath(), '/') Otherwise, ZCatalog could be altered to accept lists of strings as uid method attributes, and automatically convert them into slash-separated strings. Example SkinScript: WHEN OBJECT ADDED, CHANGED CALL Catalog.recatalog_object(self, self.getPathAsString()) WHEN OBJECT DELETED CALL Catalog.uncatalog_object(self.getPathAsString()) Any comments? -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
