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Callable baseclass for ZClasses
by Stefan H. Holek 22 Nov '00

22 Nov '00

Taking ideas from the Renderable product, the ZCallable baseclass (PTK) and the __call__ thread on this very list, I created a Callable baseclass intended as a mixin for ZClasses. class Callable: def render( self, client=None, REQUEST={}, RESPONSE=None, **kw ): '''Calls index_html, if it exists, to render this object. ''' self.isDocTemp = 1 # pass me the namespace, please local = getattr( self, 'aq_base', self ) if hasattr( local, 'index_html' ): method = self.index_html args = (self, REQUEST, RESPONSE) # substitute self for client return apply( method, args, kw ) else: raise AttributeError, 'index_html' __call__ = render I went on to make a ZClass derived from Folder and Callable to effectively create a CallableFolder. Man, was I proud ;). This worked fine for me until I had to put some security on my CallableFolders. Removing 'View' for Anonymous keeps me from accessing a CallableFolder directly but it can still be used as a subtemplate (dtml-var x) from another DTML Document or Method. Bummer! Doing some tests I discovered that plain DTML Documents show the same behaviour (!), though DTML Methods throw 'Unauthorized' as expected. Now I am confused and herewith ask the pros to kindly have a look at what I did. *) Does my baseclass do what I expect it to at all? (or only by chance ;) *) Is there a known issue with DTML Documents used as subtemplates or is their behaviour correct? *) Do I have to take measures in my baseclass to properly access/pass security contexts? *) If yes, how would I do it? *) Or is there even prior art on such a baseclass or reasons why this just cannot possibly work? If you are interested, you can get the CallableFolder product in its current state from ftp://epy.co.at/pub/zope/ I am running Zope 2.2.2 with both Hotfixes and the __call__ fix. Thanks, Stefan -- Things work better when plugged in

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ZPatterns and ZCLasses
by Joachim Schmitz 22 Nov '00

22 Nov '00

I have an existing ZClass/Data Structure like this RecruitingPlatform Company Recruiting Candidates Student Profiles Address Highschool IT Jobprefs ... I want to store the data in the ZClass instances, must each ZClass have the Base class _ZClass_for_DataSkin and do I need a Rack for each class ? Mit freundlichen Grüßen Joachim Schmitz AixtraWare, Ing. Büro für Internetanwendungen Hüsgenstr. 33a, D-52457 Aldenhoven Telefon: +49-2464-8851, FAX: +49-2464-905163

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RE: [Zope-dev] ZPatterns Project Help!
by bentzion＠bellatlantic.net 22 Nov '00

22 Nov '00

Thanks for answering Steve. Unfortunitly I am working with version 0.3 of ZPatterns so I have to use GAP. When I try to translate your Skinscript into GAP like this "attrsexprs:account_object=(RESULT is _.None) and NOT_FOUND or RESULT" and I try to access the object's id with <dtml-var "account_object.id"> I get a "NameError" on account_object. Alternativly if I do <dtml-var account_object> I get a "KeyError". (BTW. for testing I used "accounts.getItem('1434')" which is a valid object. If I do "account_object=RESULT.id" it works fine.) I appreciate any help on this. -Ben >>>>>> Hi Ben, GAPs are sort of deprecated at this point in favor of SkinScript. In SkinScript you might do something like this: WITH accounts.getItem(self.account_id) COMPUTE account_object=RESULT or more carefully... WITH accounts.getItem(self.account_id) COMPUTE account_object=(RESULT is _.None) and NOT_FOUND or RESULT -steve >>>>> "bentzion" == bentzion <bentzion(a)bellatlantic.net> writes: bentzion> Another question... bentzion> I want to have a GAP that will add some other Object to bentzion> an attribute of my DataSkin. This is what I have tried

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ZPatterns: Methods of specialits
by Roch'e Compaan 22 Nov '00

22 Nov '00

I have a specialist Contacts and for Contacts I have a method getAllContactsForCustomer. Whenever I want to call this method I have to pass on the whole namespace and the object itself to get it to work eg: getAllContactsForCustomer(this(), _, _.None). Why is this the case? And what does _.None actually mean? Roché

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making a deepcopy of an ExtensionClass instance?
by Toby Sargeant 22 Nov '00

22 Nov '00

The only way I've found to do this thus far is to add the following method to classes which I want to have deepcopyable instances: def __deepcopy__(self,memo): self=getattr(self,'aq_base',self) new=cPickle.loads(cPickle.dumps(self)) new.__dict__=copy.deepcopy(self.__dict__,memo) return new using cPickle like that seems really slow and ugly, and requiring that every class that might be deepcopied at the very least inherits from a mixin is less than optimal. Does anyone have a better solution? Thanks, Toby. -- [ Toby Sargeant : Inpharmatica : Developer : t.sargeant(a)inpharmatica.co.uk ] [ http://www.inpharmatica.co.uk : 020 7631 4644 fax 020 7631 4844 ]

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ZPatterns Project Help!
by bentzion＠bellatlantic.net 22 Nov '00

22 Nov '00

Another question... I want to have a GAP that will add some other Object to an attribute of my DataSkin. This is what I have tried with no success. fromexpr: accounts.getItem(self.account_id) attrsexprs: account_object=RESULT This way in my UI Methods in my DataSkin I can access (and change) the attributes of "account_object". Q. How can I do this? Should I be doing this in a different/better way? Thanks, -Ben

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Last Call: Comments on Official Docs Process
by Amos Latteier 22 Nov '00

22 Nov '00

We're getting close to finalizing the procedures for the development and maintenance of official Zope documentation. Have your say now, before we come to closure: http://dev.zope.org/Wikis/DevSite/Projects/DocumentationProcess The plan is to fine tune a little more and then weave the documentation processes into the fishbowl process. Thanks for your input! -Amos -- Amos Latteier mailto:amos@digicool.com Digital Creations http://www.digicool.com

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Re: [Zope-dev] What can you do with FSDump?
by Tres Seaver 21 Nov '00

21 Nov '00

"jimbo" <jimbo(a)tacomaplace.com> wrote: > I installed FSDump and created a file system dump. Then do I > follow the normal rules of Python product development? What > are some of the various ways I can use it? At the moment, FSDump is a "one way" tool -- it dumps through- the-web objects to filesystem analogues. Its main use for the moment is to allow various file-based tools (CVS, diff, grep, etc.) to operate on the content. See the diff I created this morning for the DemoPortal product from the PTK: http://www.zope.org/Products/PTK/DemoProduct_0.9.0_0.9.2.diff/index_html Later, I plan to work on the "recreate from dumped files" bit, but I want to do more work on the dumping first. For the moment, the only "two way" scheme I can think of involves grabbing the "*.dtml" and "*.py" files from the output and using them as the raw materials for a replacement filesystem-based product. Tres. -- =============================================================== Tres Seaver tseaver(a)digicool.com Digital Creations "Zope Dealers" http://www.zope.org

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Search Interface, maybe a Replace Interface
by Chris Withers 21 Nov '00

21 Nov '00

I've read the Search and Replace thread on zope(a)zope.org with interest and it's stirred up a few things that interest me. 1. Is there a 'Search Interface' in Zope? I know we have the Catalog, which provides _a_ search interface, but it has some problems... Wouldn't it be great if there was a neutral Zope Search Interface which specified how you would index, un-index, re-index objects and how you would search the resulting indexes? That way, you could use ZCatalog, should you wish, but likewise someone could implement that interface usign MySQL's new full text searching stuff, or perhaps the Verity search engine, or whatever else anyone wants to implement. I guess PJE might fire in with the suggestion of a LoginManager-like implementation so people could search and index things in a mroe flexible way, which would also be a great idea... 2. I agree completely with Jon Farr about the replaceable side of things. Any object which supports 'content replacement', which is what we're talking about here, should implement the replaceable interface. Dunno what this would look like though, I guess the Replaceable interface would need to extend the Catalog interface... ...hmmm, that raises an interesting other point, one which has been mentioned before, that of nested catalogs. Okay, I'm not going to explain this very well, and I'm sure it has huge problems, but... ...what if all content objects implemented a SearchAndReplace interface, and in addition propogated SearchAndReplace requested to any objects they contain? Hmmm... Quite enough waffling from me, what do people think? cheers, Chris

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FSDump + 'diff -r' -> Wow!
by Tres Seaver 21 Nov '00

21 Nov '00

I was just able to scratch a *really* big itch: I used my FSDump product, plus 'diff -r -u', to generate a diff between the versions of DemoPortal (the "through-the-web" portion of the PTK) shipped with PTK 0.9.0 and 0.9.2: http://www.zope.org/Products/PTK/DemoProduct_0.9.0_0.9.2.diff/index_html I am tickled pink -- this is exactly the kind of data I need to be able to hang on the the ears of the tiger which is through-the-web development! Tres.

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