November 1999 - Zope-Dev

RE: [Zope-dev] Keyword Indexes in ZCatalogs
by Michel Pelletier 22 Nov '99

22 Nov '99

> -----Original Message----- > From: Alexandre Ratti [mailto:alex@gabuzomeu.net] > Sent: Sunday, November 21, 1999 3:38 PM > To: zope-dev(a)zope.org > Cc: zen(a)cs.rmit.edu.au > Subject: Re: [Zope-dev] Keyword Indexes in ZCatalogs > > > Hello, > > > Thanks for this information. I tested Keyword indexes in a > simple keyword > search form for ZClass documents. It works beautifully. I'll > summarize it > in a mini-howto. Thank you! -Michel

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RE: [Zope-dev] ZServer FastCGI patch for IRIX (and others?)
by Brian Lloyd 22 Nov '99

22 Nov '99

> Below is a patch to let ZServer's FastCGI support work with > FastCGI client > implementations that don't properly close the STDIN > sub-stream. On the > IRIX/Apache/cgi-fcgi combo used where I work, the client side > doesn't seem > to know when it's done sending STDIN data, and thus the > ZServer side simply > hangs forever waiting for it. The patch below makes ZServer > ignore STDIN > altogether if there is no Content-Length, and also stop > looking for more > STDIN data if Content-Length or more bytes have already been read. Thanks - I've checked this in. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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RE: [Zope-dev] Is _getOb() best way to grab a ref to a particular object?
by Brian Lloyd 22 Nov '99

22 Nov '99

> I need to grab a reference to a particular object in the ZODB from an > external method, bypassing acquisition. Is this the right > way to do it: > > def test(self, REQUEST=None): > """doc string""" > myobj = > REQUEST.PARENTS[-1].aTopLevelFolder.anotherFolder._getOb('id_o > f_myobj') > ...do stuff with myobj: myobj.title, myobj.index_html, > myobj.property = 123 ... Maybe, maybe not... _getOb will not return an acquired object, but if the object exists it _will_ be returned as a "wrapped" object so acquisition will be preserved in the result. I'm not clear from your example whether this is what you want. If you want the *resulting* object to be non-acquiring, you'll want to do something like: def test(self, REQUEST=None): """ """ # get object named 'foo' from self, but dont allow it # to be found via acquisition. obj=self._getOb('foo') # while we know that foo is not acquired from above, it # is still wrapped in the context of 'self', so to disable # acquisition we need to unwrap it. non_aquiring_obj=obj.aq_base ... Hope this helps! Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Overriding __getattr__ for requests only.
by Jeff K. Hoffman 22 Nov '99

22 Nov '99

Hello, everyone. I am trying to write a new subclass of OFS.Folder (as a python product) to do the following: When a user requests /myFolder/index_html, myFolder will search itself, then its list of 'parents', returning the attribute from one of them if they have it, and raising an AttributeError if not. I have had some moderate success by overloading __getattr__ as follows: def __getattr__(self, name): try: return OFS.Folder.Folder.__getattr__(self, name) except: for parent in self.parentList: try: return getattr(parent, name) except AttributeError: pass raise AttributeError, name This works, in the sense that I can "inherit" features from the parents, but I think there are some fundamental flaws in my approach for the following reasons: o I would like for the user to still be able to create attributes in my folder with the same name as one of the attributes in the parents. This does not work, currently. If I define index_html in a "parent" folder and attempt to do the same in a "child", I get a 'The id index_html is invalid - it is already in use.' error. o Whenever I click on a folder which has one or more "parents" in the top-level management interface (http://localhost/manage) I get a NameError for 'n_'. This does not occur, however, when I manage my folder via http://localhost/myFolder/manage. So, my question is, is there any way for me to achieve this behavior without causing the problems above? I am thinking there must be a way to search the parents if AND ONLY IF it is for an incoming web request. I have posted the code to zope.org at: http://www.zope.org/Members/jkhoffman/TransFolder.tgz Once you install the product, click the 'Parents' tab to assign a parent. This thing is barely working, and is one of my first python products, so please don't laugh at me too much. :) If anyone can give me a push in the right direction I would be extremely grateful. --Jeff

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Problem with attributes and/or aquisition?
by Bill Anderson 22 Nov '99

22 Nov '99

OK, in a dtml-in iteration of PARENTS[-1], I have the following code: ... <dtml-if "meta_type=='Folder'"> <dtml-if "_.hasattr('_[id]','SiteMenu')"> <dtml-in "_[id].objectValues(['Folder'])"> <dtml-if "_.hasattr('_[id]','SiteMenu')"> ...do stuff with RXML and tables ... And In my root folder, I have anumber of folders, some with SiteMenu, some without. Problem: None of the folders appear in my menulist. If I negate the condition (<dtml-if "not ...">), all my folders show up. I can't use <dtml-if SiteMenu> because this will be called from within a folder (sometimes) that has that property set. I don't recall having this problem before .. but it has been a long night/morning. Anyone know what the heck I am missing (Besides several hours of needed sleep)? IIRC -- "They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown." -- Carl Sagan

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An even smaller XMLDocument patch
by Gabor Melis 22 Nov '99

22 Nov '99

Hi gents, I took the easy way out (my problem was posted a few days ago) and avoiding confrontation with ISO-8859-* encodings I just told the browser to use utf-8. It was done to documentEdit.dtml and elementEdit.dtml and to all my pages with xml input or output in them. Of course it means that one must encode pages with XML stuff in them in utf-8. For the management pages it is OK since they contain only ASCII stuff. For your pages though ... Still, I think it is justifiable and probably right. Gabor

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FYI: A possible bug in manage_pasteObjects (submitted to the Collector)
by Itamar Shtull-Trauring 22 Nov '99

22 Nov '99

It looks like manage_afterClone should be called with the original object passed to the function, but in fact manage_pasteObjects passes the cloned object, which is rather pointless. -------- Original Message -------- Date: Mon, 22 Nov 1999 12:22:05 +0200 (IST) From: Noa Harvey <nharvey @ pob.huji.ac.il> In lib/OFS/CopySupport.py In the function manage_pasteObjects the following line appears: ob=ob._getCopy(self) ob.manage_afterClone(ob) Passing ob as an argument doesn't make sense because the function is being called on ob, (so self is already ob) it would make more sense to to something along the lines of: original_ob=ob ob=ob._getCopy(self) ob.manage_afterClone(original_ob) That way REQUEST and other useful information will be available when overriding manage_afterClone.

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Python base classes again (and now I'm really stuck)
by Itamar Shtull-Trauring 22 Nov '99

22 Nov '99

I want to create a Python base class that inherits from the ObjectManager and has the "Subobjects" tab in the ZClass management screen. Inheriting from OFS.ObjectManager.ObjectManager does not do this - I need to inherit from ZClasses.ObjectManager.ObjectManager. I still don't know how to have the Subobjects propertysheet thing work. I've tried the two ways I listed in my last email of doing this, but I can't get it to work. One way was: class MyObjectManager(ZClasses.ObjectManager.ObjectManager): " .... " class ZMyObjectManager: """Mix-in for Object Management """ _zclass_=myObjectManager propertysheets=ZClasses.ObjectManager.ZObjectManagerPropertySheets() manage_options=( {'label': 'Subobjects', 'action' :'propertysheets/subobjects/manage'}, ) and then register ZMyObjectManager as a base class in __init__.py. The other way was: class MyObjectManager(ZClasses.ObjectManager.ObjectManager): propertysheets=ZClasses.ObjectManager.ZObjectManagerPropertySheets() manage_options=( {'label': 'Subobjects', 'action' :'propertysheets/subobjects/manage'}, ) and register that as the base class. Neither of them work. -- Itamar S.T. itamars(a)ibm.net

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DTML question
by John Fohrman 21 Nov '99

21 Nov '99

Hi Everyone -- I'd greatly appreciate any help. Question by example: if I have a form: <FORM action=showme> <INPUT name=first_name value=Jim> <INPUT name=email value=jim(a)whereever.com> <INPUT name=first_name value=Bob> <INPUT name=email value=bob(a)whereever.com> <INPUT type=submit value=OK> which calls "showme" <dtml-in email> <dtml-var "_['sequence-item']"> </dtml-in> it returns jim(a)whereever.com bob(a)wherever.com but how would I return: Jim jim(a)whereever.com Bob bob(a)whereever.com Thanks! -- John

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Re: [Zope-dev] Keyword Indexes in ZCatalogs
by Alexandre Ratti 21 Nov '99

21 Nov '99

Hello, Thanks for this information. I tested Keyword indexes in a simple keyword search form for ZClass documents. It works beautifully. I'll summarize it in a mini-howto. Cheers. Alexandre At 11:56 21/11/1999 +1100, Stuart 'Zen' Bishop wrote: > > Could someone explain how to use Keyword Indexes in ZCatalogs? In a > > ZCatalog, we now have 3 index types: Text Index, Field Indexes and Keyword > > Indexes. (snip) >I have a ZClass with a 'lines' type property (a list) called course_logs > >If I then search using: > <dtml-in "Catalog(course_logs='Feedback')"> >This returns all catalog entrys which contain 'Feedback' as one >of the course_logs elements. This is essential for building many-many >relationships. > >-- > ___ > // Zen (alias Stuart Bishop) Work: zen(a)cs.rmit.edu.au > // E N Senior Systems Alchemist Play: zen(a)shangri-la.dropbear.id.au > //__ Computer Science, RMIT WWW: http://www.cs.rmit.edu.au/~zen

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