March 2000 - Zope-Dev

Returning values for dtml-in
by jiva＠devware.com 29 Mar '00

29 Mar '00

What kind of result do I need to return from a python method in order for the return value to be usable by <dtml-in> ? In other words, I want to do: def blah(self): l = [{val : 'blah1'}] return l then in my dtml code do: <dtml-in blah> <dtml-var val1> </dtml-in> Am I missing something? -- You will be reincarnated as a toad; and you will be much happier.

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How can you store a Zope XML on a local drive?
by noel 29 Mar '00

29 Mar '00

Hello, how can I store the contents of a Zope XML documents' edit window externally. I tried exporting the xml doc object but the file that is created has loads of additional Zopeish XML tags. Can I reference the editForm widows' contents of an object directly? eg . if an objetcs Edit form window contained the following. <mytag>data</mytag> how can the above contents of the form be sent to a local file,say on the c: drive? I would apprecitate any ideas, Garrett Crowley.

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Python API? - handling file properties
by Chimezie Thomas-Ogbuji 28 Mar '00

28 Mar '00

I'm trying to put up a page where company documents can be retrieved and added by users. I created a Zope Product and ZClass (CompanyObjects and CompanyDocs respectively). I inherited the CompanyDocs ZClass from the File Class, however I'm not sure how to access the File functionality via python. I want to create a python method that sets the Document properties and file from a form, however I don't know how to update/upload the file passed in from the form into the CompanyDocs ZClass. This is the python method (using the "Adding A ZClass programatically HOWTO" as a start) def addACompanyDoc(self, id, file, title, author, desc, REQUEST=None): """ """ # Get the actual destination object, using the this() # method, to be sure we get it in the right context.. self=self.this() # Create the new instance newob=self.Control_Panel.Products.CompanyObjects.CompanyDoc(id) newob.id=id #change properties using the example in the "Using Z Class Instances" newob.manage_changeProperties({ 'title':title 'author':author 'description': desc }) # Add the new instance to the target object self._setObject(id, newob) How do I change the object content to the file passed in from the form? Is there a more elegant solution that this? The PDFile example was helpful however it assumes you are adding the file via the Zope management interface, not using External methods and python. Also is there a python module file that defines all the methods that can be called on Zope objects (the self argument to all python external methods)? I'm pretty sure its not ZClass.py. This would be infinitely helful since there is really no good resource for the Zope Python API (besides the HOWTOS) Chimezie Ogbuji

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Cryptic error messages...
by Brett Carter 28 Mar '00

28 Mar '00

I have two objects in my database I can't delete - I get the following error when I try:  Traceback (innermost last): File /usr/local/Zope-2.1.2-linux2-x86/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /usr/local/Zope-2.1.2-linux2-x86/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/local/Zope-2.1.2-linux2-x86/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /usr/local/Zope-2.1.2-linux2-x86/lib/python/ZPublisher/Publish.py, line 165, in publish File /usr/local/Zope-2.1.2-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_delObjects) File /usr/local/Zope-2.1.2-linux2-x86/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: manage_delObjects) File /usr/local/Zope-2.1.2-linux2-x86/lib/python/OFS/ObjectManager.py, line 395, in manage_delObjects (Object: ElementWithAttributes) File /usr/local/Zope-2.1.2-linux2-x86/lib/python/OFS/ObjectManager.py, line 267, in _delObject (Object: ElementWithAttributes) File /usr/local/Zope-2.1.2-linux2-x86/lib/python/ZODB/Connection.py, line 396, in setstate SystemError: (see above) I'm also getting: ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000\007x' from the z2 server I'm running zope 2.1.2 on linux, TIA -Brett

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Interfaces Wiki
by Jim Fulton 28 Mar '00

28 Mar '00

We've put up an Interfaces wiki on zope.org at http://www.zope.org/Members/michel/Projects/Interfaces. This is for documentation of the Zope APIs. It's a wiki so anyone (who is a zope.org member) can contribute (including adding questions and comments) so have fun and be nice. :) I mention this because you'll see messages from me and others providing links to pages in this site for your comment and emjoyment. Jim -- Jim Fulton mailto:jim@digicool.com Technical Director (888) 344-4332 Python Powered! Digital Creations http://www.digicool.com http://www.python.org Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.

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Secrets of the object manager hooks revealed!
by Jim Fulton 28 Mar '00

28 Mar '00

There are three hooks that object managers call when adding deleting and cloning objects. I've written some documentation for these at: http://www.zope.org/Members/michel/Projects/Interfaces/ObjectManagerItem Note that manage_afterClone is often implemented needlessly. There are currently cases of this in the Zope distribution. Sigh. Hopefully, this documentation will clarify. (If not, fix it! ;) Jim -- Jim Fulton mailto:jim@digicool.com Technical Director (888) 344-4332 Python Powered! Digital Creations http://www.digicool.com http://www.python.org Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.

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Re: [Zope-dev] Passing data to/from Python
by Josh Zeidner 28 Mar '00

28 Mar '00

>3. What if my Python function in my external method wants to >return information to my DTML method? For instance, how do I >return a Python list, and what do I do in my DTML method to >process it (e.g., output a line for every member of the list)? You can just return a dictionary from your external method and use the <dtml-in "externalMethodName(1,222)">. inside the dtml-in tags you can reference the index or the value of each dictionary item using tags like <dtml-var sequence-item> , <dtml-var sequence-value> ( double check this syntax in the DTML guide ). Basically, anything you can do in Python CGI you can do in Zope. Take a look at DC COM Product. May be just what you are looking for... -Josh Zeidner ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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Security Problem: Browser, Zope or a mixture?
by Chris Withers 28 Mar '00

28 Mar '00

I'm reposting this here in the hope that someone can at least explain what's going on... I've mocked it up in the attached .zexp if anyone wants to try it out themselves. I have a site with a subfolder. This is private and so has 'view' permission only to a 'user' role and the usual 'manager' role. I have a file, index_html in the mockup, in this subfolder, which includes an image called 'black' from the root of the site. The root folder has 'view' granted to the anonymous user. I added my users with the 'user' role, user1 in the mockup - password 'user1', to the subfolder's acl_users . However, when I went to view the subfolder and logged in as user1, the page loaded fine, except for the 'black' image. I was asked to authenticate again but the only way I could get past this was to use user2, password 'user2', who has manage access to the whole site. This is really confusing as 'black' comes from the root of the site, which is viewable by even the anonymous user, and viewing the black image on its own in another browser session, even using the URL from the HTML generated for the subfolder index_html, worked fine and no authentication was requested. Obviously giving these users manager access to the whole site was unacceptable. I managed to solve the problem, see user3 - password 'user3' in the mockup, by creating the user in the root acl_users folder and giving them no roles. Then, giving them 'user' as a local role in subfolder. I've tried this with Zope 2.1.4 and 2.1.6 on Linux and NT4, Netscape 3.04, Netscape 4.7 and Explorer 5.1 all with the same result. Anyone know what's going on? Chris

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RE: [Zope-dev] Policy question: correct location to put member contributed libraries
by Andrew Wilcox 27 Mar '00

27 Mar '00

At 10:42 AM 3/27/00 -0500, Brian Lloyd wrote: >Probably the best place is a package in the > lib/python/Shared/ >directory of the Zope installation. This is the >place for packages that are not product-specific. >For example, lib/python/Shared/DC contains packages >from Digital Creations - you might want to put your >stuff in lib/python/Shared/Foo/PersistentListDict >(where "Foo" is your organization or some other >contextual name to distinguish your packages). > >Hope this helps! Hmm... To store packages by the name of my organization would imply a degree of ownership that I'm not sure I want for an open source library. Wherever they go, they had better well darn *stay* there, or existing objects of the class in the ZODB won't be able to be unpickled. (Do I have this right?) I may want to turn active maintenance of the library over to some other volunteer someday... Does simply lib/Python/Shared/PersistentListDict/(*.py) risk namespace clashes too much? Thanks! Andrew

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Catalog OR bug
by Jason Spisak 27 Mar '00

27 Mar '00

One more thing, The test report <dtml-var standard_html_header> <dtml-in "Catalog(text_index='foo OR zzz')"> <dtml-var id> </dtml-in> <dtml-var standard_html_footer> if foo is in the index and zzz is not, works fine in 2.1.1, but breaks in 2.1.6. I know that's not much help, but it's a start. All my best, -- Jason Spisak 444(a)hiretechs.com

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