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Re: [Zope] Accessing Subobjects of a ZClass Instance
by Tres Seaver 23 Feb '00

23 Feb '00

Nico Grubert <nico(a)beehive.de> writes: > > I created a ZClass containing > -Base Classes both "Object Manager" and "Catalog Aware" > -Subobjects both "Image" and "File". > > In a DTML-Methode all properties of an instance are shown by: > <dtml-in "PARENTS[0].objectValues(['MyProduct'])"> > <tr> > <td><dtml-var myObjNr></td> > <td><dtml-var myObjTitle></td> > .... > > "myObjNr" is the id of each object. > > Some Objects contain a file or an image or both a file and an image. > I upload two images "beach.gif" and "water.gif" to the instance e.g. > "MyObj01". > the tag <img src="<dtml-var myObjNr>/beach.gif"> > this works fine and shows me the image "beach.gif". > What I need to do that I can see all images or even better the whole > content an instance contains ? > Something like ???? > syntax: > <img src="<dtml-var myObjNr>/___content of an instance______"> A DTML Method like the following shows all images contained within a Folder (or within a "folderish" ZClass instance like yours):: <dtml-in "objectValues( 'Image' )"> <dtml-var sequence-item> </dtml-in> -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: [Zope] aquisition and refining
by Tres Seaver 23 Feb '00

23 Feb '00

Alex Burton <burton(a)w3cast.com> wrote: > > Me again (last one for tonight!) > > Aquisition is groovy, but is it possible to refine aquired > properties instead of redefining them from scratch? > > (Creating a standard_html_header in s subfolder and using <dtml-var > standard_html_header> does not produce expected result, that is > grabbing the upper-level's definition of standard_html_header). > > Is there a DTML tag such as <dtml-refine> which, when stated at a > given level, would indicate where to insert sublevel redefinition of > the DTML method? > > Maybe i'm thinking too much of OO inheritance... "Jonothan Farr" <jfarr(a)real.com> replied: > > You know, I've never really gotten this either. Maybe Jim Fulton could explain > for us one more time or else point us at a good explanation of -why- > acquisition begins at the root and goes down the tree instead of starting at > the current level and going up, which I believe is what pretty much everyone > expects it to do when they first run across it. The slides from Jim Fulton's "Acquisition Algebra" talk are online: http://www.zope.org/Members/jim/Info/IPC8/AcquisitionAlgebra/index.html I know the title is intimidating, but I think the talk was "satori-making". Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: [Zope] CatalogAware
by Tres Seaver 23 Feb '00

23 Feb '00

Tom Deprez <tom.deprez(a)uz.kuleuven.ac.be> wrote: > > I've a problem which I can't solve. > > I made a small ZClass and has CatalogAware as base class. > > However, when I add an instance of this ZClass in a folder, and when I've a > ZCatalog (id: TestCatalog) then this instance isn't added in the list of > 'TestCatalog'. I thought that a CatalogAware Class just could do this... > > a) Am I missing here something? > b) I'm not quite sure, but is this adding to a Catolog done automatically > or do you have to specify somewhere in which catalog instance (here > TestCatalog) the object has to be listed? How can I do this? "Loren Stafford" <lstaffor(a)dynalogic.com> replied: > > If you have a non-default catalog ID, you have to do something special in > the manage_add method. It's documented in the How-To on creating a > catalog-aware Zclass. http://www.zope.org/Members/AlexR/CatalogAware CatalogAware instances expect to find and register themselves with a ZCatalog object named "Catalog". If you want them to use a catalog with a different name, you can either: * Modify their class' MyClass_add method to switch them (as described by the HowTo Loren points to). or: * Attach a "proxy" DTML/Python/External Method named "Catalog" which hijacks the lookup to your desired location. I have a How-To describing this technique at: http://www.zope.org/Members/tseaver/inherit_ZCatalog -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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zodb lock
by Garrett G. Hodgson 23 Feb '00

23 Feb '00

i've been trying, with minor success, to figure out how to use ZODB. i've now got a little app that uses a FileStorage db to store Person objects, where a Person has just a name and an age. it works the first time i run it, but subsequent times i get: Traceback (innermost last): File "./TestPersistence.py", line 29, in ? print GetPeople() File "./TestPersistence.py", line 16, in GetPeople app = TryPersistence.App() File "./TryPersistence.py", line 27, in __init__ self.db = ZODB.DB( ZODB.FileStorage.FileStorage( file ) ) File "/usr/local/src/Zope-2.1.3-src/lib/python/ZODB/FileStorage.py", line 262, in __init__ lock_file(f) File "/usr/local/src/Zope-2.1.3-src/lib/python/ZODB/lock_file.py", line 101, in lock_file raise error, ( ZODB.POSException.StorageSystemError: Could not lock the database file. There must be another process that has opened the file. i assume i'm missing some cleanup or finalization, beyond get_transaction().commit() any ideas? (i didn't post the code because it seemed overly lengthy for this question. i can post it if that'd help.) thanks -- Garry Hodgson Every night garry(a)sage.att.com a child is born Software Innovation Services is a Holy Night. AT&T Labs - Sophia Lyon Fahs

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Missing ZClasses?
by Lucas Vogel 23 Feb '00

23 Feb '00

I apologize for the blatant newbie question here, but I was following the documentation trying to create a ZClass, and unless I'm mistaken I don't have a ZClass in my list of objects to create. Is this a product that I have to download first? It doesn't sound right, but if it is where is it because it's not on the list? Also, I downloaded the ZPhotoAlbum-1.0 product to install into zope as well. I copied the .zexp file into my import directory, but it errors out when I try to import it. Is this because of my ZClass problem? Thanks ------------------------------------------- Lucas Vogel, Software Developer Exponent Failure Analysis Associates, Inc. lvogel(a)exponent.com (623)587-6739

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Re: [Zope] Creating a "list of strings" from DTML-Method?
by Tres Seaver 23 Feb '00

23 Feb '00

Soren Roug <soren(a)roug.org> > Organization: Net.conf > To: zope(a)zope.org > Subject: [Zope] Creating a "list of strings" from DTML-Method? > > I'm working on a product where I want to create a property that is a > selection and allows you to select between a list of folders created in > the parent folder. > > When you add a property in the property sheet the text directly > above says: > | > |For "selection" and "multiple selection" properties enter the name of > |a selection variable |in the "Value" field. The selection variable is > |a property or method that returns a list of strings from which the > |selection(s) can be chosen. > | > After fiddling around a bit I realized that the only methods that > qualify are Z SQL methods. That's not what I'm looking for. Does > anybody know how to do this with a DTML method or has anyone > subclassed the DTML method to a class that returns a list of strings > instead of rendering the text? Jim Washington <jwashin(a)vt.edu> > > Hi, Soren > > You might want put the following in a new dtml method and see if it does > what you need: > > <dtml-call "REQUEST.set('folderlist', objectIds('Folder'))"> > <dtml-return folderlist> > > Or you might make the list like so: > > <dtml-call "REQUEST.set('folderlist', ['folder1', 'folder2', > 'folder3'])"> > <dtml-return folderlist> > > IIRC, dtml-return is relatively new to zope, so if it does not work, you > may need to upgrade. The temporary isn't needed in this case (might be if you build the list up programmatically):: <dtml-return expr="objectIds( 'Foler' ) )"> or:: <dtml-return expr="[ 'folder1', 'folder2', 'folder3' ]"> work fine. Tres. -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: [Zope] stupid, but neccessary q'n
by Tres Seaver 23 Feb '00

23 Feb '00

Tom Deprez <tom.deprez(a)uz.kuleuven.ac.be> asked: > > When Adding properties to a ZClass, I came across the type Token. > > What does this mean? Geir B Hansen <geirh(a)funcom.com> replied: > > I wondered about this for a while too, but i think found out in > the end . > > a 'tokens'-field is like a 'lines'-field > except the values are comma-separated instead of > newline-separated.. > > like this : > > item1,item2,item3 etc.. Almost -- it is space-delimited, not comma-delimited: "item1 item2 item3" The clincher is the implementation, in $ZOPE_HOME/lib/python/ZPublisher/Converters.py:: def field2tokens(v): if hasattr(v,'read'): v=v.read() else: v=str(v) return split(v) # this is Python's string.split() -- ========================================================= Tres Seaver tseaver(a)palladion.com 713-523-6582 Palladion Software http://www.palladion.com

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Re: [Zope] For loops in dtml
by J C Lawrence 23 Feb '00

23 Feb '00

On Wed, 23 Feb 2000 13:50:37 -0500 (EST) Jeff K Hoffman <jeff.hoffman(a)goingv.com> wrote: > On Wed, 23 Feb 2000, J C Lawrence wrote: >> On Wed, 23 Feb 2000 16:18:20 +0000 Chris Withers >> <chrisw(a)nipltd.com> wrote: >> >> > Anyone know how I can do the equivalent of the following in >> dtml: ...various looping constructs... >> >> Basically you end up using an external method, not DTML. > Ummm, why? If you happen to know the compleat set of loop values prior to entering the loop, then yes, you can use various sorts of range(), or dtml-in over a list value to do it. However, that's not the general case of a loop (which contains a conditional as he showed), and DTML just doesn't attempt to handle looping constructs where the loop termination conditions are determined during the execution of the loop. -- J C Lawrence Home: claw(a)kanga.nu ----------(*) Other: coder(a)kanga.nu --=| A man is as sane as he is dangerous to his environment |=--

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Permissions, roles and creating instance of ZClass
by Jon Prettyman 23 Feb '00

23 Feb '00

I have a Product/ZClass called UserProperties/UserPropertiesClass. I have a folder Users which has mapped users with a role of contentSubscriber to the permission ``Add UserPropertiess''. I have an index_html file in Users that shows that an authenticated user has the role contentSubscriber and shows that the authenticated user has permission to ``Add UserPropertiess''. <dtml-if "AUTHENTICATED_USER.has_permission('Add UserPropertiess',PARENTS[0])"> Can Add UserPropertiess <dtml-else> Can NOT Add UserPropertiess </dtml-if> When an authenticated user calls /Users/ they see Can Add UserProperties. When the user calls /Users/manage they see the managment screen, if they select [ADD]UserProperities they get the login screen again. The URL that is getting accessed is: /Users/manage_addProduct/UserProperties/UserPropertiesClass_factory and the authentication is failing. I'm using GenericUserFolder with cookie validation and it appears that my _gufauth cookie gets set and then deleted through this transaction. -Jon

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Re: [Zope] For loops in dtml
by J C Lawrence 23 Feb '00

23 Feb '00

On Wed, 23 Feb 2000 16:18:20 +0000 Chris Withers <chrisw(a)nipltd.com> wrote: > Anyone know how I can do the equivalent of the following in dtml: ...various looping constructs... Basically you end up using an external method, not DTML. -- J C Lawrence Home: claw(a)kanga.nu ----------(*) Other: coder(a)kanga.nu --=| A man is as sane as he is dangerous to his environment |=--

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