Hmm... possibly I did not explain my needs : What I need to do is manipulate the attribute of a "folderish" object ( ie. an object that can contain other objects ) that determines what objects are allowed to be contained by my object. I need to do this at instantiation time , *NOT* definition time. I seemed to have accomplished this by manipulating the "meta_types" attribute... but is this a valid way to attain this behavior? thanks again- Josh
Josh Zeidner <jmz_phylogenic@hotmail.com> asks:
I am currently trying to define a Z-Class that inherits from Object Manager that has the special behavior of being able to change its "allowable sub-objects" on a per-instance basis.
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ex.
I instantiate the class at a particular location I want this object to only be able to contain objects of type "AppleObject" and "OrangeObject".
I instantiate the class at another location and I want this object to only contain objects of type "LemonObject" and "LimeObject".
note that the difference here is that both of the containers are of the same type.
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is it possible to have this flexibility after the ZClass has been defined?
If you are defining the interface (rather than accepting the default "Contents" view), then you can do something like::
<select name="toAdd"> <dtml-in "filtered_meta_types( AUTHENTICATED_USER )" mapping> <dtml-if "name in allowed_types"> <option value="&dtml-name;"> <dtml-var name> </dtml-if> </dtml-in> </select>
where 'allowed_types' is a tokens/lines property of the instance.
Making this happen in the stock management interface is trickier -- you need to overried either all_meta_types(), but finding the list of possible types, so that the list you return contains the dictionaries required by filtered_meta_types(). I can't see easily off hand how to do this from within a Python Method -- I think I would have to drop down to an External Method, or create a new Python base class to implement this.
Tres. -- ========================================================= Tres Seaver tseaver@palladion.com 713-523-6582 Palladion Software http://www.palladion.com
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