[Zope] Add properties to ZClass instance?

[Chris Muldrow]

In the propertysheets.py file in the Zope Source, you'll find some help for
modifying and adding properties programmatically. I've included an example

Credit goes to Tazzzzz at http://www.zope.org/Members/tazzzzz/addZClasses
for getting me started.

def addFLSNews(newdir, newid, data, newtitle, REQUEST=None):
      """ """
      # This sucks in some data from Zope to form the body of the ZClass.
      # It also grabs an  id, title and a directory

     
      
      # This creates a new object of Zclass FLSNewsStory using the data
inside your chosen directory
         newob=newdir.Control_Panel.Products.FLSNewsStory.FLSNewsStory(data)
       
      # This sets the id of the object
        newob._setId(newid)
    
      # this actually sets the object
        newdir._setObject(newid, newob)
      
      # this sets the title of the object
        newob.title=newtitle
     
      # this is a second function that parses the data to get a value called
Author
        # the getAuthor part is unimportant to this discussion--just know a
value is set for the variable varAuthor

      varAuthor=getAuthor(data)
     
       # this sets a property in the FLSNewsProperties propertysheet of
FLSNewsStory called Byline to the value of varAuthor
        
newob.propertysheets.FLSNewsProperties.manage_changeProperties({'Byline':var
Author})
       # if your Zclass doesn't already have properties attached, you can
also use something like newob._setProperty('Byline', varAuthor,
type='string') to set a property in the basic property sheet and something
like this: newob._updateProperty('Byline', varAuthor) to update a property
that exists


Now somebody who's a better Zoper than I can check and see where I screwed
up this explanation!



-- Chris Muldrow, muldrow@mac.com


> From: "Paul Godley" <pdg@tcdi.com>
> Date: Thu, 29 Mar 2001 17:32:02 -0500
> To: <zope@zope.org>
> Subject: [Zope] Add properties to ZClass instance?
> 
> I've got a ZClass to which I'd like to add (variable) properties when
> the instance is created. I made a "Basic" propertysheet and tried
> "manage_addProperty" but Zope reports that properties cannot be added. I
> can add properties to DTML Documents.
> 
> Can you construct a ZClass such that you can add properties to an
> instance, both via management screens and programatically?
> 
> Thanks.
> 
> -P
> 
> --
> Technology Concepts & Design, Inc.
> 
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