[Zope] non-zope objects in zope

[Sam Gendler]

I am answering my own question so the next person who bumps into it 
might have more luck tracking it down.  The following examples are 
taken from the 'Security' chapter of the Zope Developers Guidde (ZDG).  
Note that I still wish there were a way to use external objects 
unchanged.  Particularly because I have a class heirarchy, where 
customer objects create campaignh objects, but I want to to return 
campaign objects that have zope security info, so I have to create 
instances of my zopified objects from the non-zope objects...very 
wasteful and slow.

--sam

# an external method that returns Book instances

from AccessControl import ClassSecurityInfo
from Acquistion import Implicit
import Globals

class Book(Implicit):

   def __init__(self, title):
     self._title=title

   # Create a SecurityInfo for this class
   security = ClassSecurityInfo()
   security.declareObjectPublic()

   security.declarePublic('getTitle')
   def getTitle(self):
     return self._title

Globals.InitializeClass(Book)

# The actual external method
def GetBooks(self):
   books=[]
   books.append(Book('King Lear').__of__(self))
   books.append(Book('Romeo and Juliet').__of__(self))
   books.append(Book('The Tempest').__of__(self))
   return books


Or, if you can't modify the original object, try this:

# an external method that returns Book instances

from AccessControl import ClassSecurityInfo
from Acquisition import Implicit
import bookstuff
import Globals

class Book(Implicit, bookstuff.Book):
   security = ClassSecurityInfo()
   security.declareObjectPublic()
   security.declarePublic('getTitle')

Globals.InitializeClass(Book)

# The actual external method
def GetBooks(self):
   books=[]
   books.append(Book('King Lear'))
   books.append(Book('Romeo and Juliet'))
   books.append(Book('The Tempest'))
   return books

On Apr 27, 2004, at 6:26 PM, Sam Gendler wrote:

> I used to be a fairly knowledgable zope user many years ago, but 
> things have moved on and I've forgotten most of what I know.  I have a 
> largish library of python modules which define a number of classes 
> which have methods that perform work in a product.  Currently, much of 
> the system is managed vai commandline tools which utilize the library. 
>  We want to ad a web interface, and I figured zope would be a natural, 
> since everything is already in python.
>
> I created external methods which return instances of classes, but if I 
> try to use those instances from within dtml (iterating over a list of 
> them, for instance), I just get prompted for authentication 
> credentials.  I seem to recall that there was some way of applying 
> zopishness to external object instances at runtime, but I can't 
> remember what that mechanism is, and I couldn't find it in either the 
> zope book or the zope bible I went out an bought.
>
> For example, if I have a customer class which has name, id, and 
> revenue members, and I create an external method to return a list of 
> customer instances, I cannot do the following
>
> <dtml-in extListCustomers prefix="cust">
> <dtml-var expr="cust_item.id"> <dtml-var expr="cust_item.name"> <dtml 
> var expr="cust_item.revenue">
> </dtml-in>
>
> Thanks
>
> --sam
>
>
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