[Zope] Add a property with a class constructor

[Dieter Maurer]

Hi Richard

Herv=?iso-8859-1?Q?=E9?= Richard writes:
 > ...
 > for example when you create a 
 > new class,  the default script class constructor use the function 
 > CreateInObjectManager(...) :
 > 
 > <dtml-with "TotoClass.createInObjectManager(REQUEST['id'], REQUEST)">
 > 
 > But when i read the online help (Zope 2.3) i see :
 > 
 > ObjectManager 
 > 
 >      An ObjectManager contains other Zope objects. The
 >      contained objects are Object Manager Items.
 > 
 >      Creating Objects in an ObjectManager
 > 
 >      To create an object inside an object manager use
 >      manage_addProduct:
 > 
 >              self.manage_addProduct['OFSP'].manage_addFolder(id, title)
 > 
 > 
 >      In DTML this would be:
 >                
 > <dtml-call"manage_addProduct['OFSP'].manage_addFolder(id,title)">
 > 
 >  .....
 > 
 > 
 > Probably something is missing to me, it seem like 2 methods to do the same 
 > thing :
 > -  createInObjectManager(..)
 > -  manage_addProduct['OFSP'].manage_addFolder(id, title)
With "createInObjectManager" you are one step further:

  You are already in the context of the correct product, such
  that you can access your class.

  This is not yet the case when you use "manage_addProduct....".
  In this context, your class is not yet known.
  Only "manage_addProduct" is available, but it is able to
  bring you in the context of any product.
  This way, you can access the constructors defined by a
  product and use them to create product related objects.

 > > Otherwise, you may need to add properties to a property sheet.
 > In this case i think it is not possible because i want to add a different 
 > number of properties each time i create a new object.
That should not be a problem.
Of course, you need an application specific way to determine
which properties you need. Once you know, which one, you
can simply create them and give them values.



Dieter