[Zope-dev] Adding and setting properties from a virtual Specialist
Steve Spicklemire
steve@spvi.com
Wed, 13 Dec 2000 13:48:34 -0500 (EST)
Hi Itai,
>>>>> "Itai" == Itai Tavor <itai@optusnet.com.au> writes:
Itai> "OrderingEntities.getItem(some_id).current_order_id)"> shows
Itai> me the value of current_order_id of the Employee object
Itai> some_id. But I can't figure out how to change the property
Itai> so it get changed in the Employee object. <dtml-call
Itai> "OrderingEntities.getItem(some_id).manage_changeProperties(current_order_id='123')">
Itai> does nothing, it doesn't even trigger the WHEN OBJECT
Itai> CHANGED line (not that I really expected it to work... this
Itai> object is virtual, how can I call changeProperties on it?)
How about 'OrderingEntities.getItem(some_id).propertysheets.TheRightPropertysheet.manage_changeProperties(....)
or you could create an external method to set the property you want...
YourExternalMethod( OrderingEntities.getItem(some_id), theValue)
where
def YourExternalMethod( theObject, theValue):
setattr(theObject, 'current_order_id', theValue)
I think these could/should work...
Itai> Other than figuring out how to get the change to work, I two
Itai> more problems:
Itai> -Eventually the OrderingEntities Specialist will have
Itai> several Racks mapping to several other Specialists, so it
Itai> will end up returning different classes. Should I instead
Itai> create a new ZClass with just the current_order_id property
Itai> and use this class in all the virtual Racks?
This is what I do in most cases... each rack has different SkinScript
to map the attributes of different classes onto the common attribute
set of the single Storage class used by all the racks.
Itai> - How do I add a property to the original object from the
Itai> virtual object (assuming I did not add it manually to the
Itai> Employee class)? Do I call
Itai> self.original_object.manage_addProperty(...) from the
Itai> SkinScript?
I think this should work.... but it will only add the propertysheet
to the instance.. not the class. If the property is completely missing
from the original class then it seems to me either there is really no
real need to save it there... or the class was incomplete somehow to
begin with... and it should be added at the ZClass level..
Just random thoughts...
;-)
-steve
Itai> TIA -- Itai Tavor "Je sautille, donc je suis." C3Works
Itai> itai@c3works.com - Kermit the Frog
Itai> "If you haven't got your health, you haven't got anything"
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