Re: [FR-devel] Database slot-type addtion

[Laurent Julliard]

Rich Kilmer wrote:
> Proposed addition of a slot type of 'hash':
>
> Added methods to slot:
>
>  #slot.put(key, value) 
>  #slot.get(key) #=> value
>  #slot.is_hash_slot? 
>  #slot.hash # turn slot into hash slot
>
> Right we could just set the data to a hash like this:
>
>  slot.data = {}
>  slot.data[key]=value
>  slot.data[key] #=> value
>
> But modifying the internal object's state as stored in a data slot does
> not propagate notifications events, whereas the new method (hash slot)
> would allow a subscriber to be notified.
>
> Thoughts?
>
> -rich

While I think the way the new functionality is implemented remains up to 
you (I think Curt and Horacio had some interesting variant) I definitely 
support this new feature.

I have been using FreeBASE for some time now and in several occasion I 
was tempted to store some values in slot attributes @slot.attr_... but 
problem is that it doesn't allow for notification. So I finally opted 
for data subslots for each attribute where notification was requested.

Your suggestion fixes this annoying problem.

Laurent


--
Laurent JULLIARD - Xerox R&T/SSTC/XPA - Open Source team
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