Dan wrote:
> There is a functionality which I am interested in and I wonder what is
> the cleanest and most foward compatible way of doing things.
>
> I want models to sprout a suggest() method which would work like
> save() but keep the data in some structure elsewhere that do not
> modify the original data. Any regular call to that object would work
> as if it wasn't modified. I also want a accept() method that would
> commit the changes (and obviously a reject() method to discard them
> and some way to explore the suggested changes).
>
> I am not interested in history at all.
>
> How would you go about implementing those functionalities?
First guess, curious if others think its good idea.
Create model with one2one nullable field "suggestion" and Boolean field
"is_suggestion".
If suggestion is Null then there is no suggestion.
If suggestion is not Null it is id of suggested data.
The idea is to avoid maintaining two duplicate schemas.
Proly change the default Manager to only show is_suggestion == False rows.
def suggest(self, obj):
"""obj is original obj self is suggestion for""
self.is_suggestion = True
self.suggestion = obj
self.save()
def accept(self):
"accept this suggestion"
assert self.is_suggestion
# need more logic if model has foriegn relationships
self.suggestion.delete()
self.suggestion = None
self.is_suggestion = False
def reject(self):
assert self.is_suggestion
# not sure how to delete relation
# self.suggestion.suggestion = None ???
self.delete()
--
Norman J. Harman Jr.
Senior Web Specialist, Austin American-Statesman
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