On Jun 25, 2008, at 1:45 PM, sandro dentella wrote:
Hi,
I'm adding validation to a (generic) gtk sql editor.
The first thing I'd like to know is if I can reach the old values
of an instance after I modified it (before committing).
The reason is that I'd like to give the possibility to have new
and old values in the validation of the record.
thanks in advance
the full historical data for an attribute is available as:
from sqlalchemy.orm import attributes
hist = attributes.get_history(attributes.instance_state(myobject),
'someattribute')
the return value is a tuple of (newvalues, unchangedvalues,
deletedvalues) and is the same form for collections and scalars.
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