I had a similar needs with generating diffs for tracking revision history a
while back
I ended up pushing everything into a mixin class. It worked a little like
this...
class MutatedChecknObject(object):
def generate_diff(self):
insp = sqlalchemy_inspect(self)
rval = {}
for c in
sqlalchemy_orm.class_mapper(self.__class__).mapped_table.c :
h = getattr( insp.attrs , c ).history
if h[1]:
continue
rval[c] = h[0][0]
return rval
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