On my project, i use __getattr__ for adding column deifinition to object
class
Such as:
def __getattr__(self,attr):
...
my_load_function(...)
session.refresh(self)
...
return getattr(self,attr)
It works, but refresh loses changes on this object. I cannot flush, because
it used for another function.
I found solution
session.refresh(self, attribute_names=['attr_name'])
But it will raise exception
sqlalchemy.exc.InvalidRequestError: No column-based properties specified
for refresh operation. Use session.expire() to reload collections and
related items.]
I already tried use session.expire(self) and session.expire(self,
attribute_names=['attr_name'])) before and after refresh, but nothing
changed
Can someone help me with this eror?
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