On Jun 2, 2014, at 1:47 AM, Alex Grönholm <[email protected]> wrote:
> This has been a problem for me for years.
>
> class DeliveryAddress(Base, Address):
> ...
> delivery_method = Column(String)
> ...
>
> @event.listens_for(DeliveryAddress, 'before_insert')
> def before_insert_deliveryaddress(mapper, connection, target):
> settings = object_session(target).query(Settings).one()
> target.delivery_method = settings.default_delivery_method
>
> Is there absolutely no way to encapsulate this logic cleanly in the actual
> class?
I use an attribute event for that, and more often just a simple @validates.
@validates("default_delivery_method")
def _set_delivery_method(self, key, value):
self.settings.delivery_method = value
return value
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