On Fri, Aug 26, 2016 at 2:24 AM, Robert Minsk <rmi...@gmail.com> wrote: > I am using automap_base to reflect a table. > > metadata = MetaData() > metadata.reflect(bind=engine, only=['hosts']) > automap = automap_base(metadata=metadata) > automap.prepare() > > Hosts = automap.classes.hosts > > The mac_address column in Hosts is binary and would like to to replace the > mac_address with some sort of getter/setter to decode/encode the address. I > have not found an example of doing this with an automapped table. Is there > a easy way to do this?
You can override specific columns on an automapped table by pre-declaring the class: http://docs.sqlalchemy.org/en/latest/orm/extensions/automap.html#specifying-classes-explicitly I haven't tried it, but I would assume that you can use any of the normal facilities for modifying column behaviour at that point. For example, I think you could do something like this: class Hosts(automap): __tablename__ = 'hosts' _mac_address = Column('mac_address', BINARY) @property def mac_address(self): return decode_mac_address(self._mac_address) @mac_address.setter def mac_address(self, value): self._mac_address = encode_mac_address(value) If you want to be able to query using the decoded values, you could also try hybrid properties. Hope that helps, Simon -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
