Hi All,
So, say you have some common methods and field definitions that you want
to share across a bunch of mapper classes. My python head says that
these should all go in a base class, say, for example:
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.schema import Column
from sqlalchemy.types import Integer, String, DateTime
Base = declarative_base()
class TheBase(Base):
id = Column(Integer, primary_key=True)
ref = Column(Integer, nullable=False, index=True)
valid_from = Column(DateTime(), nullable=False, index=True)
valid_to = Column(DateTime(), index=True)
entered_by = Column(String(255), nullable=False, index=True)
deleted_by = Column(String(255), index=True)
def some_func(self, x,y):
...
But, this results in:
sqlalchemy.exc.InvalidRequestError: Class <class 'TheBase'> does not
have a __table__ or __tablename__ specified and does not inherit from an
existing table-mapped class.
How should I create a class like this? This isn't about table
inheritance or the like and I'm *sure* I was told an easy solution for
this specific use case before, but I can't find it for the life of me now...
Chris
--
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- http://www.simplistix.co.uk
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