support explicit SERIAL on postgresql

[Mike Bayer]

No description provided.

[Mike Bayer]

here is a recipe to get this right now:

from sqlalchemy import Column, Integer, String, create_engine, Sequence
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

from sqlalchemy.ext.compiler import compiles


class SERIAL(Integer):
    pass


@compiles(SERIAL, "postgresql")
def _serial(element, compiler, **kw):
    return "SERIAL"


engine = create_engine('postgres://scott:tiger@localhost/test', echo=True)
Base = declarative_base()


class Entity(Base):
    __tablename__ = 'person'

    id = Column(SERIAL, primary_key=True)
    id2 = Column(SERIAL, primary_key=True)
    label = Column(String(64))


Base.metadata.drop_all(engine)
Base.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
session = Session()

session.add(Entity(label="One label"))
session.flush()

[Mike Bayer]

has a workaround, nobody asking for it, moving out priority