class User(BASE, CeilometerBase):
    __tablename__ = 'user'
    id = Column(Integer, primary_key=True)
    sources = relationship("UserSource")


class UserSource(BASE, CeilometerBase):
    __tablename__ = 'user_source'
    id = Column(Integer, primary_key=True)
    name = Column(String(255))
    user_id = Column(Integer, ForeignKey('user.id'))