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id = Column(Integer, primary_key=True)
name = Column(String)
# Use default=func.now() to set the default hiring time
# of an Employee to be the current time when an
# Employee record was created
hired_on = Column(DateTime, default=func.now())
department_id = Column(Integer, ForeignKey('department.id'))
role_id = Column(Integer, ForeignKey('roles.role_id'))
# Use cascade='delete,all' to propagate the deletion of a Department onto its Employees
department = relationship(
Department,
backref=backref('employees',
uselist=True,
cascade='delete,all'))
role = relationship(
Role,
backref=backref('roles',
uselist=True,
cascade='delete,all'))