class hr_employee(osv.osv):
_name = "hr.employee"
_description = "Employee"
_inherits = {'resource.resource': "resource_id"}
_columns = {
'resource_id': fields.many2one('resource.resource', 'Resource', ondelete='cascade', required=True)
}
其中resource_id表现出了一对一,并且可以级联删除。