OpenERP 6.1表现一对一，可以级联剔除

OpenERP 6.1表现一对一，可以级联删除

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)    }