When_Apply_Required true Ischanged(ApprovalProcess_Status__c) && Text(ApprovalProcess_Status__c) = '已填写完并申请' && OR( Isnull(Maintenance_Contract__r.Service_Contract_Staff__c) /* Isnull(Maintenance_Contract__r.Service_Contract_Staff__c)*/ ) 维修合同里没有设定「主担当者」！