Rental_Asset_SerialNumber_Validation false DataMigration_Flag__c == false && NOT(ISBLANK(Rental_Asset_SerialNumber__c)) && (ISNEW() || ISCHANGED(Rental_Asset_SerialNumber__c)) && ( LEFT(Rental_Asset_SerialNumber__c, 1) <> "," || RIGHT(Rental_Asset_SerialNumber__c, 1) <> "," || CONTAINS(Rental_Asset_SerialNumber__c, " ") ) 借出设备机身号码的前后需要「,」、同时不能有「空白」