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Ryan MeyerRyan Meyer 

Second set of eyes on a basic trigger where AddError is not working

Hi - I have a basic trigger that works as follows: user types in HKG in a field and the trigger searches for airport__c records matching HKG and attaches them to a lookup field. I'm trying to add an error in case the IATA code (HKG) is not found, but it doesn't seem to be working. Am I putting it in the wrong place? Do I just make a if lookup__c is null adderror? Thank you very much for any assistance! 

 

trigger ABInboundAirportMapping on Airline_Booking__c (before insert,before update) 
{
    Set<String> airportNames = new Set<String>();
       for(Airline_Booking__c AB: trigger.new){
                 AirportNames.add(AB.Inbound_Airport__c);
       }
     List<Airport__c> airports = [SELECT Id, Name FROM  Airport__c WHERE Name IN : airportNames ];


      for (Airline_Booking__c AB : Trigger.new) {
       for( Airport__c ar : airports ){
                 if(ar.Name == AB.Inbound_Airport__c){
                             AB.Inbound_Airport_Lookup__c = ar.Id;
                 }
                 else { AB.addError('Unable to find inbound airport with that IATA code.'); } 
        }
    }

}
Shiraz HodaShiraz Hoda

Hi Ryan,

Try below code.

trigger ABInboundAirportMapping on Airline_Booking__c (before insert,before update) 
{
    Set<String> airportNames = new Set<String>();
       for(Airline_Booking__c AB: trigger.new){
                 AirportNames.add(AB.Inbound_Airport__c);
       }
     List<Airport__c> airports = [SELECT Id, Name FROM  Airport__c WHERE Name IN : airportNames ];


      for (Airline_Booking__c AB : Trigger.new) {
       for( Airport__c ar : airports ){
                 if(ar.Name.toLowercase() == AB.Inbound_Airport__c.toLowercase()){
                             AB.Inbound_Airport_Lookup__c = ar.Id;
                 }
                 
        }
        if(AB.Inbound_Airport_Lookup__c == null){
         AB.addError('Unable to find inbound airport with that IATA code.'); 
         } 
        
    }

}