Salesforce Apex Triggers 101

Responses

1. 

   Navya Sree February 16, 2024

   Hello Luke,

   I was trying to write a trigger that restricts if there exists a contact on Account, below is the code. This is giving me System.FinalException: SObject row does not allow errors.

   trigger AccountTrigger2 on Account (after insert, before delete) {
   if(trigger.isBefore && trigger.isDelete){
   List queryAccount = new List([SELECT Id, (SELECT id, Name FROM Contacts) FROM Account WHERE id IN : trigger.old]);
   System.debug(‘## queryAccount’ +queryAccount);
   for(Account deleteAccount : queryAccount){
   if(!deleteAccount.Contacts.isEmpty()){
   deleteAccount.addError(‘Accounts with Opportunities cannot be deleted’);
   }
   }
   }
   }

   Can you please help me here??

   1. 

      Luke February 22, 2024

      Hey Navya,

      addError can be used on the records from Trigger.old or Trigger.New. addError can’t be used on records that were queried. The for loop is iterating on the records that were queried and stored in the queryAccount List.

      Hint: The queried records can be put into a Map and then used in a for loop later….