Then, we can update the after update part on the trigger (some parts of the code have been hidden for simplicity; refer to this book's GitHub repository for the full code):
1. trigger OpportunityTrigger on Opportunity (before insert, before 2. update, after insert, after update) { 3. 4. //current record (supposing only one opportunity can be saved at once) 5. Opportunity currentOpp = Trigger.new[0]; 6. 7. //treating before and after events separately 8. if(Trigger.isBefore){ 9. //. . . hidden for brevity10. }else if(Trigger.isAfter){11. if(Trigger.isUpdate || Trigger.isInsert){12.13. if(currentOpp.AccountId != null) {14. //query current account15. Account acc = [Select Id From Account 16. Where Id = :currentOpp.AccountId]; ...
