Question
When do you use a before vs. After trigger?
Answers
95% of triggers are before triggers – so if you’re unsure, go with before!
You may be wondering why so many triggers are before triggers. There’s a good reason – they’re simpler to use. If you need to make any changes to a record entering your after trigger, you have to do a DML statement. This isn’t necessary in a before trigger – changes to records entering your trigger always save!
The specific use case of an after trigger is when you need to associate any record to a record being created in your trigger. Here’s an example:
// Automatically create an Opp when an Account is createdtrigger AutoOpp on Account(after insert) {  List newOpps = new List();  for (Account acc : Trigger.new) {    Opportunity opp = new Opportunity();    opp.Name        = acc.Name + ' Opportunity';    opp.StageName   = 'Prospecting';    opp.CloseDate   = Date.today() + 90;    opp.AccountId   = acc.Id; // Use the trigger record's ID    newOpps.add(opp);  }  insert newOpps;}   Your Comment




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