What is the best approach to check if a lookup field is null in apex?
rec.lookupField__c == null; // OR rec.lookupField__c == ''; // OR String.isBlank(rec.lookupField__c ) // ?
I apologize if this is the same as How to check in Apex if a Text field is blank. I posted this anyway because I need confirmation on the approach specifically for a lookup field. The linked question talks only about text field. I am not sure if it is completely safe to consider a lookup field as a text field in this scenario.