Detect when a record is being cloned in trigger
Is there a way to detect that a record being inserted is the result of a clone operation in a trigger?
As part of a managed package, I'd like to clear out some of the custom fields when Opportunity and OpportunityLineItem records are cloned.
Or is a trigger not the correct place to prevent certain fields being cloned?
I had considered creating dedicated code to invoke sObject.Clone() and excluding the fields that aren't required. This doesn't seem like an ideal solution for a managed package as it would also exclude any other custom fields on Opportunity.
Answer
In the Winter '16 release, Apex has two new methods that let you detect if a record is being cloned and from what source record id. You can use this in your triggers.
isClone()- Returns true if an entity is cloned from something, even if the entity hasn’t been saved.getCloneSourceId()- Returns the ID of the entity from which an object was cloned.