In my attempts to use the Approval class methods to unlock locked records or to lock unlocked records, I have encountered the following warning:
System.UnexpectedException: null
I saw this error both when running anonymous apex:
Approval.lock('0019000001dBwi4');
and when using a trigger:
trigger AccountTrigger on Account (after insert, after update) {
Approval.lock(trigger.new,false);
}
Does anyone know what would be causing this error or how I could get around it?
You need to go to
Setup->Create-> Workflows and Approvals -> Process Automation Settings
and set checkbox Enable record locking and unlocking in Apex as true
More information here.
On doing some research on my own I found that Option 1 of my questions should be the way to unlock and lock the records as it will avoid hitting the governor limit. The option 2 will definitely hit the governor limit as it is checking the each record whether it is locked or not and then making it unlock. It consumes 1 DML to unlock or lock a record.
I choose below method to unlock the records.
public static List<Approval.UnlockResult> unlock(List<SObject> recordsToUnlock, Boolean allOrNothing)
Best Answer
I think you need to lock the record
afterinsert or update. Not before. Try changing that to after event.It does not make sense to lock a record before you have inserted it.
EDIT
Tested and works fine on API version 35