What is the BEFORE INSERT or upsert listexception?
“System.ListException: Before Insert or Upsert list must not have two identically equal elements” Know someone who can answer? Share a link to this question via email, Twitter, or Facebook.
Can you insert two opportunitylineitems that are the same?
This makes absolutely no sense to me. I am trying to insert two OpportunityLineItems that are exactly the same but I get this exception. What good reason is there to stop the insertion of two Records that are the same?
When do you need to use set instead of list?
This exception occurs when you are trying to insert or upsert a list which is having two or more identical records. In this case we have to use set instead of list. So, that it will be overwritten because list can contain duplicates but set cannot contain duplicates. Check this to know more about List, Set, Map.
Are there two records in the list that are the same?
So really it was not two records that were the same but one record in the List twice. Here is the nitty gritty. Sigh…..I wasted too much time trying to figure this out :smileysad:. Gah! Figure it out. I had to redo some of my code and I added a loop to the code and then forgot to put my opp initiation statement in the loop.
What happens if I add more than one item to a list?
If you end up adding more than one item to the list, you’ll end up with this error. Instead, initialize the history object inside the for loop:
Are there duplicate entries in the for loop?
For a single record, no duplicate entries should be there. It should be defined inside the loop, where you are using competitor variable. It will add unique records to the competitorlist list. Also you have not been following the best practices. SOQL inside for loop is not a good practice.