Salesforce How to update a roll-up summary field on parent table from inside method that gets triggered when child is persisted

Question

I made a Commission object with a commission amount c property that has a master detail relationship with Contact. Total Commission c is a sum up field on Contacts that adds up all commission amounts from Commissions associated to each Contact. I've added a trigger to Commission that calls the updatePrimary function. When I query this inside updatePrimary, I receive the old value in the sumup field(total commission), not the new value with the new commission amount appended. It hasn't come to a conclusion yet. If at all possible, some assistance would be greatly appreciated.

Answer 1

At the save order of execution, you're in the wrong place.

After the triggers are fired in Step 8, the parent object's roll-up summary fields are changed in Step 18.

You'll need to put a trigger on the parent object if you want to react to the update of your roll-up summary field. If I understand your requirement properly, you might be able to create a formula field on the Commission object that references the Contact's roll-up summary field.