I'm trying to create a field validation in the Opportunity module that will throw an error when a user tries to change a commit stage from Upside or Commit back to Funnel. When the error is thrown, I expect the commit stage field to be highlighted and…

Hello. I'm using SugarCRM Enterprise 7.5. I already found a way to validate related fields from the model RevenueLineItems using javascript (backbone.js + underscore.js), and show an error message on the screen. It's being used on the EditView. But I…