How to Allow Duplicate Contacts when Saving on Overridden Contact Edit Page

Question

I am creating a Visualforce page that will override the Contact New and Edit pages.

I know that when a duplicate (based on Email or SSN) Contact is saved from the standard Contact page, the user has an option to Save (Ignore Alert).

How would I be able to duplicate that behavior on my overridden page?

Right now I get this error and haven't found a way to duplicate the behavior of the standard page to allow saving of the 'duplicate':

Answer 1

Create an Apex controller for your page and set DML options for insert:

Database.DMLOptions optionsForInsert = new Database.DMLOptions();
optionsForInsert.DuplicateRuleHeader.AllowSave = true;

List<Database.SaveResult> ans = Database.insert(toInsertList, optionsForInsert);