Question
What makes a field eligible for a constraint in SFDC Campaign triggers and campaigns?
I am trying to add a standard Campaign field, Campaign Type, as an Add Constraint to either an SFDC Trigger, ex "Added to SFDC Campaign" or an SFDC filter, ex. "Member of SFDC Campaign", but I don't know what makes a Campaign field eligible to be a constraint. Ultimately, I would like to filter out Campaigns of a specific Campaign Type (Standard SFDC Campaign object field)
Please advise. Thanks so much.