`has_many :following, through: :active_relationships, source: :followable, source_type: "Followable"`
I don't think polymorphism in Rails can work that waydid you try`has_many :users_following, through: :active_relationships, source: :followable, source_type: "FollowableUser"`
`has_many :projects_following, through: :active_relationships, source: :followable, source_type: "FollowableProject"`