app/models/field_test/membership.rb in field_test-0.2.4 vs app/models/field_test/membership.rb in field_test-0.3.0

@@ -2,10 +2,11 @@
   class Membership < ActiveRecord::Base
     self.table_name = "field_test_memberships"
 
     has_many :events, class_name: "FieldTest::Event"
 
-    validates :participant, presence: true
+    validates :participant, presence: true, if: -> { FieldTest.legacy_participants }
+    validates :participant_id, presence: true, if: -> { !FieldTest.legacy_participants }
     validates :experiment, presence: true
     validates :variant, presence: true
   end
 end