lib/rails_erd/domain/relationship.rb in rails-erd-1.4.6 vs lib/rails_erd/domain/relationship.rb in rails-erd-1.4.7

@@ -19,10 +19,10 @@
         end
 
         private
 
         def association_identity(association)
-          identifier = association_identifier(association)
+          identifier = association_identifier(association).to_s
           Set[identifier, association_owner(association), association_target(association)]
         end
 
         def association_identifier(association)
           if association.macro == :has_and_belongs_to_many