preloaders_on

# File activerecord/lib/active_record/associations/preloader.rb, line 105
        def preloaders_on(association, records, scope, polymorphic_parent = false)
          case association
          when Hash
            preloaders_for_hash(association, records, scope, polymorphic_parent)
          when Symbol, String
            preloaders_for_one(association, records, scope, polymorphic_parent)
          else
            raise ArgumentError, "#{association.inspect} was not recognized for preload"
          end
        end