last_chain_scope

# File activerecord/lib/active_record/associations/association_scope.rb, line 61
      def last_chain_scope(scope, table, reflection, owner, association_klass)
        join_keys = reflection.join_keys(association_klass)
        key = join_keys.key
        foreign_key = join_keys.foreign_key

        value = transform_value(owner[foreign_key])
        scope = scope.where(table.name => { key => value })

        if reflection.type
          polymorphic_type = transform_value(owner.class.base_class.name)
          scope = scope.where(table.name => { reflection.type => polymorphic_type })
        end

        scope
      end