reader

# File activerecord/lib/active_record/associations/collection_association.rb, line 29
      def reader(force_reload = false)
        if force_reload
          ActiveSupport::Deprecation.warn(            Passing an argument to force an association to reload is now            deprecated and will be removed in Rails 5.1. Please call `reload`            on the result collection proxy instead..squish)

          klass.uncached { reload }
        elsif stale_target?
          reload
        end

        if null_scope?
          # Cache the proxy separately before the owner has an id
          # or else a post-save proxy will still lack the id
          @null_proxy ||= CollectionProxy.create(klass, self)
        else
          @proxy ||= CollectionProxy.create(klass, self)
        end
      end