experimental DeprecatedConstantToMethodProxy

activesupport/lib/active_support/deprecation.rb

@@ -194,6 +194,23 @@ module ActiveSupport
           ActiveSupport::Deprecation.warn("#{@old_const} is deprecated! Use #{@new_const} instead.", callstack)
         end
     end
+
+    class DeprecatedConstantToMethodProxy < DeprecationProxy #:nodoc:
+      def initialize(old_const, new_target, new_method)
+        @old_const = old_const
+        @new_target = new_target
+        @new_method = new_method
+      end
+
+      private
+        def target
+          @new_target.__send__(@new_method)
+        end
+
+        def warn(callstack, called, args)
+          ActiveSupport::Deprecation.warn("#{@old_const} is deprecated! Use #{@new_target.inspect}.#{@new_method} instead.", callstack)
+        end
+    end
   end
 end