From 2bbfaf0c9f6ad23cb2c64a917848ca180917ebe2 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sun, 23 Jul 2017 16:58:09 -0500
Subject: Demonstrate preloading in example

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index c1bfe12b77..8f340d7013 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,11 @@ class MessagesController < ApplicationController
     message.images.attach(params[:message][:images])
     redirect_to message
   end
+
+  def show
+    # Use the built-in with_attached_images scope to avoid N+1
+    @message = Message.find(params[:id]).with_attached_images
+  end
 end
 ```
 
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