Agile Web Development with Rails 7: XML Serializer appears without mention (page 199)


On Page 199, a require statement is added to orders model but not explained nor marked as a new addition. I believe this is due to the Playtime exercise on Page 183.

This is not uncommon - it is hoped that people will do the exercises. I only call it out when the differences make a material difference (for example: price when combining line items).