Further reading
• https://codeclimate.com/blog/7-ways-to-decompose-fat-
activerecord-models/
• Patterns of Enterprise Application Architecture (Fowler)
• Domain Driven Design (Evans)
• All the Little Things (Metz) https://www.youtube.com/
watch?v=8bZh5LMaSmE
• Ruby Object Mapper https://rom-rb.org/