$ tree app/ -d -L 1 app ├── callbacks ├── controllers ├── decorators ├── exceptions ├── factories ├── models ├── policies ├── services ├── tasks ├── utils ├── validators ├── values └── views クラス設計 Callback クラス名の命名規則として、接尾辞にCallbackを付与します。 ActiveRecordのコールバック処理をまとめます。 after_find after_initialize before_validation after_validation before_save before_create / before_update after_create / after_update
![中/大規模開発のためのRails設計パターン - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/03a8ae3f98131cf135aa48eda2e3b525319aedcb/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Fadvent-calendar-ogp-background-7940cd1c8db80a7ec40711d90f43539e.jpg%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9JUU0JUI4JUFEJUVGJUJDJThGJUU1JUE0JUE3JUU4JUE2JThGJUU2JUE4JUExJUU5JTk2JThCJUU3JTk5JUJBJUUzJTgxJUFFJUUzJTgxJTlGJUUzJTgyJTgxJUUzJTgxJUFFUmFpbHMlRTglQTglQUQlRTglQTglODglRTMlODMlOTElRTMlODIlQkYlRTMlODMlQkMlRTMlODMlQjMmdHh0LWFsaWduPWxlZnQlMkN0b3AmdHh0LWNvbG9yPSUyMzNBM0MzQyZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT01NiZzPTVkNmE3MWVkOWI1ZDc3MDQxNDQ2YjJkMTE2OTg2Yjk5%26mark-x%3D120%26mark-y%3D96%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9OTcyJnR4dD0lNDBrdHN1amljaGFuJnR4dC1jb2xvcj0lMjMzQTNDM0MmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz0wYTM1NDZkYjIyY2FlMzIyOGY3ZTg0ODdiOWIzMDBhNQ%26blend-x%3D120%26blend-y%3D500%26blend-mode%3Dnormal%26s%3D92518cc784d32749e89a7817e077f8a0)