principles.md

Rails principles

• Convention over Configuration (Coc)
• Don’t Repeat Yourself (DRY)

SOLID principles

• Single Responsibility Principle (SRP)

  An object should have only a single responsibility.

• Open/Closed Principle (OCP)

  Classes or methods should be open for extension, but closed for modification.

• Liskov Substitution Principle

• Interface Segregation Principle

• Dependency Inversion Principle (DIP)

  • Has to do with ‘high-level’ objects not depending on ‘low-level’ details.
  • This can be achieved with duck typing.
  • ‘high-level’ : think business logic
  • ‘low-level’ : think database querying and IO

Other principles

• Fat model, skinny controller
• KISS - "Keep it simple, stupid"
• Composition over inheritance

Resources:

• https://robots.thoughtbot.com/back-to-basics-solid
• https://en.wikipedia.org/wiki/SOLID