Ruby On Rails Enum

Ruby on Rails enum: learn how to use this powerful tool to define constants and custom logic, with an example.

What is Ruby on Rails Enum?

Ruby on Rails Enum is a type of data structure used in the Ruby programming language. It provides a way to store multiple values in a single variable. Enums are used to store a list of possible values, and they are typically implemented as a class. Each value in the list is given a unique name, and the list of values can be accessed through a method.

An example of a Ruby on Rails Enum is a list of user roles. The roles might be described as "admin", "user", or "guest". The Enum might look something like this:

class UserRoles
  ADMIN = 'admin'
  USER = 'user'
  GUEST = 'guest'

  def self.all
    [ADMIN, USER, GUEST]
  end
end

This Enum defines three different user roles: admin, user, and guest. The Enum also has a method, all, which can be used to get a list of all the possible roles. This method can be used in other parts of the application, such as when checking the user's role when performing a certain action.

Enums are useful for providing a list of values that can be used in the application. They can also be used to check if a value is valid, and they can help keep code clean and maintainable. In Ruby, Enums are typically implemented as a class, and the list of values can be accessed through a method.