How do i specify and validate an enum in rails?

Question

I currently have a model Attend that will have a status column, and this status column will only have a few values for it. STATUS_OPTIONS = {:yes, :no, :maybe}

1)

Answer 1

This is how I implement in my Rails 4 project.

class Attend < ActiveRecord::Base
    enum size: [:yes, :no, :maybe]
    validates :size, inclusion: { in: Attend.sizes.keys }
end

Attend.sizes gives you the mapping.

Attend.sizes # {"yes" => 0, "no" => 1, "maybe" => 2}

See more in Rails doc