Share enum declaration values with multiple attributes

Question

I want to have a class with several attributes that saves weekdays with numeric values.

summary_weekday    :integer
collection_weekday :integer

Answer 1

In case people are still looking for a solution for Rails 4, I just tried this the other day and it seems to work well. I need a similar system to work because of various checks an admin must do on an object. I solved it by creating a Model Concern and using the class method in the Model:

In models/concerns/review_states.rb

require 'active_support/concern'

module ReviewStates extend ActiveSupport::Concern

  class_methods do
    REVIEW_STATES = {not_initiated:0, in_progress:1, completed:2}
    SIGNUP_STATES = {pending:0, activated:1, disabled:2}
    def prefix_review_states(prefix)
      Hash[REVIEW_STATES.map { |k,v| [k.to_s.prepend(prefix).to_sym, v] }]
    end
  end
end

In your model:

class ModelName < ActiveRecord::Base
  include ReviewStates

  enum one_status: prefix_review_states("one_")
  enum two_status: prefix_review_states("two_")

This seems to make all of the correct database queries.

Good luck!