Same enum values for multiple columns

Question

I need to do something like this:

class PlanetEdge < ActiveRecord::Base
  enum :first_planet [ :earth, :mars, :jupiter]
  enum :second_planet [ :earth, :mars, :jupiter]
end

Where my table is a table of edges but each vertex is an integer.

However, it seems the abvove is not possible in rails. What might be an alternative to making string columns?

Answer 1

If you're running rails 5.0 or greater as per http://edgeapi.rubyonrails.org/classes/ActiveRecord/Enum.html

You can use the :_prefix or :_suffix options when you need to define multiple enums with same values. If the passed value is true, the methods are prefixed/suffixed with the name of the enum. It is also possible to supply a custom value:

class Conversation < ActiveRecord::Base
    enum status: [:active, :archived], _suffix: true
    enum comments_status: [:active, :inactive], _prefix: :comments
end

With the above example, the bang and predicate methods along with the associated scopes are now prefixed and/or suffixed accordingly:

conversation.active_status!
conversation.archived_status? # => false

conversation.comments_inactive!
conversation.comments_active? # => false