Ruby on Rails ActiveRecord Validations Validates inclusion of an attribute
Example
You can check if a value is included in an array using the inclusion: helper. The :in option and its alias, :within show the set of acceptable values.
class Country < ApplicationRecord
validates :continent, inclusion: { in: %w(Africa Antartica Asia Australia
Europe North America South America) }
end
To check if a value is not included in an array, use the exclusion: helper
class User < ApplicationRecord
validates :name, exclusion: { in: %w(admin administrator owner) }
end
