Ruby on Rails - validates inclusion of an attribute in ruby on rails- ruby on rails tutorial - rails guides - rails tutorial - ruby rails
Example
- We 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) }
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- To check if a value is not included in an array.
- Using the exclusion:.
class User < ApplicationRecord
validates :name, exclusion: { in: %w(admin administrator owner) }
end