Best way to validate year via Ruby on Rails validates method?
You should be able to do something like this:
validates :birth_year, presence: true, inclusion: { in: 1900..Date.today.year }, format: { with: /(19|20)\d{2}/i, message: "should be a four-digit year" }Take a look at: http://apidock.com/rails/ActiveModel/Validations/ClassMethods/validates
:birth_year, presence: true, format: { with: /(19|20)\d{2}/i } numericality: { only_integer: true, greater_than_or_equal_to: 1900, less_than_or_equal_to: Date.today.year }
regex
/\A(19|20)\d{2}\z/will only only allow numbers between 1900 e 2099
\A - Start of string
\z - End of string