Question

Currently I have a function to check if the birthyear is correct:

  validates :birth_year, presence: true,
            format: {with: /(19|20)\d{2}/i }

I also have a function that checks if the date is correct:

  validate :birth_year_format

  private

  def birth_year_format
    errors.add(:birth_year, "should be a four-digit year") unless (1900..Date.today.year).include?(birth_year.to_i)
  end

Is it possible to combine the bottom method into the validates at the top instead of the two validates I have now?

Answer 1

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