How to validate the date such that it is after today in Rails?

Question

I have an Active Record model that contains attributes: expiry_date. How do I go about validating it such that it is after today(present date at that time)? I am totally new to

Answer 1

Here's the code to set up a custom validator:

#app/validators/not_in_past_validator.rb
class NotInPastValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    if value.blank?
      record.errors.add attribute, (options[:message] || "can't be blank")
    elsif value <= Time.zone.today
      record.errors.add attribute,
                        (options[:message] || "can't be in the past")
    end
  end
end

And in your model:

validates :signed_date, not_in_past: true