How do I validate members of an array field?

Question

I have this model:

class Campaign

  include Mongoid::Document
  include Mongoid::Timestamps

  field :name, :type => String
  field :subdomain, :type =&g         


        

Answer 1

Found myself trying to solve this problem just now. I've modified Tim O's answer slightly to come up with the following, which provides cleaner output and more information to the errors object that you can then display to the user in the view.

validate :validate_emails

def validate_emails
  emails.each do |email|
    unless email.match(/^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i)
      errors.add(:emails, "#{email} is not a valid email address.")
    end
  end
end