save_with_errors.rb

module SaveWithErrors
  def self.prepended(base)
    base.serialize :record_errors, Hash
    base.after_validation :assign_errors
  end

  def save(*args)
    super(*args) || save_anyway
  end

  def save!(*args)
    super(*args)
  rescue ActiveRecord::RecordInvalid
    save_anyway
    raise
  end

  private

  def assign_errors
    self.record_errors = errors.messages
  end

  def save_anyway
    save(validate: false)
    false
  end
end