Context Validations

gistfile1.rb

class Article
  with_options on: :view do |on_view|
    on_view.validate :has_been_published
    on_view.validate :is_not_spam
  end

  def viewable?
    valid? :view
  end

  private

  def has_been_published
    if published_at.future?
      errors.add(:published_at, "is in the future")
    end
  end

  def is_not_spam
    if is_spam?(body)
      errors.add(:body, "has been detected as spam")
    end
  end
end