has_fields plugin

has_fields.rb

module HasFields
  def has_any?(*fields)
    fields.each { |f| return true unless self.send(f).blank? }
    false
  end

  def has_all?(*fields)
    fields.each { |f| return false if self.send(f).blank? }
    true
  end
end

init.rb

ActiveRecord::Base.send!(:include, HasFields)