gistfile1.txt

class Note
  include ::DataMapper::Resource
  
  property :id, Integer, :serial => true
  property :content, String, :length => 2048
  property :type, Discriminator
  
  validates_length :content, :minimum => 4, :maximum => 2048
  
  before :save do
    self.content = columnize(content)
  end
  
  def columnize buf, opts = {}
    width = 80
    indent = "#{ indent }"
    column = []
    words = buf.split %r/\s+/o
    row = "#{ indent }"
    while((word = words.shift))
      if((row.size + word.size) < (width - 1))
        row << word
      else
        column << row
        row = "#{ indent }"
        row << word
      end
      row << ' ' unless row.size == (width - 1)
    end
    column << row unless row.strip.empty?
    column.join "\n"
  end
end

class SliceNote < Note
  validates_present :slice_id
  validates_present :content
  
  property :slice_id, Integer
  belongs_to :slice
end