小编ton*_*ola的帖子

当我在Sinatra尝试这样做时,

class Comment
    include DataMapper::Resource
    property :id,           Serial
    property :body,         Text
    property :created_at, DateTime
end

get '/show' do
  comment = Comment.all
  @comment.each do |comment|
    "#{comment.body}"
  end
end

它返回此错误,

ERROR: undefined method `bytesize' for #<Comment:0x13a2248>

有人能指出我正确的方向吗？

谢谢,