text: 
  class Comment{
      constructor(
          {id,adder,url,password,author,date,to_user,contents}
      ){
          this.id=id
          this.url=url
          this.adder=adder?true:false
          this.password=password
          this.author=author
          this.date=date
          this.to_user=to_user
          this.contents=contents
      }
  }
  