text: #from app import db
  
  #class User(db.Model):
  #    id = db.Column(db.Integer, primary_key=True)
  #    nickname = db.Column(db.String(64), index=True, unique=True)
  #    email = db.Column(db.String(120), index=True, unique=True)
  
  #    def __repr__(self):
  #        return '<User %r>' % (self.nickname)
  from app import db
  
  class User(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      nickname = db.Column(db.String(64), index=True, unique=True)
      email = db.Column(db.String(120), index=True, unique=True)
      posts = db.relationship('Post', backref='author', lazy='dynamic')
  
      def __repr__(self):
          return '<User %r>' % (self.nickname)
  
  class Post(db.Model):
      id = db.Column(db.Integer, primary_key = True)
      body = db.Column(db.String(140))
      timestamp = db.Column(db.DateTime)
      user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
  
      def __repr__(self):
          return '<Post %r>' % (self.body)