old_contents: from . import db
  
  
  class Essay(db.Model):
      __tablename__ = 'essays'
      id = db.Column(db.Integer, primary_key=True)
      text = db.Column(db.Text)
      time = db.Column(db.DateTime(True))
      score = db.Column(db.Float)
      spell_errors = db.Column(db.Text)
      grammar_errors = db.Column(db.Text)
      coherence = db.Column(db.Text)
  
      def __repr__(self):
          return '<Essay {0}>: {1}. Created at:{2}'.format(self.text, self.score,
                                                           self.time)
  
new_contents: from . import db
  
  
  class Essay(db.Model):
      __tablename__ = 'essays'
      id = db.Column(db.Integer, primary_key=True)
      text = db.Column(db.Text)
      time = db.Column(db.DateTime(True))
      score = db.Column(db.Float)
      spell_errors = db.Column(db.Text)
      grammar_errors = db.Column(db.Text)
      coherence = db.Column(db.Text)
  
      def __repr__(self):
          return u'<Essay {0}>: {1}. Created at:{2}'.format(self.id, self.score,
                                                           self.time)
  
subject: Modify repr of model Essay