old_contents: from app import db
  
  
  class Base(db.Model):
  
      __abstract__ = True
  
      id = db.Column(db.Integer, primary_key=True)
      created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
      updated_at = db.Column(db.DateTime, default=db.func.current_timestamp())
  
  
  class Route(Base):
  
      __tablename__ = 'routes'
  
      origin_point = db.Column(db.String(128), nullable=False)
      destination_point = db.Column(db.String(128), nullable=False)
      distance = db.Column(db.Integer, nullable=False)
  
      def __init__(self, origin_point, destination_point, distance):
          self.origin_point = origin_point
          self.destination_point = destination_point
          self.distance = distance
  
      def __repr__(self):
          return '<Route <{0}-{1}-{2]>'.format(self.origin_pint,
                                               self.destination_point,
                                               self.distance)
  
new_contents: from app import db
  
  
  class Base(db.Model):
  
      __abstract__ = True
  
      id = db.Column(db.Integer, primary_key=True)
      created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
      updated_at = db.Column(db.DateTime, default=db.func.current_timestamp())
  
  
  class Route(Base):
  
      __tablename__ = 'routes'
  
      origin_point = db.Column(db.String(128), nullable=False)
      destination_point = db.Column(db.String(128), nullable=False)
      distance = db.Column(db.Integer, nullable=False)
  
      def __repr__(self):
          return '<Route <{0}-{1}-{2]>'.format(self.origin_pint,
                                               self.destination_point,
                                               self.distance)
  
subject: Remove unecessary initialization from Route model