old_contents: from django.db import models
  
  # Create your models here.
  
new_contents: from django.db import models
  
  class Spot(models.Model):
      name = models.CharField(max_length=200)
      created_at = models.DateTimeField(auto_now_add=True)
      updated_at = models.DateTimeField(auto_now=True)
  
  class Move(models.Model):
      user = models.CharField(max_length=50)
      spot = models.ForeignKey(Spot)
      created_at = models.DateTimeField(auto_now_add=True)
      updated_at = models.DateTimeField(auto_now=True)
  
subject: add models