기본 ORM 동작 이해 Article과 Comment 간의 관계가 설정된 모델class Article(models.Model): title = models.CharField(max_length=120) content = models.TextField() created_at = models.DateTimeField(auto_now_add=True) updated_at = models.DateTimeField(auto_now=True)class Comment(models.Model): article = models.ForeignKey( Article, on_delete=models.CASCADE, related_name="comments" ) content ..