python - django 里创建组合主键(Composite Primary Key)

2018-08-10T06:59:12Z||2018-08-10T06:59:12Z 

# https://thecuriousfrequency.wordpress.com/2014/11/11/make-primary-key-with-two-or-more-field-in-django/
class Student(models.Model):
    Name = models.CharField(max_length=100)
    Roll = models.CharField(max_length=20)
    Department = models.CharField(max_length=15)
 
    class Meta:
        unique_together = (('Roll', 'Department'),)