Question

我的模型有一个带有AutoField（整数）的默认pk，但后来发现我需要使用BigAutoField代替！此外我还有其他模型参考学生模型的数据::如何将pk字段更改为BigAutoField并反映其他参考模型

class Student(models.Model):
    matric_no = models.CharField(max_length=20,  unique=True)  # first set it to U(random)
    password = models.CharField(max_length=128)
    session = models.ForeignKey(Session, null=True)
    programme = models.ForeignKey(Programme, null=True)
    school = models.ForeignKey(School, null=True)
    course_comb = models.ForeignKey(CourseComb, null=True)
    serial = models.IntegerField(null=True)
    current_level = models.CharField(max_length=3, choices=LEVEL_CHOICES, default='100', null=True)
    last_login = models.DateField(null=True)
    is_active = models.CharField(max_length=1, default=1, choices=((1, 1), (0, 0)))
    created_at = models.DateTimeField(default=timezone.now)
    updated_at = models.DateTimeField(auto_now=True)

引用学生的模型

class Profile(models.Model):

    student = models.OneToOneField(Student, on_delete=models.CASCADE)
    attachment = models.ImageField(null=True, blank=True, verbose_name="Profile Image")
    surname = models.CharField(max_length=255, null=True, verbose_name="Surname")
    othernames = models.CharField(max_length=255, null=True, verbose_name="Othernames")
    SEX_CHOICES = (
      ("M", "Male"),
      ("F", "Female")
    )

Answer 1

在字段定义中设置primary_key=True：

id = models.BigAutoField(primary_key=True)

如果你想在多个模型中使用它，你也可以制作一个抽象模型，让别人继承它：

class BigPkAbastract(models.Model):
    id = models.BigAutoField(primary_key=True)

    class Meta:
        abstract = True

在你的其他模特中：

class SomeModel(BigPkAbastract):
    <your model here>

使用AutoField将django默认pk更改为BigAutoField

1 个答案: