主页 / 问题 / 1281521
Accepted
Innsmouth fisherman
Asked:2022-05-13 20:37:43 +0800 CST2022-05-13 20:37:43 +0800 CST

NOT NULL 约束失败，为什么？

  • 772

当我尝试创建超级用户

python manage.py createsuperuser

我收到以下错误

django.db.utils.IntegrityError: NOT NULL constraint failed: me_teacher.subject_id

我/模特

from django.conf import settings
from django.contrib.auth.models import User, AbstractUser
from django.db import models
import sys
sys.path.append('../')
from wisdom.models import Subject

class Teacher(AbstractUser):
    name = models.CharField(max_length=20)
    surname = models.CharField(max_length=20)
    user = models.OneToOneField(settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE)
    subject = models.ForeignKey(Subject, related_name='teacher_subject',
        on_delete=models.CASCADE)

智慧/模型

from django.db import models

class Subject(models.Model):
    title = models.CharField(max_length=200)
    slug = models.SlugField(max_length=200, unique=True)

    class Meta:
        ordering = ['title']

    def __str__(self):
        return self.title

我的问题是什么？

python

1 个回答

  1. Best Answer

    有必要提供创建用户而不被绑定到主题的能力 ( null=True)

        subject = models.ForeignKey(Subject, related_name='teacher_subject',
        null=True, on_delete=models.CASCADE)
    • 0

相关问题