我尝试首先使用OneToOneField关系向用户添加ManyToManyField。这是我的代码:
ENTERPRISE_TYPE_CHOICES = (
('a', "A"),
('b', "B"),
('c', "C"),
)
class Enterprise(models.Model):
et_type = models.CharField(
max_length = 10,
choices=ENTERPRISE_TYPE_CHOICES,
default='a'
)
name = models.TextField(max_length=100)
number = models.TextField(max_length=7)
def __str__(self):
return "%s %s %s" % (self.et_type, self.name, self.number)
class Secretaire(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
workshop = models.ManyToManyField(Enterprise)
@receiver(post_save, sender=User)
def create_user_secretaire(sender, instance, created, **kwargs):
if created:
Secretaire.objects.create(user=instance)
@receiver(post_save, sender=User)
def save_user_secretaire(sender, instance, **kwargs):
instance.profile.save()
然后在python manage.py shell中我尝试:
from django.contrib.auth.models import User
u = User.objects.create(username="a", email="a@a.fr", password="a")
它抛出错误:
ProgrammingError:relation" helpdesk_secretaire"不存在 第1行:插入" helpdesk_secretaire" (" user_id")VALUES(11)RE ...
(用户仍然被创建,但没有人能够访问user.secretaire,它会抛出同样的错误)
您对我收到此错误的原因有任何疑问吗?
答案 0 :(得分:1)
根据对原始问题的评论:您需要先运行makemigrations
和migrate
。您收到的错误消息表明该表在数据库中不存在。