在django中创建新对象时，‘唯一约束失败: main_chatroom.admin_id’

Question

只有当我用相同的管理员创建新聊天室时才会发生这是我在models.py中写的

class ChatRoom(models.Model):
    id = models.UUIDField(primary_key=True, unique=True,
                          default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=100, null=False, blank=True)

    users = models.ManyToManyField(User, through='Membership')
    admin = models.ForeignKey(
        User, null=False, blank=False, on_delete=models.CASCADE, related_name='admin')
    date_created = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.name


class Membership(models.Model):
    id = models.UUIDField(primary_key=True, unique=True,
                          default=uuid.uuid4, editable=False)
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    chatroom = models.ForeignKey(ChatRoom, on_delete=models.CASCADE)
    date_joined = models.DateTimeField(auto_now=True, null=False, blank=False)

    def __str__(self):
        return self.user

    class Meta:
        unique_together = [['user', 'chatroom']]

当我在shell中写下这段代码时：

from .main.models import ChatRoom,Membership
from django.contrib.auth.models import User         
user  = User.objects.get(username = 'someone')
chatroom = ChatRoom(admin = user, name = 'something')
chatroom.save()
chatroom2 = ChatRoom(admin = user, name = 'somethingElse')
chatroom2.save()

在我保存chatroom2后，我得到了这个错误：django.db.utils.IntegrityError: UNIQUE constraint failed: main_chatroom.admin_id，有人能帮我吗？

Answer 1

所以事实证明，我做了一些事情，使得所有迁移都不会对数据库产生任何影响，所以我创建了新项目，并将所有代码复制到新项目中(是的，我知道这不是正确的方法，但对我来说这是最简单的方法)，现在一切都很好用