python - Django 完整性错误

Question

我突然遇到完整性错误:“关键‘用户名’的条目‘qw’重复 从这个模型。第1062章

from django.template.defaultfilters import slugify
from django.contrib.auth.models import User

class Customer(User):
 slug=models.SlugField(unique=True)
 description=models.TextField(null=True)
 phone=models.IntegerField(null=True)
 id_verified=models.NullBooleanField()
 picture=models.ImageField(upload_to='media/customer', null=True)
 isWorker=models.BooleanField()

 def save(self,*args,**kwargs):                                         
    self.slug=slugify(self.username)                                   
    super(Customer,self).save(*args, **kwargs)                            
 def __unicode__(self):
    return self.username

这里出了什么问题？

Answer 1

来自文档，关于指定自定义用户模型:

You must then provide some key implementation details:

USERNAME_FIELD

A string describing the name of the field on the User model that is used as the unique identifier. This will usually be a username of some kind, but it can also be an email address, or any other unique identifier. The field must be unique (i.e., have unique=True set in its definition).

因此用户名似乎是唯一的，至少在您设置自定义用户名字段之前是这样。

阅读文档

https://docs.djangoproject.com/en/dev/topics/auth/customizing/#specifying-a-custom-user-model