Profile作用：User内置的字段不够完善，导致创建的用户信息单一，Profile就是为了对User进行扩展，即丰富用户信息
- 在models中创建Profile类，添加字段user与User形成OneToOne关系以及级联删除
on_delete=models.CASCADE
- 引入与信号相关的包
from django.dispatch import receiver
from django.db.models.signals import post_save
- 装饰器装饰函数，User创建时信号触发自动创建Profile的user字段并关联；User保存时信号触发，Profile自动保存
- 源码
from django.db import models
from django.contrib.auth.models import User
#信号
from django.db.models.signals import post_save,post_init
from django.dispatch import receiver class Profile(models.Model):
user = models.OneToOneField(User,on_delete=models.CASCADE)
birth = models.DateField(null=True,blank=True) def __str__(self):
return self.user.username class Meta:
db_table = 'profile' @receiver(post_save,sender=User)
def create_user_profile(sender,instance,created,**kwargs):
print('创建User')
if created:
Profile.objects.create(user=instance) @receiver(post_save,sender=User)
def save_user_profile(sender,instance,**kwargs):
print('保存User')
instance.profile.save()
