Django——User-Profile

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()