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()