django使用signal

常见signal类型

• pre_save 对象save前触发

• post_save 对象save后触发

• pre_delete 对象delete前触发

• post_delete 对象delete后触发

• m2m_changed ManyToManyField 字段更新后触发

用户注册案例的使用

signals.py

from django.contrib.auth import get_user_model
from django.db.models.signals import post_save
from django.dispatch import receiver

User = get_user_model()


@receiver(post_save, sender=User)
def create_user_profile(sender, instance = None, created = False, **kwargs):
    if created:
        password = instance.password
        instance.set_password(password)
        # User.objects.create(user=instance)
        instance.save()

apps.py

from django.apps import AppConfig


class UsersConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'apps.users'
    verbose_name = '用户管理'

    # 注册信号
    def ready(self):
        import apps.users.signals

备注

在用户注册之前,加密了 password, 相当于重写create方法