Django 报错User.DoesNotExist: User matching query does not exist.解...

models.py — 定义数据表 from django.db import models # Create your models here. class User(models.Model): username = models.CharField(max_length=20, primary_key=True) password = models.CharField(max_length=20) # 修改在 admin 管理工具中的默认名，返回文章标题 def __str__(self): return self.username 以上