from django.db import models
# Create your models here.
class Classes(models.Model):
  caption = models.CharField(max_length=32)
class Student(models.Model):
  name = models.CharField(max_length=32)
  cls = models.ForeignKey(Classes, on_delete=models.CASCADE)
class Teacher(models.Model):
  name = models.CharField(max_length=32)
  cls = models.ForeignKey(Classes, on_delete=models.CASCADE)
class Administrator(models.Model):
  username = models.CharField(max_length=32)
  password = models.CharField(max_length=32)
修改 urls.py
from django.contrib import admin
from django.urls import path
from app01 import views
urlpatterns = [
  path('admin/', admin.site.urls),
  path('login.html', views.login),
  path('index.html', views.index),
]

# login.html



  
  



  {% csrf_token %}
  

    用户名: 
    
  
  

    密码: 
    
  
  

    
    
    {{ msg }}
  





# index.html



  
  


 Hello {{ username }} 

from django.shortcuts import render, redirect
# Create your views here.
from app01 import models
def login(req):
  # models.Administrator.objects.create(
  #   username='klvchen',
  #   password='klvchen'
  # )
  message = ""
  if req.method == "POST":
    user = req.POST.get('user')
    pwd = req.POST.get('pwd')
    c = models.Administrator.objects.filter(username=user, password=pwd).count()
    if c:
      rep = redirect('index.html')
      rep.set_cookie('username', user)
      return rep
    else:
      message = "用户名或密码错误"
  return render(req, 'login.html', {'msg': message})
def index(req):
  username = req.COOKIES.get('username')
  if username:
    return render(req, 'index.html', {'username': username})
  else:
    return redirect('/login.html')

python manage.py makemigrations
python manage.py migrate