首先在models页面中创建表
其中一个学生表一个老师表
学生表关联老师表
from django.db import models class Teacher(models.Model): name = models.CharField(max_length=20,verbose_name=‘姓名‘) username = models.CharField(max_length=20,verbose_name=‘登录名‘) password = models.CharField(max_length=20,verbose_name=‘密码‘) class Student(models.Model): name = models.CharField(max_length=20,verbose_name=‘学生姓名‘) age = models.IntegerField(verbose_name=‘年龄‘) teacher = models.ForeignKey(Teacher,on_delete=models.SET_NULL,null=True,blank=True) # Create your models here.
views.py页面
注释为解释
from django.shortcuts import render,HttpResponse,redirectfrom . import models
def login(request): #登录页面 if request.method == ‘GET‘: return render(request, ‘login.html‘) if request.method == ‘POST‘: username = request.POST.get(‘username‘) #输入账号 password = request.POST.get(‘password‘) #输入密码 user_obj = models.Teacher.objects.filter(username=username,password=password).first()#数据库匹配 if user_obj: #判断是否有对应账户和密码是否匹配 request.session[‘user_id‘]=user_obj.id #存session return redirect(‘/show/‘) #返回 else: #如果账户和密码不匹配 return HttpResponse(‘用户名或密码错误‘)
def register(request): #注册 if request.method == ‘GET‘: return render(request,‘register.html‘) if request.method == ‘POST‘: name = request.POST.get(‘name‘) #输入名称 username = request.POST.get(‘username‘) #输入登录名 password = request.POST.get(‘password‘) #输入登录密码 re_pwd = request.POST.get(‘re_pwd‘) #重复提交密码 if username and password and re_pwd: #判断是否获取到三个值 if password == re_pwd: #如果两次输入密码一致 user_obj = models.Teacher.objects.filter(username=username).first() #查询用户名是否存在 if user_obj: #如果已经存在 return HttpResponse(‘用户已存在‘) else: #如果都没有存在就将输入的存入数据库 models.Teacher.objects.create(name=name,username=username,password=password).save() return redirect(‘/login/‘) #返回 else: #如果两次密码输入不一致 return HttpResponse(‘两次密码不一致‘) else: #如果有空值 return HttpResponse(‘不能有空！‘)
def index(request): #展示所有老师 teacher = models.Teacher.objects.all() #数据库查询
return render(request, ‘index.html‘, locals()) #把变量传到html中
def show(request): #展示学生页 user_id = request.session.get(‘user_id‘) #取session teacher = models.Teacher.objects.all().filter(id=user_id) #通过session查询登录的teacherid context = { ‘teacher‘ : teacher #teacher传到Html } if request.method == ‘POST‘: name = request.POST.get(‘name‘) #获得输入的name age = request.POST.get(‘age‘) #获得输入的age if name and age: #如果获取到了name和age user_id = request.session.get(‘user_id‘) #取session student = models.Student.objects.create(name=name,age=age,teacher_id=user_id) #添加学生的信息和关联的老师 else: return HttpResponse(‘不能有空！‘) return render(request, ‘show.html‘, context)
def student(request): #展示学生 user_id = request.session.get(‘user_id‘) #获取session student = models.Student.objects.all().filter(teacher_id=user_id) #通过session查找到老师关联的学生 context = { ‘student‘ : student #传递到html } return render(request, ‘student.html‘, context)
def del_student(request,id): #删除 models.Student.objects.filter(id=id).update(teacher = None) #通过session查询学生的id然后将主键关联删除 return HttpResponse(‘删除成功‘)
def no_student(request): #没有分的学生 user_id = request.session.get(‘user_id‘) #取session no_student = models.Student.objects.all().filter(teacher_id=None) #查询所有没有主键关联的学生 context = { ‘no_student‘ : no_student #传递到html } return render(request, ‘no_student.html‘, context)
def add_class(request,id): #添加班级 user_id = request.session.get(‘user_id‘) #取session models.Student.objects.filter(id=id).update(teacher_id = user_id) #将没有关联的学生关联到老师 return HttpResponse(‘添加成功‘)# Create your views here.
html页面1. index页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>首页展示</title></head><body>
{% for i in teacher %}{# 循环#}
{{ i.name }}{# 取姓名#}
{% endfor %}
</body></html>2.login页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>login</title></head><body><h1>登陆界面</h1>{#最简单的html代码#}{#这里要提醒下，提交到后台的get，post方式都可以，但是作为账户数据的话，用post#}<form action="/login/" method="post">{# form表单#} {% csrf_token %} 用户名：<input type="text" name="username"><br> 密码：<input type="password" name="password"><br> <input type="submit" value="登陆"></form></body></html>3.no_student页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body>还未分班的学生有：<table> <tr> <td>学生</td> <td>操作</td> </tr> <tr> {% for x in no_student %} <td>{{ x.name }}</td> <td><a href="/add/{{ x.id }}">加入班级</a></td>{# 切记前面加/#} {% endfor %} </tr></table></body></html>4.register页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>register</title></head><body> <h1>注册界面</h1> <form action="" method="post"> {% csrf_token %} 姓名：<input type="text" name="name"><br> 用户名：<input type="text" name="username"><br> 密码：<input type="password" name="password"><br> 确认密码：<input type="password" name="re_pwd"><br> <input type="submit" value="注册"> </form></body></html>5.show页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>首页展示</title></head><body>
{% for i in teacher %}
欢迎你, {{ i.name }}
{% endfor %}
<form method="post"> {% csrf_token %} 学生姓名:<input type="text" name="name"><br> 年 龄:<input type="text" name="age"><br> <button type="submit">提交</button></form><a href="/student/">点击查看您班级的学生</a><a href="/no_student/">点击查看未分班的学生</a>
</body></html>6.student页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body>您的学生有：
<table> <tr> <td>姓名</td> <td>操作</td> </tr>{% for x in student %} <tr>
<td>{{ x.name }}</td> <td><a href="/del/{{ x.id }}/">删除</a></td> </tr>{% endfor %} </table>
</body></html>
此练习为本人在某大某鸟的练习记录 如有不足望指正与理解
原文地址：https://www.cnblogs.com/derrickwilliams/p/10894834.html
时间： 2024-12-26 07:56:20