练习随笔 - django学生管理系统

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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,redirect
from . 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

练习随笔 - django学生管理系统

标签：upd   htm   meta   ssi   add   get   create   size   font   

原文地址：https://www.cnblogs.com/derrickwilliams/p/10894834.html