Django学生管理系统添加学生时，报错Not Found: /POST

最近在学习Django，跟着视频写了一个学生系统，主要是增删改查操作，界面丑的一匹

1.url.py

from django.contrib import admin
from django.urls import path,re_path
from app01.views import classes
from app01.views import teachers
from app01.views import students

urlpatterns = [
    path('admin/', admin.site.urls),
    re_path('get_classes.html$', classes.get_classes),
    re_path('add_classes.html$', classes.add_classes),
    re_path('update_classes.html$', classes.update_classes),
    # re_path('edit_classes.html$', classes.edit_classes),
    re_path('del_classes.html$', classes.del_classes),
    re_path('get_students.html$', students.get_students),
    re_path('add_students.html$', students.add_students),
]

View Code

2.models.py

from django.db import models

# Create your models here.
class Classes(models.Model):
    title = models.CharField(max_length=32)
    m =models.ManyToManyField("Teachers")


class Teachers(models.Model):
    name = models.CharField(max_length=32)


class Students(models.Model):
    username = models.CharField(max_length=32)
    age = models.IntegerField()
    gender = models.BooleanField()
    cs = models.ForeignKey(Classes,on_delete=models.CASCADE,)

View Code

3.get_students.html(获取学生信息)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div>
        <a href="/add_students.html">添加</a>
    </div>
    <div>
        <table border="1">
            <thead>
                <tr>
                    <th>ID</th>
                    <th>姓名</th>
                    <th>性别</th>
                    <th>年龄</th>
                    <th>班级</th>
                    <th>操作</th>
                </tr>
            </thead>
            <tbody>
                {% for row in stu_list %}
                    <tr nid="{{ row.id }}">
                        <td>
                            {{ row.id }}
                        </td>
                        <td>
                            {{ row.username }}
                        </td>
                        <td>
                            {{ row.gender }}
                        </td>
                        <td>
                            {{ row.age }}
                        </td>
                        <td>
                            {{ row.cs.title }}
                        </td>
                        <td>
                            <a href="/del_students.html?nid={{ row.id }}">删除</a>
                            <a href="/edit_students.html?nid={{ row.id }}">编辑</a>
                        </td>
                    </tr>
                {% endfor %}
            </tbody>
        </table>
    </div>
</body>
</html>

View Code

4.add_students.html(添加学生)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h3>添加用户</h3>
<form method="POST" action="/add_students.html">
    {% csrf_token %}
    <p><input type="text" name="username" placeholder="用户名" /></p>
    <p><input type="text" name="age" placeholder="年龄" /></p>
    <p>
        男：<input type="radio" name="gender" value="1" />
        女：<input type="radio" name="gender" value="0" />
{#        name=gender是为了互斥#}
    </p>
    <p>
        <select name="cs">
            {% for row in cs_list %}
                <option value="{{ row.id }}">{{ row.title }}</option>
            {% endfor %}
        </select>
    </p>
    <input type="submit" value="提交">
</form>

</body>
</html>

View Code

导致报错的原因：用户名和年龄的input标签少了一斜杠

Django学生管理系统添加学生时，报错Not Found: /POST

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