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  • Python

    查询数据(查询管理员):

    app01/models.py 中定义的类,也就是创建的表

    from django.db import models
    
    
    # 类必须继承 models.Model
    class Admin(models.Model):
        # 创建一个主键自增的字段
        id = models.AutoField(primary_key=True)  # AutoField 为自增的字段
        # 创建一个 varchar 类型的不能为空的字段
        # varchar 类型需要指定最大长度
        username = models.CharField(null=False, max_length=20)
        password = models.CharField(null=False, max_length=20)
    

    admin 表中的数据

    在 app01/views.py 中写上获取数据的函数

    from django.shortcuts import render
    from app01 import models
    
    
    def admin_list(request):
        admins = models.Admin.objects.all()  # 获取所有数据
        print(admins[0].id, admins[0].username, admins[0].password)
        return render(request, "admin_list.html", {"admin_list": admins})
    

    然后在 mysite/urls.py 中写上对应关系

    # -*- coding:utf-8 -*-
    __author__ = "MuT6 Sch01aR"
    
    from django.conf.urls import url
    from django.shortcuts import HttpResponse, render, redirect
    from app01 import views  # 从 app01 中导入函数
    
    
    # 保存路径和函数的对应关系
    urlpatterns = [
        url(r'^admin_list/', views.admin_list)
    ]
    

    admin_list.html:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>管理员列表</title>
    </head>
    <body>
    
    <table border="1">
        <thead>
        <tr>
            <th>id</th>
            <th>用户名</th>
            <th>密码</th>
        </tr>
        </thead>
        <tbody>
    
        {% for user in admin_list %}
            <tr>
            <td>{{ user.id }}</td>
            <td>{{ user.username }}</td>
            <td>{{ user.password }}</td>
            </tr>
        {% endfor %}
    
        </tbody>
    </table>
    </body>
    </html>
    

    这里用到了 for 循环来读取数据

    {% for user in admin_list %}
        <tr>
        <td>{{ user.id }}</td>
        <td>{{ user.username }}</td>
        <td>{{ user.password }}</td>
        </tr>
    {% endfor %}
    

    运行结果

    添加数据(添加管理员):

    在 admin_list.html 中增加一个添加管理员的选项

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>管理员列表</title>
    </head>
    <body>
    
    <table border="1">
        <thead>
        <tr>
            <th>id</th>
            <th>用户名</th>
            <th>密码</th>
        </tr>
        </thead>
        <tbody>
    
        {% for user in admin_list %}
            <tr>
            <td>{{ user.id }}</td>
            <td>{{ user.username }}</td>
            <td>{{ user.password }}</td>
            </tr>
        {% endfor %}
    
        </tbody>
    </table>
    
    <a href="/add_admin/">添加管理员</a>
    
    </body>
    </html>
    

    点击后会跳转到 /add_admin/ 进行相关的操作

    add_admin.html:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>添加管理员</title>
    </head>
    <body>
    
    <form action="/add_admin/" method="post">
        <p>用户名:
            <input type="text" name="username">
        </p>
        
        <p>密码:
            <input type="text" name="password">
        </p>
        
        <p>
            <input type="submit" value="提交">
        </p>
    </form>
    
    </body>
    </html>
    

    app01/views.py 下的代码

    from django.shortcuts import render, redirect
    from app01 import models
    
    
    def admin_list(request):
        admins = models.Admin.objects.all()  # 获取所有数据
        print(admins[0].id, admins[0].username, admins[0].password)
        return render(request, "admin_list.html", {"admin_list": admins})
    
    
    def add_admin(request):
        if request.method == "POST":
            user = request.POST.get("username", None)
            pwd = request.POST.get("password", None)
            # 去数据库中新增一条数据
            models.Admin.objects.create(username=user, password=pwd)
            # 添加成功后跳转
            return redirect("/admin_list/")
    
        return render(request, "add_admin.html")
    

    在 mysite/urls.py 中添加对应关系

    # -*- coding:utf-8 -*-
    __author__ = "MuT6 Sch01aR"
    
    from django.conf.urls import url
    from django.contrib import admin
    from django.shortcuts import HttpResponse, render, redirect
    from app01 import views
    
    
    # 保存路径和函数的对应关系
    urlpatterns = [
        url(r'^admin_list/', views.admin_list),
        url(r'^add_admin/', views.add_admin)
    ]
    

    运行结果:

    点击“添加管理员”

    输入用户名和密码,点击“提交”

    管理员添加成功

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  • 原文地址:https://www.cnblogs.com/sch01ar/p/10666836.html
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