Django--model模型绑定_数据库操作

1、创建model类

app01/models.py
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from django.db import models
 
# Create your models here.
class UserInfo(models.Model):  #创建model类，必须继承自models.Model类
    # 设计表结构和字段，最大长度,默认表名app01_userinfo
    email = models.CharField(max_length=16)
    pwd = models.CharField(max_length=20)


2、注册app

settings.py
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INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app01',
]


3、执行命令创建表

cmd> python manage.py makemigrations       生成源信息，一个字典，位置：app01/migrations/0001_initial.py

cmd> python manage.py migrate     读取生成的源信息，去生成数据库表


4、查看

4.1、用navicat-SQLite工具查看


4.2、用程序查看
app01/admin.py
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from app01 import models
admin.site.register(models.UserInfo)     #把UserInfo创建的表注册进admin页面

浏览器访问http://127.0.0.1:8000/admin/


点进去后就可以添加用户



5、现在有一个用户user1，登录成功后跳转到index页面,列出数据库表里的所有用户信息。

app01/views.py
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from django.shortcuts import render
from django.shortcuts import redirect
def login(request):
    if request.method == 'POST':
        input_email = request.POST['email']
        input_pwd = request.POST['pwd']
        if input_email == 'user1@qq.com' and input_pwd == '123':
            return redirect("/index/")      #登录成功后跳转到index页面
        else:
            return render(request,"login.html",{"status":"用户名密码错误"})
    return render(request,'login.html')
 
def index(request):
    #从数据库中获取数据，并和html渲染
    from app01 import models
    #获取表中所有数据
    user_info_list = models.UserInfo.objects.all()
    return render(request,'index.html',{"user_info_list":user_info_list,})
urls.py
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from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^login/', views.login),
    url(r'^index/', views.index),
]
templates/index.html
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <div>
        <table>
            <thead>
                <tr>
                    <th>邮箱</th>
                    <th>密码</th>
                </tr>
            </thead>
            <tbody>
                {% for line in user_info_list %}
                    <tr>
                        <td>{{ line.email }}</td>
                        <td>{{ line.pwd }}</td>
                    </tr>
                {% endfor %}
            </tbody>
        </table>
    </div>
</body>
</html>

浏览器访问 http://127.0.0.1:8000/login/


登录成功后跳转到 http://127.0.0.1:8000/index/，列出所有的刚才手动在页面创建的用户。



6、model添加数据

index.html
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<form action="/index/" method="post">
    <input type="text" name="em" />
    <input type="text" name="pw" />
    <input type="submit" value="添加" />
</form>
views.py
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def index(request):
    #从数据库中获取数据，并和html渲染
    from app01 import models
    #添加数据
    if request.method=='POST':
        input_em = request.POST['em']
        input_pw = request.POST['pw']
        models.UserInfo.objects.create(email=input_em,pwd=input_pw)
    #获取表中所有数据
    user_info_list = models.UserInfo.objects.all()
    return render(request,'index.html',{"user_info_list":user_info_list,})


7、model删除数据

index.html
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<form action="/index/" method="post">
    <input type="text" name="email_del">
    <input type="text" name="pwd_del">
    <input type="submit" value="删除">
</form>
views.py​
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def index(request):
    from app01 import models
    #删除数据
    if request.method=='POST':
        input_email = request.POST['email_del']
        models.UserInfo.objects.filter(email=input_email).delete()


8、model更新数据

index.html
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<form action="/index/" method="post">
    <input type="text" name="email_update">
    <input type="text" name="pwd_update">
    <input type="submit" value="更新">
</form>
views.py
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def index(request):
    #更新数据
    if request.method=='POST':
        input_em = request.POST['email_update']
        input_pw = request.POST['pwd_update']
        models.UserInfo.objects.filter(email=input_em).update(pwd=input_pw)


9、页面验证：
























posted @ 2016-03-10 18:02  大亮头  阅读(861)  评论(0)    收藏  举报