【django2】模型 django 1.10 + sqlite3

Python版本3.5，django版本1.10

1 新建项目

django-admin.py startproject website1

2 启动服务器，查看是否正常

manage.py runserver

3 进入工程website1一级文件夹下新建app

python manage.py startapp appdemo

4 将新建立的app加入工程中

修改 website1/website1/settings.py的INSTALL_APPS，将app名称加入该元组中。

5 修改website1/urls.py文件

from django.conf.urls import url
from django.contrib import admin
from appdemo import views as appdemo_views

urlpatterns = [
    # url(r'^admin/', admin.site.urls),
    url(r'^$', appdemo_views.index, name='index'),
    url(r'^addUser/', appdemo_views.addUser, name='addUser'),
    url(r'^saveInfo/', appdemo_views.saveInfo, name='saveInfo'),
    url(r'^queryAll/', appdemo_views.queryAll, name='queryAll'),
]

四个URL是首页，添加数据，保存数据，查询所有数据四个链接，与views中四个函数对应。

6 修改appdemo/views.py文件，添加四个函数

from django.shortcuts import render
from .models import UserInfo

# Create your views here.
def index(request):
	return render(request, 'appdemo/index.html')

def addUser(request):
	return render(request, 'appdemo/addUser.html')

def saveInfo(request):
	username = request.POST['username']
	password = request.POST['password']
	UserInfo.objects.create(username=username, password=password)
	return render(request, 'appdemo/index.html')

def queryAll(request):
	data = UserInfo.objects.all()
	return render(request, 'appdemo/showData.html', {'alldata':data})

首页和添加数据页面都是直接返回html文件，保存和查询两个函数需要写入或读取数据库，它们是通过appdemo/models.py文件中UserInfo类实现数据库操作。

django自带的数据库API包含了查询，排序，修改等多个函数，详见http://www.ziqiangxuetang.com/django/django-queryset-api.html

7 在appdemo/models.py中编写数据库操作类UserInfo

from django.db import models

# Create your models here.
class UserInfo(models.Model):
	username = models.CharField(max_length=30)
	password = models.CharField(max_length=30)

	def __str__(self):
		return self.username+", "+self.password

8 编写html文件

index.html

<!DOCTYPE html>
<html>
<head lang="en">
	<meta charset="UTF-8">
	<title>首页</title>
</head>
<body>
	<a href="/addUser/">数据录入</a>
	<a href="/queryAll/">所有数据</a>
</body>
</html>

addUser.html

<!DOCTYPE html>
<html>
<head lang="en">
	<meta charset="UTF-8">
	<title>数据录入</title>
</head>
<body>
	<form action="/saveInfo/" method="post">
		{% csrf_token %}
		用户：<input name="username" type="text" ><br/>
		密码：<input name="password" type="password" ><br/>
		<input type="submit" value="保存" >
	</form>
</body>
</html>

showData.html

<!DOCTYPE html>
<html>
<head lang="en">
	<meta charset="UTF-8">
	<title>所有数据</title>
	<style>
		table, td{font:100% Arial, Helvetica, sans-serif; }
		table{width:100%;border-collapse:collapse;margin:1em 0;}
		th, td{text-align:left;padding:.5em;border:1px solid #fff;}
		th{background:#328aa4 url(tr_back.gif) repeat-x;color:#fff;}
		td{background:#e5f1f4;}
	</style>
</head>
<body>
<div id="container">
	<div id="content">
	<table cellspacing="0" cellpadding="0">
		<tr>
			<th>用户</th>
			<th>密码</th>
		</tr>
		{% for d in alldata %}
			<tr>
			<td>{{d.username}}</td>
			<td>{{d.password}}</td>
			</tr>
		{% endfor %}
	</table>
	</div>
</div>
</body>
</html>

遇到的错误：

1 You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. Django can't redirect to the slash URL while maintaining POST data.

解决方法：在表单的action链接后加上“/”

2 Forbidden (403) CSRF verification failed. Request aborted

在html表单输入部分之前加上“{% csrf_token %}”

【django2】模型 django 1.10 + sqlite3

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