17Django

Posted 2020-08-06

Python Web框架

• 自己实现socket

　　　Tornado

• 基于wsgi：wsgi.run(ip.port)

　　　Django

自己开发we框架

from wsgiref.simple_server import make_server
def RunServer(environ, start_response):
    start_response(‘200 OK‘, [(‘Content-Type‘, ‘text/html‘)])
    return ‘<h1>Hello, web!<h1>‘

if __name__ == ‘__main__‘:
    httpd = make_server(‘‘, 8000, RunServer)
    print("Serving HTTP on port 8000...")
    httpd.serve_forever()

Web框架

Web框架	处理用户请求	放置HTML模版	操作数据库	框架
MVC	Controllers	Views	Modals
MTV	Views	Template	Modals	Django

 

 

 

 

 

Django

1. 安装Django

pip3 install django
# 添加环境变量

2. 创建Project

django-admin startproject mysite

########################################
# mysite目录 
mysite
│  manage.py       # diango程序启动文件
│
└─mysite
        settings.py     # 配置文件
        urls.py           # 路由系统
        wsgi.py          # WSGI
        __init__.py

3. 创建APP

cd mysite
python manage.py startapp cmdb


###################################
cmdb目录
│  admin.py        # 后台管理配置模块
│  apps.py         #
│  models.py       # 数据库管理配置模块
│  tests.py        # 单元测试模块
│  views.py        # 处理用户请求模块

4. 编写代码

urls.py

from django.conf.urls import url
from django.contrib import admin
from cmdb import views

urlpatterns = [
    # url(r‘^admin/‘, admin.site.urls),
    url(r‘^index/‘, views.index),
]

view.py 函数

from django.shortcuts import render
from django.shortcuts import HttpResponse

# Create your views here.
# 处理用户请求
def index(request):
    return HttpResponse(‘Hello Web !‘)

5. 启动Django程序

# 执行命令
python manage.py runserver 127.0.0.1:8000

# 启动信息
System check identified no issues (0 silenced).
You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run ‘python manage.py migrate‘ to apply them.
August 28, 2016 - 19:01:32
Django version 1.10, using settings ‘mysite_django.settings‘
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.

页面显示结果

 

6. 使用模版

settings配置

render(request, ‘路径‘)

7.  静态文件的配置

8.  基本提交数据

9. 连接数据库、操作数据库

ORM

settings.py

models.py

10. 注册app

执行命令创建数据库：

python manage.py makemigrations
python manage.py migrate

11. 操作数据库

创建：

models.类.object.create(user=u,email=e)

获取：

models.类.object.all()