django的hello world 项目

一、新建一个django项目bester：

django-admin startproject bester

二、在bester项目中建一个叫polls的应用程序：

cd bester/
python3 manage.py startapp polls

三、给polls加一个叫index的函数：

　　cat polls/views.py

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

def index(requst):
    return HttpResponse("hello world ....")

四、polls增加路由：

　　1、在polls项目中加一个urls.py的文件、里面维护了一组url到视图的对应关系

touch polls/urls.py

　　2、polls/urls.py文件的内容如下：

from django.conf.urls import url
from .views import index


urlpatterns=[
    url(r'^$',index),
]

五、把polls/urls.py中的路由信息增加到项目的路由信息中去：

　　修改bester/urls.py 文件的内容如下：

"""bester URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.conf.urls import url, include
    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url,include
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^polls/',include('polls.urls'))
]

六、启动http服务：

python3 manage.py runserver
Performing system checks...

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.

November 13, 2017 - 08:43:42
Django version 1.11.2, using settings 'bester.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

七、从浏览器打开网页：

总结：

　　以上内容就是django官方文档中的第一个入门的例子了。

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