Django Basics

There are many Django, Tornado, Flask and other Python's WEB framework, Django compared to other WEB framework of its advantages: large and framework itself integrates the ORM, model binding, template engine, cache, Session, and many other functions. Today learn together under Django;

1. Preparations

Installation using pip: pip install Django

2. Basic Configuration

1) Create a program django

a command terminal:. django-admin startproject mysite, when creating IDE django program, these commands are executed essentially automatically

2) the directory structure is as follows:

3) configuration file - (settings.py)

a. Database

b. Templates

c. static files

3. Create App

a. command

python manage.py startapp cmdb

. B cmdb directory structure is as follows:

4. Log Examples

a. templates generated html file directory, such as login.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>

<body>
    <form action='/login/' method='POST'>
        <p>
            <input type="text" name="user" placeholder="用户名"/>
        </p>
        <p>
            <input type="password" name="pwd" placeholder="密码"/>
        </p>
        <p>
            男:<input type="radio" name="sex" value="男"/>
            女:<input type="radio" name="sex" value="女"/>
        </p>
        <p>
            <input type="submit" value="提交"/>
        </p>
    </form>

</body>
</html>

b. 修改url文件，定义路由规则

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

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^login/', views.login),

]

c. 定义视图函数：app下views.py

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

# Create your views here.

USER_LIST = {}
def login(request):
    if request.method == 'GET':    #判断请求方式
        return render(request, 'login.html')
    elif request.method == 'POST':
        user = request.POST.get('user')   #post请求，单选、输入框获取值
        pwd = request.POST.get('pwd')
        sex = request.POST.get('sex')
        if user and pwd:
            USER_LIST['name'] = user
            USER_LIST['pwd'] = pwd
            USER_LIST['sex'] = sex
            return render(request, 'success.html', {"user_list": USER_LIST}) 
        else:
            return HttpResponse('请求不能为空')
    else:
        return HttpResponse('请求方式不是get\post')   #HttpResponse("字符串")

d. 提交成功后，跳转到success.html页面， hmtl模板获取字典数据

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录成功页面</title>
</head>
<body>

  {{ user_list.name}}  #获取字典中某个key的值

 
  <ul>
      {% for k,v in user_list.items %}  #循环字典
          <li>{{ k }} : {{ v }}</li>
      {% endfor %}
  </ul>

</body>
</html>

1. Preparations

2. Basic Configuration

3. Create App

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