模板系统

用到的代码会放在文末

模板：一组相同或者相似的页面，在需要个性化的地方进行留白，需要的时候只是用数据填充就可以使用
步骤:
1. 在settings中进行设置: TEMPLATES
2. 在templates文件夹下编写模板并调用

模板-变量

变量的表示方法；{ {var_name}}
在系统调用模板的时候，会用相应的数据查找相应的变量名称，如果能找到，则填充，或者叫渲染，否则，跳过
案例 two.html

<!DOCTYPE html>

案例二

Hello {
{name}}

Hello {
{name2}}

模板-标签

for标签： {% for … in … %}

用法：

{% for .. in .. %}
      循环语句
  {% endfor %}

案例 three.html，显示班级成绩

<!DOCTYPE html>

案例三

{% for s in score %}

{
{s}}

{% endfor %}

if 标签

用来判断条件

代码示例：

{& if 条件 &}
      条件成立执行语句
  {% elif 条件 %}
      条件成立执行语句
  {% else %}
      以上条件都不成立执行语句
  {% endif %}

案例 four.html

<!DOCTYPE html>

案例四

{% if name == “ruochen” %}

{
{name}}, 你好，

{% elif name == “ruo” %}

{
{name}}, 你还记得大明湖畔的下雨天的荷吗？

{% else %}

{
{name}}, 你还有遗憾吗？

{% endif %}

csrf 标签

csrf：跨站请求伪造
在提交表单的时候，表单页面需要加上 {% csrf_token %}
案例five_get, five_post

<!DOCTYPE html>

案例五

{% csrf_token %}
用户名:

密码:

源码

urls.py

from django.conf.urls import include, url
from django.contrib import admin
from mytpl import views as v

urlpatterns = [

# Examples:
# url(r'^$', 'django_tpl.views.home', name='home'),
# url(r'^blog/', include('blog.urls')),
url(r'^admin/', include(admin.site.urls)),
url(r'^one/', v.one),
url(r'^two/', v.two),
url(r'^three/', v.three),
url(r'^four/', v.four),
url(r'^five_get/', v.five_get),
url(r'^five_post/', v.five_post),

]

views.py

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

Create your views here.

def one(request):

return render(request, r'one.html')

def two(request):

# 用来存放模板中传递的数据
ct = dict()
ct['name'] = 'ruochen'
ct['name2'] = 'ruo'
return render(request, r'two.html', context=ct)

def three(request):

ct = dict()
ct['score'] = [99, 86, 23, 100, 46]
return render(request, r'three.html', context=ct)

def four(request):

ct = dict()
ct['name'] = 'ru'
return render(request, r'four.html', context=ct)

def five_get(request):

return render(request, r'five_get.html')

def five_post(request):

print(request.POST)
return render(request, r'one.html')

settings.py

“”” Django settings for django_tpl project. Generated by ‘django-admin startproject’ using Django 1.8. For more information on this file, see https://docs.djangoproject.com/en/1.8/topics/settings/ For the full list of settings and their values, see https://docs.djangoproject.com/en/1.8/ref/settings/ “””

Build paths inside the project like this: os.path.join(BASE_DIR, …)
import os

BASEDIR = os.path.dirname(os.path.dirname(os.path.abspath(_file)))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '_qwgzdbkb&m5tzm%@b*^xh7(!u-)-v&&uk896dxj)wj3^@h_xb'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'mytpl',
)
MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
)
ROOT_URLCONF = 'django_tpl.urls'
TEMPLATES = [
    { 
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        # 告诉django，在当前项目目录下查询叫templates的文件夹，下面是模板
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': { 
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]
WSGI_APPLICATION = 'django_tpl.wsgi.application'
# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases
DATABASES = { 
    'default': { 
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
# Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/
STATIC_URL = '/static/'