1.RequestContext和Context处理器
views.py
from django.http import HttpResponse
from django.template import loader, Context
def view_1(request):
t = loader.get_template('app.html') #创建Template对象
c = Context({ #创建Context对象
'app': 'My app',
'user': 'a',
'ip_address': 'b',
'message': 'I am view 1.'
})
html = t.render(c) #调用render()方法
return HttpResponse(html)urls.py
from books import views (r'^context/$', views.view_1)
app.html
`app` `user` `ip_address` `message`
访问http://192.168.1.22/context/运行结果
My app a b I am view 1.
2.三种方式实现相同的输出
views.py
from django.http import HttpResponse
#def current_datetime(request):
# now = datetime.datetime.now()
# html = "<html><body>It is now %s.</body></html>" % now
# return HttpResponse(html)
#def current_datetime(request):
# now = datetime.datetime.now()
# t = get_template('current_datetime.html')
# html = t.render(Context({'current_date':now}))
#return HttpResponse(html)
def current_datetime(request):
now = datetime.datetime.now()
return render_to_response('dataapp/current_datetime.html',{'current_date':now})urls.py
from books import views (r'^time/$',current_datetime),
current_datetime.html
{% extends "base.html" %}
{% block title %} The current time {% endblock %}
{% block content %}
<p> It is now{{ current_date }}.</p>
{% endblock %}访问结果
3.模板描述了向某个与公司签单人员致谢的HTML页面
views.py
def order(request):
t = loader.get_template('order.html')
c = Context({'person_name': 'John Smith',
'company': 'JD',
'ship_date': datetime.date(2009, 4, 2),
'ordered_warranty': True})
html = t.render(c)
return HttpResponse(html)urls.py
(r'^order/$', views.order)
order.html
<html>
<head><title>Ordering notice</title></head>
<body>
<h1>Ordering notice</h1>
<p>Dear {{ person_name }},</p>
<p>Thanks for placing an order from {{ company }}. It's scheduled to
ship on {{ ship_date|date:"F j, Y" }}.</p>
<p><b>Here are the items you've ordered:</b></p>
<ul>
{% for item in item_list %}
<li>{{ item }}</li>
{% endfor %}
</ul>
<canvas id="myCanvas" width="170" height="50" style="border:1px solid #c3c3c3;">
Your browser does not support the canvas element.
</canvas>
<script type="text/javascript">
var c=document.getElementById("myCanvas");
var cxt=c.getContext("2d");
var grd=cxt.createLinearGradient(0,0,175,50);
grd.addColorStop(0,"#FF0000");
grd.addColorStop(1,"#00FF00");
cxt.fillStyle=grd;
cxt.fillRect(0,0,175,50);
</script>
{% if ordered_warranty %}
<p>Your warranty information will be included in the packaging.</p>
{% else %}
<p>You didn't order a warranty, so you're on your own when
the products inevitably stop working.</p>
{% endif %}
<p>Sincerely,<br />{{ company }}</p>
<form action="/time/" method="post">
<p>Subject: <input type="text" name="subject"></p>
<p>Your e-mail (optional): <input type="text" name="email"></p>
<p>Message: <textarea name="message" rows="10" cols="50"></textarea></p>
<input type="submit" value="Submit">
</form>
</body>
</html>访问结果
点击Submit按钮跳转到http://192.168.1.22/time/页面
5.html内容写在Template
views.py
from django.template import Context,Template
def weekend(request):
t = Template('<html><body>{% if not today_is_weekend %}<p>{{ Name }},Welcome to the weekend!</p>{% endif %}</html></body>')
c = Context({'Name':'Allen'})
html = t.render(c)
return HttpResponse(html)访问结果：
5.自定义标签和过滤器
views.py
def dragon(request):
return render_to_response('dragon.html')urls.py
(r'^dragon/$', views.dragon)
myNewLibrary.py
import datetime from django import template register = template.Library() @register.filter(name='remove') def remove(var,arg): return var.replace(arg, '') @register.filter def lower(value): "Converts a string inot all lowercase" return value.lower() @register.tag(name='current_time') def do_current_time(parser, token): try: tag_time, format_string = token.split_contents() except ValueError: msg = '%r tag requires a single argument' % token.split_contents()[0] raise template.TemplateSyntaxError(msg) return CurrentTimeNode(format_string[1:-1]) class CurrentTimeNode(template.Node): def __init__(self, format_string): self.format_string = str(format_string) def render(self, context): now = datetime.datetime.now() return now.strftime(self.format_string)
dragon.html
<html>
<head>
<title></title>
</head>
<body>
{% load myNewLibrary %}
<p>The time is {% current_time "%Y-%m-%d %I:%M %p" %}.</p>
</body>
</html>访问结果：
