How to get something to appear on every page in Django?
Question
I'm curious as to the best-practise way to handle having something appear on every page, or on a number of pages without having to assign the data manually to every page like so:
# views.py
def page0(request):
return render_to_response(
"core/index.html",
{
"locality": getCityForm(request.user),
},
context_instance=RequestContext(request)
)
def page1(request):
return render_to_response(
"core/index.html",
{
"locality": getCityForm(request.user),
},
context_instance=RequestContext(request)
)
...
def page9(request):
return render_to_response(
"core/index.html",
{
"locality": getCityForm(request.user),
},
context_instance=RequestContext(request)
)
Now I can think of a few ways to do this, including writing my own Context or maybe some middleware, and of course, copy/pasting this locality assignment on every page... I'm just not sure of the best way to do this. I'm pretty sure that it's not that last one though.
4 answers
solution1
16 ACCPTED 2010-01-04 01:43:48
You want a context processor . The data they generate is included in every context created as a RequestContext . They are perfect for this.
Combined with base templates that show common things, you can get rid of lots of need for copying and pasting code.
solution2
3 2010-01-04 01:39:50
use inheritance in the templating engine:
have a base.html that includes the common code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<link rel="stylesheet" href="style.css" />
<title>{% block title %}My amazing site{% endblock %}</title>
</head>
<body>
<div id="sidebar">
{% block sidebar %}
<ul>
<li><a href="/">Home</a></li>
<li><a href="/blog/">Blog</a></li>
</ul>
{% endblock %}
</div>
<div id="content">
{% block content %}{% endblock %}
</div>
</body>
</html>
then in each page that needs that common code, simply:
{% extends "base.html" %}
{% block title %}My amazing blog{% endblock %}
{% block content %}
{% for entry in blog_entries %}
<h2>{{ entry.title }}</h2>
<p>{{ entry.body }}</p>
{% endfor %}
{% endblock %}
http://docs.djangoproject.com/en/dev/topics/templates/#id1
this combined with context processessing will eliminate a lot of duplicate code.
solution3
2 2010-01-04 01:41:34
中间件是一种选择，或者您可以编写自定义模板标签。
solution4
0 2010-01-04 01:45:17
To do exactly what you request, I'd simply define a function:
def foobar(req):
return render_to_response(
"core/index.html",
{
"locality": getCityForm(req.user),
},
context_instance=RequestContext(req)
)
put it in some module myfun , and return myfun.foobar(request) wherever needed. You're likely to want a few more arguments, but as long as it stays about this simple, it's simpler that defining middleware, using OOP, &c.
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