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Question

How to get something to appear on every page in Django?

Answer 1

+2 A:

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"&gt;
<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.

bigjust 2010-01-04 01:39:50

You don't address the issue he shows in the question: view code duplicated in many views.

Ned Batchelder 2010-01-04 01:45:47

thats exactly what view code inheritance addresses.

bigjust 2010-01-04 02:18:14

Actually, it's both! It's a floor wax *and* a dessert topping! We use a combination of context processors and a multi-level template inheritance scheme. The context processors give us the data across all of our views and the template inheritance means that the data lands in the right place on the page.

Peter Rowell 2010-01-04 04:00:04

Answer 2

+2 A:

Middleware is one option or your could write a custom template tag.

Mark Lavin 2010-01-04 01:41:34

Answer 3

+11 A:

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.

Ned Batchelder 2010-01-04 01:43:48

Answer 4

A:

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.

Alex Martelli 2010-01-04 01:45:17

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How to get something to appear on every page in Django?

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