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Breadcrumbs for flatpages

Author:
jca
Posted:
December 20, 2007
Language:
Python
Version:
.96
Score:
3 (after 3 ratings)

Custom template filter to generate a breadcrumb trail for a flatpage. Say you have a series of flatpages with URLs like /trunk/branch/leaf/ etc. This filter looks at the URL of a given flatpage, figures out which of the leftwards text chunks correspond to other flatpages, and generates a string of anchored HTML.

Usage:

{% load make_breadcrumb_trail %}

{{ flatpage.url|crumbs:flatpage.title }}

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from django import template
from django.contrib.flatpages.models import FlatPage

register = template.Library()

def crumbs(url, title):
    "Return breadcrumb trail leading to URL for this page"
    t = title
    s = '  >  '
    c = '<a href="/">Home</a>'
    l = url.split('/')
    for index, item in enumerate(l):
        if item == '':
            del l[index]
    n = len(l)
    if n > 1:
        l[0] = '/' + l[0] + '/'
        for i in range(1, n-1):
            l[i] = l[i-1] + l[i] + '/'
        for index2, item2 in enumerate(l):
            q = FlatPage.objects.filter(url=l[index2])
            if q:
                qa = '<a href="%s">%s</a>' % (q[0].url, q[0].title)
                c = c + s + qa
    c = c + s + t
    return c

register.filter('crumbs', crumbs)

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Comments

bradmontgomery (on June 14, 2009):

Great Snippet that works perfectly. Just a heads-up for anyone else wanting to use this: Don't forget that the app in which this template is installed must be included in INSTALLED_APPS in settings.py.

For example, I have a utils app that contains code used project-wide. I installed this snippet into myproject.utils.templatetags.make_breadcrumb_trail but the {% load make_breadcrumb_trail %} failed until I added 'myproject.utils' to my INSTALLED_APPS.

Thanks!

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