Template tag to sort a list of links

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
import operator
import re

from django import template


register = template.Library()
a_re = re.compile(r'<a.+?>\s*(.*)\s*')
space_re = re.compile(r'\s+')


@register.tag
def anchorsort(parser, token):
    """ Sorts a list of links, <a href="..."...>Anchor Text</a>. """
    nodelist = parser.parse(('endanchorsort',))
    parser.delete_first_token()
    return AnchorSortNode(nodelist)


class AnchorSortNode(template.Node):
    def __init__(self, nodelist):
        self.nodelist = nodelist

    def render(self, context):
        content = self.nodelist.render(context)

        try:
            anchorlist = [space_re.sub(" ", a).strip() for a in content.split("</a>") if len(a.strip())]

            # Compose the list of tuples, (text, <a href...>text</a>) and sort it based on the first item.
            anchorlist = [(a_re.search(x).groups(1)[0].lower(), x) for x in anchorlist]
            anchorlist.sort(key=operator.itemgetter(0))

            return "</a>".join([item[1] for item in anchorlist]) + "</a>" if anchorlist else ""
        except:
            return content

More like this

  1. Sort Table Headers by insin 7 years ago
  2. Repeat blocks with new context / simple Jinja-like macro system by miracle2k 6 years, 11 months ago
  3. Make tags easier with properties by ubernostrum 7 years, 4 months ago
  4. Display arbitrary models by bjornkri 5 years, 12 months ago
  5. Humanize lists of strings in templates by ChipX86 7 years, 1 month ago

Comments

(Forgotten your password?)