I'v written a catch tag, and it can catch the output of it content
(even sub tag in it), then save the output to a var_name. for example:
{% load utiltags %}
{% catch as a %}
{% now "jS F Y H:i" %}
{% endcatch %}
Current time is {{ a }}
the code is:
---------------------------utiltag.py-------------------------------
from django import template
import re
register = template.Library()
class CatchNode(template.Node):
def __init__(self, nodelist, var_name):
self.nodelist = nodelist
self.var_name = var_name
def render(self, context):
output = self.nodelist.render(context)
context[self.var_name] = output
return ''
def do_catch(parser, token):
"""
Catch the content and save it to var_name
Example::
{% catch as var_name %} ... {% endcatch %}
"""
try:
tag_name, arg = token.contents.split(None, 1)
except ValueError:
raise template.TemplateSyntaxError, "%r tag requires
arguments" % token.contents[0]
m = re.search(r'as (\w+)', arg)
if not m:
raise template.TemplateSyntaxError, '%r tag should define as
"%r as var_name"' % (tag_name, tag_name)
var_name = m.groups()[0]
nodelist = parser.parse(('endcatch',))
parser.delete_first_token()
return CatchNode(nodelist, var_name)
do_catch = register.tag('catch', do_catch)
I hope this tag will be helpful.
--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit
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