Get any value from settings.py as a template variable. The variable can then be used in conditional tags. E.g. to show a link to a help page only if it the help page url is defined in settings.py
{% load get_setting %}
{% get_setting MY_HELP_URL as help_url %}
{% if help_url %}<a href="{% help_url|safe %}">Help</a>{% endif %}
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 | import re
from django.template import Library, Node, TemplateSyntaxError
from django.conf import settings
# E.g. to use the value of MY_HELP_URL from settings.py in a template
# {% get_setting MY_HELP_URL as help_url %}
# {% if help_url %}<a href="{% help_url %}">Help</a>{% endif %}
class SettingNode(Node):
def __init__(self, settingname, var_name):
self.settingname = settingname
self.var_name = var_name
def render(self, context):
context[self.var_name] = getattr(settings, self.settingname, '')
return ''
@register.tag()
def get_setting(parser, token):
try:
tag_name, arg = token.contents.split(None, 1)
except ValueError:
raise TemplateSyntaxError("%r tag requires arguments" % token.contents.split()[0])
m = re.search(r'(.*?) as (\w+)', arg)
if not m:
raise TemplateSyntaxError("%r tag had invalid arguments" % tag_name)
param, var_name = m.groups()
# strip quotes if present
if ( (param[0] in ('"', "'")) and param[0] == param[-1] ):
param = param[1:-1]
return SettingNode(param, var_name)
|
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