django模板标签alias

用法
{% alias my_url %}{% url music "rock","112" %}{% endalias %}
{{ my_url }} {{ my_url }} {{ my_url }}

python 代码

from django import template

register = template.Library()

@register.tag
def alias(parser, token):
    nodelist = parser.parse(('endalias',))
    parser.delete_first_token()
    return Alias(nodelist,token.contents.split()[1])

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

    def render(self, context):
        output=self.nodelist.render(context)
        context[self.alias]=output
        return output

配合上次我写的统计访问的东西,和以下这段代码可以这样使用
            {% alias now_url %}{% url mytube %}{% endalias %}
            {% page_analytic_visit now_url %}

python 代码

from django import template
from django.core.exceptions import ObjectDoesNotExist

from utils.url_decorate.models import PageAnalytic

register = template.Library()

@register.simple_tag
def page_analytic_visit(url):
    try:
        return PageAnalytic.objects.get(url=url).visit
    except ObjectDoesNotExist:
        return 0