如何制作行为与simple_tag或assignment_tag相同的标记,{% mytag %}
和{% mytag as varname %}
都可以?使用以下代码,我无法使用{% mytag %}
等标记。
@register.assignment_tag
def mytag():
return 'hello, world!'
答案 0 :(得分:1)
您可以使用节点,例如:
<强> inbox.py 强>
from django.template import Library, Node, TemplateSyntaxError
class InboxOutput(Node):
def __init__(self, varname=None):
self.varname = varname
def render(self, context):
return ...
def inbox_count(parser, token):
"""
Usage::
{% load inbox %}
{% inbox_count %}
{# or assign the value to a variable: #}
{% inbox_count as my_var %}
{{ my_var }}
"""
bits = token.contents.split()
if len(bits) > 1:
if len(bits) != 3:
raise TemplateSyntaxError, "inbox_count tag takes either no arguments or exactly two arguments"
if bits[1] != 'as':
raise TemplateSyntaxError, "first argument to inbox_count tag must be 'as'"
return InboxOutput(bits[2])
else:
return InboxOutput()
register = Library()
register.tag('inbox_count', print_inbox_count)