Django templates: testing if variable is in list or dict
was wondering if there is a way to test if a variable is inside of a list or dict in django using the built in tags and filters.
Ie: {% if var|in:the_list %}
I don't see it in the docs, and will attempt something custom if not, but I don't want to do something that has already been done.开发者_运维百科
Thanks
In Django 1.2, you can just do
{% if var in the_list %}
as you would in Python.
Otherwise yes, you will need a custom filter - it's a three-liner though:
@register.filter
def is_in(var, obj):
return var in obj
Want to pass a comma separated string from the template? Create a custom templatetag:
from django import template
register = template.Library()
@register.filter
def in_list(value, the_list):
value = str(value)
return value in the_list.split(',')
You can then call it like this:
{% if 'a'|in_list:'a,b,c,d,1,2,3' %}Yah!{% endif %}
It also works with variables:
{% if variable|in_list:'a,b,c,d,1,2,3' %}Yah!{% endif %}
In Django 3... It's simply by:
someHtmlPage.html
<html>
{%if v.0%}
<p>My string {{v}}</p>
{%else%}
<p>My another typy {{v}}</p>
{%endif%}
</html>
加载中,请稍侯......
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