Django snippets: Template filters utils

from django.template import Library

register = Library()

@register.filter
def multiple_of(value,arg):
    return value % arg == 0

@register.filter
def in_list(value,arg):
    return value in arg

@register.filter
def is_equal(value,arg):
    return value == arg

@register.filter
def is_not_equal(value,arg):
    return value != arg

@register.filter
def is_lt(value,arg):
    return int(value) < int(arg)

@register.filter
def is_lte(value,arg):
    return int(value) <= int(arg)

@register.filter
def is_gt(value,arg):
    return int(value) > int(arg)

@register.filter
def is_gte(value,arg):
    return int(value) >= int(arg)

Explanation:

That template filters is util for combine boolean-return conditions using template tag {% if %}.

Setup:

Insert the snippet into an_app/templatetags/myutils.py.

Use in template: {% load myutils %} and use filters as following:

{% if 10|is_multiple_of:5 %}
{% if 10|in_list:a_list_variable %}
{% if user.username|is_equal:a_variable %}
{% if user.username|is_not_equal:a_variable %}
{% if a_variable_|is_lt:5 %}
{% if a_variable_|is_lte:5 %}
{% if a_variable_|is_gt:5 %}
{% if a_variable_|is_gte:5 %}

Author:: marinho
Posted:: November 15, 2007
Language:: Python
Tags:: template-filters
Score:: 2 (after 2 ratings)

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