Django template filter for checking if a field is a BooleanField (checkbox)

django_is_checkbox,py

#-*- coding: utf-8 -*-

from django.forms.widgets import CheckboxInput

from .. import register


@register.filter
def is_checkbox(field):
    if isinstance(field.field.widget, CheckboxInput):
        return True
    else:
        return False

tests.py

#-*- coding: utf-8 -*-

from django.test import TestCase


class UtilsTemplateTagTests(TestCase):

    def test_is_checkbox(self):
        """
        return True if the field is a checkbox
        """
        class CheckBoxForm(forms.Form):
            checkbox = forms.BooleanField()
            nocheckbox = forms.CharField()

        out = Template(
            "{% load spirit_tags %}"
            "{% for field in form.visible_fields %}"
            "{{ field|is_checkbox }},"
            "{% endfor %}"
        ).render(Context({'form': CheckBoxForm(), }))
        self.assertEqual(out.strip(), "True,False,")

import .. register

is:

from django import template
register = template.Library()