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Deprecate usage of boolean value for widget attributes

Django 1.7 will loudly warn when widget attributes are assigned
boolean values. In Django 1.8, False will mean attribute is not
present while True will mean attribute present without value.
Refs #20684.
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commit 1116df0751cc0d5862590b08adfffe7bacd6bf43 1 parent 7442eb1
@claudep claudep authored
Showing with 7 additions and 0 deletions.
  1. +7 −0 django/forms/
7 django/forms/
@@ -1,5 +1,7 @@
from __future__ import unicode_literals
+import warnings
from django.conf import settings
from django.utils.html import format_html, format_html_join
from django.utils.encoding import force_text, python_2_unicode_compatible
@@ -21,6 +23,11 @@ def flatatt(attrs):
The result is passed through 'mark_safe'.
+ if [v for v in attrs.values() if v is True or v is False]:
+ warnings.warn(
+ 'The meaning of boolean values for widget attributes will change in Django 1.8',
+ DeprecationWarning
+ )
return format_html_join('', ' {0}="{1}"', sorted(attrs.items()))

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