From ac3aaaa740dcf9c6efd2f88ee9219c1924c7695e Mon Sep 17 00:00:00 2001
From: Jon Dufresne <jon.dufresne@gmail.com>
Date: Thu, 21 Jul 2016 17:16:22 -0700
Subject: Fixed #26927 -- Made subwidget iteration pass disabled and required
 attributes.

---
 django/forms/widgets.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'django/forms/widgets.py')

diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 604a6a401a..217f37b022 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -787,6 +787,13 @@ class CheckboxSelectMultiple(RendererMixin, SelectMultiple):
     renderer = CheckboxFieldRenderer
     _empty_value = []
 
+    def build_attrs(self, extra_attrs=None, **kwargs):
+        attrs = super(CheckboxSelectMultiple, self).build_attrs(extra_attrs, **kwargs)
+        # Remove the 'required' attribute because browser validation would
+        # require all checkboxes to be checked instead of at least one.
+        attrs.pop('required', None)
+        return attrs
+
 
 class MultiWidget(Widget):
     """
-- 
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