Widget CheckboxInput show_hidden_initial _has_changed bug

[dibrovsd@…]

django.forms.CheckboxInput

have method

def _has_changed(self, initial, data):

# Sometimes data or initial could be None or u which should be the
# same thing as False.
return bool(initial) != bool(data)

initial may be u'False' or u'True'
bool(initial) always return True for unicode len(initial) > 1

if initial == u'False' and data == u'on' always return False
bool(u'False') = True
bool(u'on') = True
path:
def _has_changed(self, initial, data):

initial = True if initial == u'True' else False
return initial != bool(data)