id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
17542	SelectDateWidget with required=false throws exception in _has_changed	x.g10f.de	Maciej Wiśniowski	"When accessing changed_data in a form with SelectDateWidget with required=false and no values for year, month and date selected i get an exception.
The exception is thrown in strptime in 
{{{
#!div style=""font-size: 80%""
Code highlighting:
  {{{#!python
    def _has_changed(self, initial, data):
        input_format = get_format('DATE_INPUT_FORMATS')[0]
        data = datetime_safe.datetime.strptime(data, input_format).date()
        return super(SelectDateWidget, self)._has_changed(initial, data)  
  }}}
}}}
because data is None"	Bug	closed	Forms	1.4-alpha-1	Normal	fixed	SelectDateWidget   required false	restless.being@…	Ready for checkin	1	0	0	0	0	0