form: fix handling of date in iso format in French-configured sites (#6390)

tests/test_widgets.py

@@ -242,16 +242,21 @@ def test_date_widget():
     req.form = {}
     assert widget.parse() is None
 
+    pub.cfg['language'] = {'language': 'en'}
     widget = DateWidget('test')
     mock_form_submission(req, widget, {'test': '2014-1-20'})
     assert not widget.has_error()
-    assert widget.parse() == '2014-1-20'
+    assert widget.parse() == '2014-01-20'
 
     pub.cfg['language'] = {'language': 'fr'}
     widget = DateWidget('test')
     mock_form_submission(req, widget, {'test': '20/1/2014'})
     assert not widget.has_error()
-    assert widget.parse() == '20/1/2014'
+    assert widget.parse() == '20/01/2014'
+
+    mock_form_submission(req, widget, {'test': '2014-1-20'})
+    assert not widget.has_error()
+    assert widget.parse() == '20/01/2014'
 
     widget = DateWidget('test', minimum_date='1/1/2014')
     mock_form_submission(req, widget, {'test': '20/1/2014'})

wcs/qommon/form.py

@@ -803,6 +803,7 @@ class DateWidget(StringWidget):
                     value = time.strptime(self.value, format_string)
                 except ValueError:
                     continue
+                self.value = strftime(self.get_format_string(), value)
                 break
             else:
                 self.error = _('invalid date')