659                 raise ProcessFormError(form._cw._('a float is expected'))

   659                 raise ProcessFormError(form._cw._('a float is expected'))

   660         return None

   660         return None

   661 

   661 

   662 

   662 

   663 class DateField(StringField):

   663 class DateField(StringField):

   664     format_prop = 'ui.date-format'

   665     format_prop = 'ui.date-format'

   666 

   667 

   667     def format_single_value(self, req, value):

   668     def format_single_value(self, req, value):

   668         return value and ustrftime(value, req.property_value(self.format_prop)) or u''

   669         return value and ustrftime(value, req.property_value(self.format_prop)) or u''

   669 

   670 

   670     def render_example(self, req):

   671     def render_example(self, req):

   678                 raise ProcessFormError(unicode(ex))

   679                 raise ProcessFormError(unicode(ex))

   679         return value

   680         return value

   680 

   681 

   681 

   682 

   682 class DateTimeField(DateField):

   683 class DateTimeField(DateField):

   683     format_prop = 'ui.datetime-format'

   685     format_prop = 'ui.datetime-format'

   684     etype = 'Datetime'

   686     etype = 'Datetime'

   685 

   687 

   686 

   688 

   687 class TimeField(DateField):

   689 class TimeField(DateField):

   688     format_prop = 'ui.time-format'

   691     format_prop = 'ui.time-format'

   689     etype = 'Time'

   692     etype = 'Time'

   690 

   693 

   691 

   694 

   692 # relation vocabulary helper functions #########################################

   695 # relation vocabulary helper functions #########################################