def to_python(self, value):
"""
Validates that the input can be converted to a date.
Returns a flexibledate object.
"""
if not value:
return None
if isinstance(value, flexibledate):
return value
try:
return flexibledate(value)
except (ValueError, TypeError), inst:
raise ValidationError(inst)
def value_from_datadict(self, data, files, name):
try:
y = int(data.get(self.year_field % name))
except:
y = 0
try:
m = int(data.get(self.month_field % name))
except:
m = 0
try:
d = int(data.get(self.day_field % name))
except:
d = 0
if y == m == d == "0":
return None
if y:
return flexibledate('%04d%02d%02d' % (y, m or 0, d or 0))
return data.get(name, None)
