Ok after some investigating I have noticed the first attempt gives no errors, all subsequent attempts give the client modified nonetype error.
After some googling I finally came accross some info that this is a known issue with datetime in python.
I found this:
try:
datetime.strptime(date_string, format)
except TypeError:
datetime(*(time.strptime(date_string, format)[0:6]))
So I decided to manually tweak the make stone friendly function in the api to this.
def _make_stone_friendly(
data_type, val, alias_validators, strict, validate, for_msgpack):
"""
Convert a Python object to a type that will pass validation by its
validator.
Validation by ``alias_validators`` is performed even if ``validate`` is
false.
"""
if isinstance(data_type, bv.Timestamp):
try:
ret = datetime.datetime.strptime(val, data_type.format)
except:
print("datetime.datetime.strptime(val, data_type.format) returned NoneType. Trying alterntive")
pass
try:
ret = datetime.datetime(*(time.strptime(val, data_type.format)[0:6]))
except (TypeError, ValueError) as e:
raise bv.ValidationError(e.args[0])
elif isinstance(data_type, bv.Bytes):
if for_msgpack:
if isinstance(val, six.text_type):
ret = val.encode('utf-8')
else:
ret = val
else:
try:
ret = base64.b64decode(val)
except TypeError:
raise bv.ValidationError('invalid base64-encoded bytes')
elif isinstance(data_type, bv.Void):
if strict and val is not None:
raise bv.ValidationError("expected null, got value")
return None
else:
if validate:
data_type.validate(val)
ret = val
if alias_validators is not None and data_type in alias_validators:
alias_validators[data_type](ret)
return ret
I can say it is now working every time without error.
I'm sure you don't like the code being altered and I can totally understand that but if you think the code doesn't look like it will yeild any issues then I'm happy to do a pull request on github.
