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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: 3.7.2
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Component/s: Error Handling
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None
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Environment:Installed via Anaconda
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None
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Fully Compatible
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None
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None
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None
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None
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None
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None
The Issue
The error message produced by `bson.json_util.loads` when in incorrect date format is provided is unhelpful and, probably, incorrect.
To Reproduce
from bson import json_util json_util.loads('{"$date": "2019-01-01T01:02:03"}')
This produces the following error (full traceback below):
ValueError: time data '2019-01-01T01' does not match format '%Y-%m-%dT%H:%M:%S'
This indicates that the format should be "%Y-%m-%dT%H:%M:%S and suggests that the value that was passed in is six characters shorter than the true input value. In reality, the format should be "%Y-%m-%dT%H:%M:%S.%L" in MongoDB's format syntax or "%Y-%m-%dT%H:%M:%S.%f" in the syntax used by Python's datetime package.
Full Traceback
In [4]: json_util.loads('\{"$date": "2019-01-01T01:02:03"}') --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-4-85a7366e7304> in <module> ----> 1 json_util.loads('\{"$date": "2019-01-01T01:02:03"}') ~/apps/anaconda3/lib/python3.6/site-packages/bson/json_util.py in loads(s, *args, **kwargs) 436 else: 437 kwargs["object_hook"] = lambda obj: object_hook(obj, json_options) --> 438 return json.loads(s, *args, **kwargs) 439 440 ~/apps/anaconda3/lib/python3.6/json/__init__.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw) 365 if parse_constant is not None: 366 kw['parse_constant'] = parse_constant --> 367 return cls(**kw).decode(s) ~/apps/anaconda3/lib/python3.6/json/decoder.py in decode(self, s, _w) 337 338 """ --> 339 obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 340 end = _w(s, end).end() 341 if end != len(s): ~/apps/anaconda3/lib/python3.6/json/decoder.py in raw_decode(self, s, idx) 353 """ 354 try: --> 355 obj, end = self.scan_once(s, idx) 356 except StopIteration as err: 357 raise JSONDecodeError("Expecting value", s, err.value) from None ~/apps/anaconda3/lib/python3.6/site-packages/bson/json_util.py in <lambda>(pairs) 433 if _HAS_OBJECT_PAIRS_HOOK: 434 kwargs["object_pairs_hook"] = lambda pairs: object_pairs_hook( --> 435 pairs, json_options) 436 else: 437 kwargs["object_hook"] = lambda obj: object_hook(obj, json_options) ~/apps/anaconda3/lib/python3.6/site-packages/bson/json_util.py in object_pairs_hook(pairs, json_options) 455 456 def object_pairs_hook(pairs, json_options=DEFAULT_JSON_OPTIONS): --> 457 return object_hook(json_options.document_class(pairs), json_options) 458 459 ~/apps/anaconda3/lib/python3.6/site-packages/bson/json_util.py in object_hook(dct, json_options) 464 return _parse_canonical_dbref(dct) 465 if "$date" in dct: --> 466 return _parse_canonical_datetime(dct, json_options) 467 if "$regex" in dct: 468 return _parse_legacy_regex(dct) ~/apps/anaconda3/lib/python3.6/site-packages/bson/json_util.py in _parse_canonical_datetime(doc, json_options) 598 599 aware = datetime.datetime.strptime( --> 600 dt, "%Y-%m-%dT%H:%M:%S").replace(microsecond=microsecond, 601 tzinfo=utc) 602 ~/apps/anaconda3/lib/python3.6/_strptime.py in _strptime_datetime(cls, data_string, format) 563 """Return a class cls instance based on the input string and the 564 format string.""" --> 565 tt, fraction = _strptime(data_string, format) 566 tzname, gmtoff = tt[-2:] 567 args = tt[:6] + (fraction,) ~/apps/anaconda3/lib/python3.6/_strptime.py in _strptime(data_string, format) 360 if not found: 361 raise ValueError("time data %r does not match format %r" % --> 362 (data_string, format)) 363 if len(data_string) != found.end(): 364 raise ValueError("unconverted data remains: %s" % ValueError: time data '2019-01-01T01' does not match format '%Y-%m-%dT%H:%M:%S'