Error fetching materialization meta data

[schlegelp]

Looks like one of the materialization versions does not have an expiry date which then causes troubles in CAVEclient?

>>> client.materialize.get_versions_metadata()
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Input In [31], in <module>
----> 1 client.materialize.get_versions_metadata()

File ~/.pyenv/versions/3.9.9/lib/python3.9/site-packages/cachetools/__init__.py:520, in cached.<locals>.decorator.<locals>.wrapper(*args, **kwargs)
    518 except KeyError:
    519     pass  # key not found
--> 520 v = func(*args, **kwargs)
    521 try:
    522     cache[k] = v

File ~/.pyenv/versions/3.9.9/lib/python3.9/site-packages/caveclient/materializationengine.py:363, in MaterializatonClientV2.get_versions_metadata(self, datastack_name)
    361 for md in d:
    362     md["time_stamp"] = convert_timestamp(md["time_stamp"])
--> 363     md["expires_on"] = convert_timestamp(md["expires_on"])
    364 return d

File ~/.pyenv/versions/3.9.9/lib/python3.9/site-packages/caveclient/materializationengine.py:78, in convert_timestamp(ts)
     76 elif isinstance(ts, float):
     77     return datetime.fromtimestamp(ts)
---> 78 dt = datetime.strptime(ts, "%Y-%m-%dT%H:%M:%S.%f")
     79 return dt.replace(tzinfo=timezone.utc)

TypeError: strptime() argument 1 must be str, not None

This is with 4.11.0

[fcollman]

we think we have addressed this with #67