Solr.add with datetime instance causes TypeError

[o-felixz]

Calling pysolr.Solr.add with a dict containing a datetime object causes the following stack trace:

  File "<>/.local/lib/python3.7/site-packages/pysolr.py", line 1018, in add
    m = json.dumps(message).encode("utf-8")
  File "/usr/lib/python3.7/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib/python3.7/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/python3.7/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib/python3.7/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type datetime is not JSON serializable

I believe this change to be the breaking change.

Before this change the datetime object could propagate via self._build_doc to self._from_python where the first check would have converted it to a string.

I have

• Tested with the latest release
• Tested with the current master branch
• Searched for similar existing issues

Expected behaviour

No exception

Actual behaviour

TypeError: Object of type datetime is not JSON serializable

Configuration

• Operating system version: debian 10
• Search engine version: 8.5.1
• Python version: 3.7
• pysolr version: 3.9.0

[roebius]

I see there was no reply yet to this issue. Is there any plan to solve it or at least any suggested workaround?
Thx

[acdha]

You can go back to using the XML interface using the optional parameter, call isoformat() on the date objects before passing them in. It would be nice if we had a JSON encoder which handles this, too, if you have time to contribute one.

[roebius]

Thanks for the suggestion.
I am now just passing datetime(...).isoformat() instead of datetime(...) and everything works fine. I did not try the XML interface.

Regarding the encoder, I will not have the time, unfortunately.