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  1. Python Driver
  2. PYTHON-2749

Apply database's codec_options to db.command

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    • Type: Icon: Improvement Improvement
    • Resolution: Unresolved
    • Priority: Icon: Unknown Unknown
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    • Affects Version/s: None
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    • Minor Change

      The Database.command method has this caveat:

              .. note:: :meth:`command` does **not** obey this Database's
           :attr:`read_preference` or :attr:`codec_options`. You must use the
           `read_preference` and `codec_options` parameters instead.

      This is often surprising to users since almost every other method does use codec_options.

      Another motivation is that after PYTHON-2245, the default uuidRepresentation will be changed to UNSPECIFIED. This combined with the current db.command behavior means that an app which explicitly sets uuidRepresentation when creating the MongoClient will still get an error when sending a UUID through db.command. Eg:

      >>> client = MongoClient(uuidRepresentation='standard')
>>> client.admin.command('hello', uuidField=uuid.uuid4())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/shane/git/mongo-python-driver/pymongo/database.py", line 604, in command
    return self._command(sock_info, command, slave_ok, value,
  File "/Users/shane/git/mongo-python-driver/pymongo/database.py", line 486, in _command
    return sock_info.command(
  File "/Users/shane/git/mongo-python-driver/pymongo/pool.py", line 730, in command
    self._raise_connection_failure(error)
  File "/Users/shane/git/mongo-python-driver/pymongo/pool.py", line 714, in command
    return command(self, dbname, spec, slave_ok,
  File "/Users/shane/git/mongo-python-driver/pymongo/network.py", line 117, in command
    request_id, msg, size, max_doc_size = message._op_msg(
  File "/Users/shane/git/mongo-python-driver/pymongo/message.py", line 730, in _op_msg
    return _op_msg_uncompressed(
  File "/Users/shane/git/mongo-python-driver/bson/binary.py", line 243, in from_uuid
    raise ValueError(
ValueError: cannot encode native uuid.UUID with UuidRepresentation.UNSPECIFIED. UUIDs can be manually converted to bson.Binary instances using bson.Binary.from_uuid() or a different UuidRepresentation can be configured. See the documentation for UuidRepresentation for more information.

            Assignee:
            Unassigned Unassigned
            Reporter:
            shane.harvey@mongodb.com Shane Harvey
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              Created:
              Updated: