return BSON regular expressions as BSONRegExp instances.
the serializer will check if keys are valid.
Enable utf8 validation when deserializing BSON documents. Defaults to true.
allow to specify if there what fields we wish to return as unserialized raw buffer.
serialize will not emit undefined fields (default:true)
when deserializing a Binary will return it as a node.js Buffer instance.
when deserializing a Long will fit it into a Number if it's smaller than 53 bits
when deserializing will promote BSON values to their Node.js closest equivalent types.
Enabling the raw option will return a Node.js Buffer which is allocated using allocUnsafe API. See this section from the Node.js Docs here for more detail about what "unsafe" refers to in this context. If you need to maintain your own editable clone of the bytes returned for an extended life time of the process, it is recommended you allocate your own buffer and clone the contents:
The preferred read preference (ReadPreference.primary, ReadPreference.primary_preferred, ReadPreference.secondary, ReadPreference.secondary_preferred, ReadPreference.nearest).
Specify ClientSession for this command
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