Optional
arrayOptional
authdbOptional
bsonreturn BSON regular expressions as BSONRegExp instances.
Optional
bypassAllow driver to bypass schema validation.
Optional
checkthe serializer will check if keys are valid.
Optional
collationCollation
Optional
commentComment to apply to the operation.
In server versions pre-4.4, 'comment' must be string. A server error will be thrown if any other type is provided.
In server versions 4.4 and above, 'comment' can be any valid BSON type.
Optional
dbOptional
enableEnable utf8 validation when deserializing BSON documents. Defaults to true.
Optional
explainSpecifies the verbosity mode for the explain output.
Optional
fieldsallow to specify if there what fields we wish to return as unserialized raw buffer.
Optional
hintAn optional hint for query optimization. See the command reference for more information.
Optional
ignoreserialize will not emit undefined fields
note that the driver sets this to false
Optional
includeReturn the ModifyResult instead of the modified document. Defaults to false
Optional
letMap of parameter names and values that can be accessed using $$var (requires MongoDB 5.0).
Optional
maxOptional
noOptional
omitOptional
projectionLimits the fields to return for all matching documents.
Optional
promotewhen deserializing a Binary will return it as a node.js Buffer instance.
Optional
promotewhen deserializing a Long will fit it into a Number if it's smaller than 53 bits.
Optional
promotewhen deserializing will promote BSON values to their Node.js closest equivalent types.
Optional
rawEnabling 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:
const raw = await collection.findOne({}, { raw: true });
const myBuffer = Buffer.alloc(raw.byteLength);
myBuffer.set(raw, 0);
// Only save and use `myBuffer` beyond this point
Please note there is a known limitation where this option cannot be used at the MongoClient level (see NODE-3946).
It does correctly work at Db
, Collection
, and per operation the same as other BSON options work.
Optional
readSpecify a read concern and level for the collection. (only MongoDB 3.2 or higher supported)
Optional
readThe preferred read preference (ReadPreference.primary, ReadPreference.primary_preferred, ReadPreference.secondary, ReadPreference.secondary_preferred, ReadPreference.nearest).
Optional
retryShould retry failed writes
Optional
returnWhen set to 'after', returns the updated document rather than the original. The default is 'before'.
Optional
serializeserialize the javascript functions
Optional
sessionSpecify ClientSession for this command
Optional
sortDetermines which document the operation modifies if the query selects multiple documents.
Optional
upsertUpsert the document if it does not exist.
Optional
usewhen deserializing a Long return as a BigInt.
Optional
willOptional
writeWrite Concern as an object
Optional list of array filters referenced in filtered positional operators