Optional
2dsphereOptional
authdbOptional
backgroundOptional
bitsOptional
bsonreturn BSON regular expressions as BSONRegExp instances.
Optional
bucketOptional
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
commit(MongoDB 4.4. or higher) Specifies how many data-bearing members of a replica set, including the primary, must complete the index builds successfully before the primary marks the indexes as ready. This option accepts the same values for the "w" field in a write concern plus "votingMembers", which indicates all voting data-bearing nodes.
Optional
dbOptional
default_Optional
enableEnable utf8 validation when deserializing BSON documents. Defaults to true.
Optional
expireAllows you to expire data on indexes applied to a data (MongoDB 2.2 or higher)
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
hiddenSpecifies that the index should exist on the target collection but should not be used by the query planner when executing operations. (MongoDB 4.4 or higher)
Optional
ignoreserialize will not emit undefined fields
note that the driver sets this to false
Optional
language_Optional
maxFor geospatial indexes set the high bound for the co-ordinates.
Optional
maxmaxTimeMS is a server-side time limit in milliseconds for processing an operation.
Optional
minFor geospatial indexes set the lower bound for the co-ordinates.
Optional
nameOverride the autogenerated index name (useful if the resulting name is larger than 128 bytes)
Optional
noOptional
omitOptional
partialCreates a partial index based on the given filter object (MongoDB 3.2 or higher)
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
serializeserialize the javascript functions
Optional
sessionSpecify ClientSession for this command
Optional
sparseCreates a sparse index.
Optional
storageAllows users to configure the storage engine on a per-index basis when creating an index. (MongoDB 3.0 or higher)
Optional
textOptional
Experimental
timeoutMSSpecifies the time an operation will run until it throws a timeout error
Optional
uniqueCreates an unique index.
Optional
usewhen deserializing a Long return as a BigInt.
Optional
versionSpecifies the index version number, either 0 or 1.
Optional
weightsOptional
wildcardOptional
will
Creates the index in the background, yielding whenever possible.