Optional
allowAllows disk use for blocking sort operations exceeding 100MB memory. (MongoDB 3.2 or higher)
Optional
allowFor queries against a sharded collection, allows the command (or subsequent getMore commands) to return partial results, rather than an error, if one or more queried shards are unavailable.
Optional
authdbOptional
awaitSpecify if the cursor is a tailable-await cursor. Requires tailable
to be true
Optional
batchSet the batchSize for the getMoreCommand when iterating over the query results.
Optional
bsonreturn BSON regular expressions as BSONRegExp instances.
Optional
checkthe serializer will check if keys are valid.
Optional
collationSpecify collation (MongoDB 3.4 or higher) settings for update operation (see 3.4 documentation for available fields).
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
hintTell the query to use specific indexes in the query. Object of indexes to use, {'_id':1}
Optional
ignoreserialize will not emit undefined fields
note that the driver sets this to false
Optional
letMap of parameter names and values that can be accessed using $$var (requires MongoDB 5.0).
Optional
limitSets the limit of documents returned in the query.
Optional
maxThe exclusive upper bound for a specific index
Optional
maxThe maximum amount of time for the server to wait on new documents to satisfy a tailable cursor query. Requires tailable
and awaitData
to be true
Optional
maxNumber of milliseconds to wait before aborting the query.
Optional
minThe inclusive lower bound for a specific index
Optional
noThe server normally times out idle cursors after an inactivity period (10 minutes) to prevent excess memory use. Set this option to prevent that.
Optional
noOptional
omitOptional
oplogOption to enable an optimized code path for queries looking for a particular range of ts
values in the oplog. Requires tailable
to be true.
Optional
projectionThe fields to return in the query. Object of fields to either include or exclude (one of, not both), {'a':1, 'b': 1}
or {'a': 0, 'b': 0}
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
returnIf true, returns only the index keys in the resulting documents.
Optional
serializeserialize the javascript functions
Optional
sessionSpecify ClientSession for this command
Optional
showDetermines whether to return the record identifier for each document. If true, adds a field $recordId to the returned documents.
Optional
singleDetermines whether to close the cursor after the first batch. Defaults to false.
Optional
skipSet to skip N documents ahead in your query (useful for pagination).
Optional
sortSet to sort the documents coming back from the query. Array of indexes, [['a', 1]]
etc.
Optional
tailableSpecify if the cursor is tailable.
Optional
timeoutSpecify if the cursor can timeout.
Optional
Experimental
timeoutMSSpecifies the time an operation will run until it throws a timeout error
Optional
usewhen deserializing a Long return as a BigInt.
Optional
will
Unused schema definition, deprecated usage, only specify
FindOptions
with no generic