Interface CollStatsOptions

return BSON regular expressions as BSONRegExp instances.

Default Value

false

the serializer will check if keys are valid.

Default Value

false

Collation

Comment 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.

Enable utf8 validation when deserializing BSON documents. Defaults to true.

Specifies the verbosity mode for the explain output.

allow to specify if there what fields we wish to return as unserialized raw buffer.

Default Value

null

serialize will not emit undefined fields note that the driver sets this to false

Default Value

true

when deserializing a Binary will return it as a node.js Buffer instance.

Default Value

false

when deserializing a Long will fit it into a Number if it's smaller than 53 bits.

Default Value

true

when deserializing will promote BSON values to their Node.js closest equivalent types.

Default Value

true

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:

Example

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
Copy

Remarks

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.

Specify a read concern and level for the collection. (only MongoDB 3.2 or higher supported)

The preferred read preference (ReadPreference.primary, ReadPreference.primary_preferred, ReadPreference.secondary, ReadPreference.secondary_preferred, ReadPreference.nearest).

Should retry failed writes

serialize the javascript functions

Default Value

false

Specify ClientSession for this command

when deserializing a Long return as a BigInt.

Default Value

false

Write Concern as an object