OptionalallowOptionalALPNProtocolsAn array of strings or a Buffer naming possible ALPN protocols. (Protocols should be ordered by their priority.)
OptionalappThe name of the application that created this MongoClient instance. MongoDB 3.4 and newer will print this value in the server log upon establishing each connection. It is also recorded in the slow query log and profile collections
OptionalauthThe auth settings for when connection to server.
OptionalauthSpecify the authentication mechanism that MongoDB will use to authenticate the connection.
OptionalauthSpecify properties for the specified authMechanism as a comma-separated list of colon-separated key-value pairs.
OptionalauthSpecify the database name associated with the user’s credentials.
OptionalautoOptionally enable in-use auto encryption
Automatic encryption is an enterprise only feature that only applies to operations on a collection. Automatic encryption is not supported for operations on a database or view, and operations that are not bypassed will result in error (see libmongocrypt: Auto Encryption Allow-List). To bypass automatic encryption for all operations, set bypassAutoEncryption=true in AutoEncryptionOpts.
Automatic encryption requires the authenticated user to have the listCollections privilege action.
If a MongoClient with a limited connection pool size (i.e a non-zero maxPoolSize) is configured with AutoEncryptionOptions, a separate internal MongoClient is created if any of the following are true:
If an internal MongoClient is created, it is configured with the same options as the parent MongoClient except minPoolSize is set to 0 and AutoEncryptionOptions is omitted.
OptionalautoOptionalautoOptionalbsonreturn BSON regular expressions as BSONRegExp instances.
OptionalcaOptionally override the trusted CA certificates. Default is to trust the well-known CAs curated by Mozilla. Mozilla's CAs are completely replaced when CAs are explicitly specified using this option.
OptionalcertCert chains in PEM format. One cert chain should be provided per private key. Each cert chain should consist of the PEM formatted certificate for a provided private key, followed by the PEM formatted intermediate certificates (if any), in order, and not including the root CA (the root CA must be pre-known to the peer, see ca). When providing multiple cert chains, they do not have to be in the same order as their private keys in key. If the intermediate certificates are not provided, the peer will not be able to validate the certificate, and the handshake will fail.
Optionalcheckthe serializer will check if keys are valid.
OptionalcheckVerifies the certificate cert is issued to hostname.
Returns Error object, populating it with reason, host, and cert on
failure. On success, returns undefined.
This function is intended to be used in combination with thecheckServerIdentity option that can be passed to connect and as
such operates on a certificate object. For other purposes, consider using x509.checkHost() instead.
This function can be overwritten by providing an alternative function as the options.checkServerIdentity option that is passed to tls.connect(). The
overwriting function can call tls.checkServerIdentity() of course, to augment
the checks done with additional verification.
This function is only called if the certificate passed all other checks, such as
being issued by trusted CA (options.ca).
Earlier versions of Node.js incorrectly accepted certificates for a givenhostname if a matching uniformResourceIdentifier subject alternative name
was present (see CVE-2021-44531). Applications that wish to acceptuniformResourceIdentifier subject alternative names can use
a custom options.checkServerIdentity function that implements the desired behavior.
The host name or IP address to verify the certificate against.
A certificate object representing the peer's certificate.
OptionalciphersCipher suite specification, replacing the default. For more information, see modifying the default cipher suite. Permitted ciphers can be obtained via tls.getCiphers(). Cipher names must be uppercased in order for OpenSSL to accept them.
OptionalcompressorsAn array or comma-delimited string of compressors to enable network compression for communication between this client and a mongod/mongos instance.
OptionalconnectThe time in milliseconds to attempt a connection before timing out.
OptionalcrlPEM formatted CRLs (Certificate Revocation Lists).
OptionaldirectAllow a driver to force a Single topology type with a connection string containing one host
OptionaldriverAllows a wrapping driver to amend the client metadata generated by the driver to include information about the wrapping driver
OptionalecdhA string describing a named curve or a colon separated list of curve NIDs or names, for example P-521:P-384:P-256, to use for ECDH key agreement. Set to auto to select the curve automatically. Use crypto.getCurves() to obtain a list of available curve names. On recent releases, openssl ecparam -list_curves will also display the name and description of each available elliptic curve. Default: tls.DEFAULT_ECDH_CURVE.
OptionalenableEnable utf8 validation when deserializing BSON documents. Defaults to true.
OptionalfamilyOptionalfieldsallow to specify if there what fields we wish to return as unserialized raw buffer.
OptionalforceForce server to assign _id values instead of driver
OptionalheartbeatheartbeatFrequencyMS controls when the driver checks the state of the MongoDB deployment. Specify the interval (in milliseconds) between checks, counted from the end of the previous check until the beginning of the next one.
OptionalhintsOptionalignoreserialize will not emit undefined fields
note that the driver sets this to false
OptionaljournalThe journal write concern
OptionalkeyPrivate keys in PEM format. PEM allows the option of private keys
being encrypted. Encrypted keys will be decrypted with
options.passphrase. Multiple keys using different algorithms can be
provided either as an array of unencrypted key strings or buffers,
or an array of objects in the form {pem: <string|buffer>[,
passphrase:
OptionalloadInstruct the driver it is connecting to a load balancer fronting a mongos like service
OptionallocalOptionallocalOptionallocalThe size (in milliseconds) of the latency window for selecting among multiple suitable MongoDB instances.
OptionallookupOptionalmaxThe maximum number of connections that may be in the process of being established concurrently by the connection pool.
OptionalmaxThe maximum number of milliseconds that a connection can remain idle in the pool before being removed and closed.
OptionalmaxThe maximum number of connections in the connection pool.
OptionalmaxSpecifies, in seconds, how stale a secondary can be before the client stops using it for read operations.
OptionalminDHSizeOptionalminSets the minimum heartbeat frequency. In the event that the driver has to frequently re-check a server's availability, it will wait at least this long since the previous check to avoid wasted effort.
OptionalminThe minimum number of connections in the connection pool.
OptionalmonitorEnable command monitoring for this client
OptionalnoTCP Connection no delay
OptionalpassphraseShared passphrase used for a single private key and/or a PFX.
OptionalpfxPFX or PKCS12 encoded private key and certificate chain. pfx is an
alternative to providing key and cert individually. PFX is usually
encrypted, if it is, passphrase will be used to decrypt it. Multiple
PFX can be provided either as an array of unencrypted PFX buffers,
or an array of objects in the form {buf: <string|buffer>[,
passphrase:
OptionalpkA primary key factory function for generation of custom _id keys
Optionalpromotewhen deserializing a Binary will return it as a node.js Buffer instance.
Optionalpromotewhen deserializing a Long will fit it into a Number if it's smaller than 53 bits.
Optionalpromotewhen deserializing will promote BSON values to their Node.js closest equivalent types.
OptionalproxyConfigures a Socks5 proxy host used for creating TCP connections.
OptionalproxyConfigures a Socks5 proxy password when the proxy in proxyHost requires username/password authentication.
OptionalproxyConfigures a Socks5 proxy port used for creating TCP connections.
OptionalproxyConfigures a Socks5 proxy username when the proxy in proxyHost requires username/password authentication.
OptionalrawEnabling 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.
OptionalreadSpecify a read concern for the collection (only MongoDB 3.2 or higher supported)
OptionalreadThe level of isolation
OptionalreadSpecifies the read preferences for this connection
OptionalreadSpecifies the tags document as a comma-separated list of colon-separated key-value pairs.
OptionalrejectIf true the server will reject any connection which is not authorized with the list of supplied CAs. This option only has an effect if requestCert is true.
OptionalreplicaSpecifies the name of the replica set, if the mongod is a member of a replica set.
OptionalretryEnables retryable reads.
OptionalretryEnable retryable writes.
OptionalsecureAn optional TLS context object from tls.createSecureContext()
OptionalsecureLegacy mechanism to select the TLS protocol version to use, it does not support independent control of the minimum and maximum version, and does not support limiting the protocol to TLSv1.3. Use minVersion and maxVersion instead. The possible values are listed as SSL_METHODS, use the function names as strings. For example, use 'TLSv1_1_method' to force TLS version 1.1, or 'TLS_method' to allow any TLS protocol version up to TLSv1.3. It is not recommended to use TLS versions less than 1.2, but it may be required for interoperability. Default: none, see minVersion.
Optionalserializeserialize the javascript functions
OptionalserverServer API version
OptionalserverInstructs the driver monitors to use a specific monitoring mode
OptionalservernameOptionalserverSpecifies how long (in milliseconds) to block for server selection before throwing an exception.
OptionalsessionAn optional Buffer instance containing a TLS session.
OptionalsocketThe time in milliseconds to attempt a send or receive on a socket before the attempt times out.
OptionalsrvThe maximum number of hosts to connect to when using an srv connection string, a setting of 0 means unlimited hosts
OptionalsrvModifies the srv URI to look like:
_{srvServiceName}._tcp.{hostname}.{domainname}
Querying this DNS URI is expected to respond with SRV records
OptionalsslA boolean to enable or disables TLS/SSL for the connection. (The ssl option is equivalent to the tls option.)
OptionaltlsEnables or disables TLS/SSL for the connection.
OptionaltlsBypasses validation of the certificates presented by the mongod/mongos instance
OptionaltlsDisables hostname validation of the certificate presented by the mongod/mongos instance.
OptionaltlsCAFileSpecifies the location of a local .pem file that contains the root certificate chain from the Certificate Authority. This file is used to validate the certificate presented by the mongod/mongos instance.
OptionaltlsSpecifies the location of a local .pem file that contains either the client's TLS/SSL certificate and key.
OptionaltlsSpecifies the password to de-crypt the tlsCertificateKeyFile.
OptionaltlsCRLFileSpecifies the location of a local CRL .pem file that contains the client revokation list.
OptionaltlsDisables various certificate validations.
Optionalusewhen deserializing a Long return as a BigInt.
OptionalwThe write concern w value
OptionalwaitThe maximum time in milliseconds that a thread can wait for a connection to become available.
OptionalwriteA MongoDB WriteConcern, which describes the level of acknowledgement requested from MongoDB for write operations.
OptionalwtimeoutMSThe write concern timeout
OptionalzlibAn integer that specifies the compression level if using zlib for network compression.
Describes all possible URI query options for the mongo client
See
https://www.mongodb.com/docs/manual/reference/connection-string