feat!: remove top-level write concern options (#2642)

WriteConcern options are no longer accepted 
spread across the top-level options object they must
be provided as in a sub-object under the writeConcern key.

NODE-1722

src/bulk/common.ts

@@ -1084,7 +1084,7 @@ export abstract class BulkOperationBase {
    * bulkOp.find({ h: 8 }).delete();
    *
    * // Add a replaceOne
-   * bulkOp.find({ i: 9 }).replaceOne({ j: 10 });
+   * bulkOp.find({ i: 9 }).replaceOne({writeConcern: { j: 10 }});
    *
    * // Update using a pipeline (requires Mongodb 4.2 or higher)
    * bulk.find({ k: 11, y: { $exists: true }, z: { $exists: true } }).updateOne([

src/connection_string.ts

@@ -1199,8 +1199,10 @@ export const OPTIONS = {
     target: 'writeConcern',
     transform({ name, options, values: [value] }): WriteConcern {
       const wc = WriteConcern.fromOptions({
-        ...options.writeConcern,
-        fsync: getBoolean(name, value)
+        writeConcern: {
+          ...options.writeConcern,
+          fsync: getBoolean(name, value)
+        }
       });
       if (!wc) throw new TypeError(`Unable to make a writeConcern from fsync=${value}`);
       return wc;
@@ -1216,10 +1218,11 @@ export const OPTIONS = {
   j: {
     target: 'writeConcern',
     transform({ name, options, values: [value] }): WriteConcern {
-      console.warn('j is deprecated');
       const wc = WriteConcern.fromOptions({
-        ...options.writeConcern,
-        journal: getBoolean(name, value)
+        writeConcern: {
+          ...options.writeConcern,
+          journal: getBoolean(name, value)
+        }
       });
       if (!wc) throw new TypeError(`Unable to make a writeConcern from journal=${value}`);
       return wc;
@@ -1229,8 +1232,10 @@ export const OPTIONS = {
     target: 'writeConcern',
     transform({ name, options, values: [value] }): WriteConcern {
       const wc = WriteConcern.fromOptions({
-        ...options.writeConcern,
-        journal: getBoolean(name, value)
+        writeConcern: {
+          ...options.writeConcern,
+          journal: getBoolean(name, value)
+        }
       });
       if (!wc) throw new TypeError(`Unable to make a writeConcern from journal=${value}`);
       return wc;
@@ -1516,7 +1521,7 @@ export const OPTIONS = {
   w: {
     target: 'writeConcern',
     transform({ values: [value], options }) {
-      return WriteConcern.fromOptions({ ...options.writeConcern, w: value as W });
+      return WriteConcern.fromOptions({ writeConcern: { ...options.writeConcern, w: value as W } });
     }
   },
   waitQueueTimeoutMS: {
@@ -1528,8 +1533,10 @@ export const OPTIONS = {
     transform({ values: [value], options }) {
       if (isRecord(value) || value instanceof WriteConcern) {
         return WriteConcern.fromOptions({
-          ...options.writeConcern,
-          ...value
+          writeConcern: {
+            ...options.writeConcern,
+            ...value
+          }
         });
       }
 
@@ -1540,8 +1547,10 @@ export const OPTIONS = {
     target: 'writeConcern',
     transform({ values: [value], options }) {
       const wc = WriteConcern.fromOptions({
-        ...options.writeConcern,
-        wtimeout: getUint('wtimeout', value)
+        writeConcern: {
+          ...options.writeConcern,
+          wtimeout: getUint('wtimeout', value)
+        }
       });
       if (wc) return wc;
       throw new MongoParseError(`Cannot make WriteConcern from wtimeout`);
@@ -1551,8 +1560,10 @@ export const OPTIONS = {
     target: 'writeConcern',
     transform({ values: [value], options }) {
       const wc = WriteConcern.fromOptions({
-        ...options.writeConcern,
-        wtimeoutMS: getUint('wtimeoutMS', value)
+        writeConcern: {
+          ...options.writeConcern,
+          wtimeoutMS: getUint('wtimeoutMS', value)
+        }
       });
       if (wc) return wc;
       throw new MongoParseError(`Cannot make WriteConcern from wtimeout`);

src/db.ts

@@ -55,10 +55,7 @@ import type { Admin } from './admin';
 
 // Allowed parameters
 const legalOptionNames = [
-  'w',
-  'wtimeout',
-  'fsync',
-  'j',
+  'writeConcern',
   'readPreference',
   'readPreferenceTags',
   'native_parser',

src/gridfs-stream/upload.ts

@@ -515,9 +515,11 @@ function doWrite(
 function getWriteOptions(stream: GridFSBucketWriteStream): WriteConcernOptions {
   const obj: WriteConcernOptions = {};
   if (stream.writeConcern) {
-    obj.w = stream.writeConcern.w;
-    obj.wtimeout = stream.writeConcern.wtimeout;
-    obj.j = stream.writeConcern.j;
+    obj.writeConcern = {
+      w: stream.writeConcern.w,
+      wtimeout: stream.writeConcern.wtimeout,
+      j: stream.writeConcern.j
+    };
   }
   return obj;
 }

src/index.ts

@@ -298,7 +298,7 @@ export type {
   InterruptibleAsyncInterval,
   BufferPool
 } from './utils';
-export type { WriteConcern, W, WriteConcernOptions } from './write_concern';
+export type { WriteConcern, W, WriteConcernOptions, WriteConcernSettings } from './write_concern';
 export type { ExecutionResult } from './operations/execute_operation';
 export type { InternalAbstractCursorOptions } from './cursor/abstract_cursor';
 export type {

src/mongo_client.ts

@@ -3,7 +3,7 @@ import { EventEmitter } from 'events';
 import { ChangeStream, ChangeStreamOptions } from './change_stream';
 import { ReadPreference, ReadPreferenceModeId } from './read_preference';
 import { MongoError, AnyError } from './error';
-import { WriteConcern, WriteConcernOptions } from './write_concern';
+import { WriteConcern, W, WriteConcernSettings } from './write_concern';
 import { maybePromise, MongoDBNamespace, Callback, resolveOptions } from './utils';
 import { deprecate } from 'util';
 import { connect, validOptions } from './operations/connect';
@@ -60,7 +60,7 @@ type CleanUpHandlerFunction = (err?: AnyError, result?: any, opts?: any) => Prom
  * @public
  * @see https://docs.mongodb.com/manual/reference/connection-string
  */
-export interface MongoURIOptions extends Pick<WriteConcernOptions, 'journal' | 'w' | 'wtimeoutMS'> {
+export interface MongoURIOptions {
   /** Specifies the name of the replica set, if the mongod is a member of a replica set. */
   replicaSet?: string;
   /** Enables or disables TLS/SSL for the connection. */
@@ -134,13 +134,19 @@ export interface MongoURIOptions extends Pick<WriteConcernOptions, 'journal' | '
   // username and password in Authority section not query string.
   username?: string;
   password?: string;
+
+  // remove in NODE-2704
+  fsync?: boolean;
+  w?: W;
+  j?: boolean;
+  journal?: boolean;
+  wtimeout?: number;
+  wtimeoutMS?: number;
+  writeConcern?: WriteConcern | WriteConcernSettings;
 }
 
 /** @public */
-export interface MongoClientOptions
-  extends WriteConcernOptions,
-    MongoURIOptions,
-    BSONSerializeOptions {
+export interface MongoClientOptions extends MongoURIOptions, BSONSerializeOptions {
   /** Validate mongod server certificate against Certificate Authority */
   sslValidate?: boolean;
   /** SSL Certificate store binary buffer. */

src/operations/connect.ts

@@ -14,6 +14,7 @@ import type { MongoClient } from '../mongo_client';
 import { ConnectionOptions, Connection } from '../cmap/connection';
 import { AuthMechanism, AuthMechanismId } from '../cmap/auth/defaultAuthProviders';
 import { Server } from '../sdam/server';
+import { WRITE_CONCERN_KEYS } from '../write_concern';
 
 const validOptionNames = [
   'poolSize',
@@ -40,9 +41,7 @@ const validOptionNames = [
   'acceptableLatencyMS',
   'connectWithNoPrimary',
   'authSource',
-  'w',
-  'wtimeout',
-  'j',
+  'writeConcern',
   'forceServerObjectId',
   'serializeFunctions',
   'ignoreUndefined',
@@ -68,7 +67,6 @@ const validOptionNames = [
   'password',
   'authMechanism',
   'compression',
-  'fsync',
   'readPreferenceTags',
   'numberOfRetries',
   'auto_reconnect',
@@ -216,12 +214,6 @@ export function connect(
       delete finalOptions.db_options.auth;
     }
 
-    // `journal` should be translated to `j` for the driver
-    if (finalOptions.journal != null) {
-      finalOptions.j = finalOptions.journal;
-      finalOptions.journal = undefined;
-    }
-
     // resolve tls options if needed
     resolveTLSOptions(finalOptions);
 
@@ -412,7 +404,9 @@ function createUnifiedOptions(finalOptions: any, options: any) {
   const noMerge = ['readconcern', 'compression', 'autoencryption'];
 
   for (const name in options) {
-    if (noMerge.indexOf(name.toLowerCase()) !== -1) {
+    if (name === 'writeConcern') {
+      finalOptions[name] = { ...finalOptions[name], ...options[name] };
+    } else if (noMerge.indexOf(name.toLowerCase()) !== -1) {
       finalOptions[name] = options[name];
     } else if (childOptions.indexOf(name.toLowerCase()) !== -1) {
       finalOptions = mergeOptions(finalOptions, options[name], false);
@@ -551,12 +545,23 @@ function transformUrlOptions(connStrOptions: any) {
 
   if (connStrOpts.wTimeoutMS) {
     connStrOpts.wtimeout = connStrOpts.wTimeoutMS;
+    connStrOpts.wTimeoutMS = undefined;
   }
 
   if (connStrOptions.srvHost) {
     connStrOpts.srvHost = connStrOptions.srvHost;
   }
 
+  // Any write concern options from the URL will be top-level, so we manually
+  // move them options under `object.writeConcern`
+  for (const key of WRITE_CONCERN_KEYS) {
+    if (connStrOpts[key] !== undefined) {
+      if (connStrOpts.writeConcern === undefined) connStrOpts.writeConcern = {};
+      connStrOpts.writeConcern[key] = connStrOpts[key];
+      connStrOpts[key] = undefined;
+    }
+  }
+
   return connStrOpts;
 }
 

src/operations/map_reduce.ts

@@ -24,9 +24,6 @@ const exclusionList = [
   'readConcern',
   'session',
   'bypassDocumentValidation',
-  'w',
-  'wtimeout',
-  'j',
   'writeConcern',
   'raw',
   'fieldsAsRaw',

src/write_concern.ts

@@ -3,6 +3,12 @@ export type W = number | 'majority';
 
 /** @public */
 export interface WriteConcernOptions {
+  /** Write Concern as an object */
+  writeConcern?: WriteConcern | WriteConcernSettings;
+}
+
+/** @public */
+export interface WriteConcernSettings {
   /** The write concern */
   w?: W;
   /** The write concern timeout */
@@ -15,10 +21,10 @@ export interface WriteConcernOptions {
   journal?: boolean;
   /** The file sync write concern */
   fsync?: boolean | 1;
-  /** Write Concern as an object */
-  writeConcern?: WriteConcernOptions | WriteConcern | W;
 }
 
+export const WRITE_CONCERN_KEYS = ['w', 'wtimeout', 'j', 'journal', 'fsync'];
+
 /**
  * A MongoDB WriteConcern, which describes the level of acknowledgement
  * requested from MongoDB for write operations.
@@ -64,19 +70,17 @@ export class WriteConcern {
 
   /** Construct a WriteConcern given an options object. */
   static fromOptions(
-    options?: WriteConcernOptions | WriteConcern | W,
+    options?: WriteConcernOptions | WriteConcern,
     inherit?: WriteConcernOptions | WriteConcern
   ): WriteConcern | undefined {
-    const { fromOptions } = WriteConcern;
     if (typeof options === 'undefined') return undefined;
-    if (typeof options === 'number') return fromOptions({ ...inherit, w: options });
-    if (typeof options === 'string') return fromOptions({ ...inherit, w: options });
-    if (options instanceof WriteConcern) return fromOptions({ ...inherit, ...options });
-    if (options.writeConcern) {
-      const { writeConcern, ...viable } = { ...inherit, ...options };
-      return fromOptions(writeConcern, viable);
-    }
-    const { w, wtimeout, j, fsync, journal, wtimeoutMS } = { ...inherit, ...options };
+    inherit = inherit ?? {};
+    const opts: WriteConcern | WriteConcernSettings | undefined =
+      options instanceof WriteConcern ? options : options.writeConcern;
+    const parentOpts: WriteConcern | WriteConcernSettings | undefined =
+      inherit instanceof WriteConcern ? inherit : inherit.writeConcern;
+
+    const { w, wtimeout, j, fsync, journal, wtimeoutMS } = { ...parentOpts, ...opts };
     if (
       w != null ||
       wtimeout != null ||

test/examples/transactions.js

@@ -234,9 +234,15 @@ describe('examples(transactions):', function () {
 
       // Prereq: Create collections.
 
-      await client.db('mydb1').collection('foo').insertOne({ abc: 0 }, { w: 'majority' });
-
-      await client.db('mydb2').collection('bar').insertOne({ xyz: 0 }, { w: 'majority' });
+      await client
+        .db('mydb1')
+        .collection('foo')
+        .insertOne({ abc: 0 }, { writeConcern: { w: 'majority' } });
+
+      await client
+        .db('mydb2')
+        .collection('bar')
+        .insertOne({ xyz: 0 }, { writeConcern: { w: 'majority' } });
 
       // Step 1: Start a Client Session
       const session = client.startSession();