chore(promises): removed support for custom promise libraries

docs/promises.md

@@ -50,17 +50,6 @@ better stack traces.
 [require:Should You Use `exec\(\)` With `await`]
 ```
 
-### Plugging in your own Promises Library
-
-If you're an advanced user, you may want to plug in your own promise
-library like [bluebird](https://www.npmjs.com/package/bluebird). Just set
-`mongoose.Promise` to your favorite
-ES6-style promise constructor and mongoose will use it.
-
-```javascript
-[require:Plugging in your own Promises Library]
-```
-
 <i>
   Want to learn how to check whether your favorite npm modules work with
   async/await without cobbling together contradictory answers from Google

index.js

@@ -35,7 +35,6 @@ module.exports.SchemaTypes = mongoose.SchemaTypes;
 module.exports.VirtualType = mongoose.VirtualType;
 module.exports.Types = mongoose.Types;
 module.exports.Query = mongoose.Query;
-module.exports.Promise = mongoose.Promise;
 module.exports.Model = mongoose.Model;
 module.exports.Document = mongoose.Document;
 module.exports.ObjectId = mongoose.ObjectId;

lib/browser.js

@@ -5,35 +5,9 @@
 require('./driver').set(require('./drivers/browser'));
 
 const DocumentProvider = require('./document_provider.js');
-const PromiseProvider = require('./promise_provider');
 
 DocumentProvider.setBrowser(true);
 
-/**
- * The Mongoose [Promise](#promise_Promise) constructor.
- *
- * @method Promise
- * @api public
- */
-
-Object.defineProperty(exports, 'Promise', {
-  get: function() {
-    return PromiseProvider.get();
-  },
-  set: function(lib) {
-    PromiseProvider.set(lib);
-  }
-});
-
-/**
- * Storage layer for mongoose promises
- *
- * @method PromiseProvider
- * @api public
- */
-
-exports.PromiseProvider = PromiseProvider;
-
 /**
  * The [MongooseError](#error_MongooseError) constructor.
  *

lib/connection.js

@@ -11,7 +11,6 @@ const STATES = require('./connectionstate');
 const MongooseError = require('./error/index');
 const DisconnectedError = require('./error/disconnected');
 const SyncIndexesError = require('./error/syncIndexes');
-const PromiseProvider = require('./promise_provider');
 const ServerSelectionError = require('./error/serverSelection');
 const applyPlugins = require('./helpers/schema/applyPlugins');
 const clone = require('./helpers/clone');
@@ -736,7 +735,6 @@ Connection.prototype.openUri = function(uri, options, callback) {
   this.readyState = STATES.connecting;
   this._closeCalled = false;
 
-  const Promise = PromiseProvider.get();
   const _this = this;
 
   options = processConnectionOptions(uri, options);

lib/helpers/promiseOrCallback.js

@@ -1,6 +1,5 @@
 'use strict';
 
-const PromiseProvider = require('../promise_provider');
 const immediate = require('./immediate');
 
 const emittedSymbol = Symbol('mongoose:emitted');
@@ -35,7 +34,7 @@ module.exports = function promiseOrCallback(callback, fn, ee, Promise) {
     }
   }
 
-  Promise = Promise || PromiseProvider.get();
+  Promise = Promise || global.Promise;
 
   return new Promise((resolve, reject) => {
     fn(function(error, res) {

lib/index.js

@@ -28,7 +28,6 @@ const pkg = require('../package.json');
 const cast = require('./cast');
 
 const Aggregate = require('./aggregate');
-const PromiseProvider = require('./promise_provider');
 const trusted = require('./helpers/query/trusted').trusted;
 const sanitizeFilter = require('./helpers/query/sanitizeFilter');
 const isBsonType = require('./helpers/isBsonType');
@@ -971,33 +970,6 @@ Mongoose.prototype.Types = Types;
 
 Mongoose.prototype.Query = Query;
 
-/**
- * The Mongoose [Promise](#promise_Promise) constructor.
- *
- * @memberOf Mongoose
- * @instance
- * @property Promise
- * @api public
- */
-
-Object.defineProperty(Mongoose.prototype, 'Promise', {
-  get: function() {
-    return PromiseProvider.get();
-  },
-  set: function(lib) {
-    PromiseProvider.set(lib);
-  }
-});
-
-/**
- * Storage layer for mongoose promises
- *
- * @method PromiseProvider
- * @api public
- */
-
-Mongoose.prototype.PromiseProvider = PromiseProvider;
-
 /**
  * The Mongoose [Model](#model_Model) constructor.
  *

lib/model.js

@@ -13,7 +13,6 @@ const EventEmitter = require('events').EventEmitter;
 const MongooseBuffer = require('./types/buffer');
 const MongooseError = require('./error/index');
 const OverwriteModelError = require('./error/overwriteModel');
-const PromiseProvider = require('./promise_provider');
 const Query = require('./query');
 const RemoveOptions = require('./options/removeOptions');
 const SaveOptions = require('./options/saveOptions');
@@ -1350,7 +1349,6 @@ Model.init = function init(callback) {
     return this.$init;
   }
 
-  const Promise = PromiseProvider.get();
   const autoIndex = utils.getOption('autoIndex',
     this.schema.options, this.db.config, this.db.base.options);
   const autoCreate = utils.getOption('autoCreate',

package.json

@@ -39,7 +39,6 @@
     "axios": "1.1.3",
     "babel-loader": "8.2.5",
     "benchmark": "2.1.4",
-    "bluebird": "3.7.2",
     "buffer": "^5.6.0",
     "cheerio": "1.0.0-rc.12",
     "crypto-browserify": "3.12.0",

test/aggregate.test.js

@@ -834,7 +834,7 @@ describe('aggregate: ', function() {
         const agg = new Aggregate([], db.model('Employee'));
 
         const promise = agg.exec();
-        assert.ok(promise instanceof mongoose.Promise);
+        assert.ok(promise instanceof Promise);
 
         return promise.catch(error => {
           assert.ok(error);

test/connection.test.js

@@ -6,7 +6,6 @@
 
 const start = require('./common');
 
-const Promise = require('bluebird');
 const Q = require('q');
 const assert = require('assert');
 const sinon = require('sinon');
@@ -1506,7 +1505,7 @@ describe('connections:', function() {
 
     const [res] = await Promise.all([
       Test.findOne().exec(),
-      new Promise.resolve(resolve => setTimeout(resolve, 100)).then(() => {
+      Promise.resolve(resolve => setTimeout(resolve, 100)).then(() => {
         conn.client.emit('serverDescriptionChanged', { newDescription: { type: 'Single' } });
       })
     ]);

test/docs/promises.test.js

@@ -21,8 +21,6 @@ describe('promises docs', function () {
   });
 
   after(async function () {
-    mongoose.Promise = global.Promise;
-
     await db.close();
   });
 
@@ -154,34 +152,4 @@ describe('promises docs', function () {
       // acquit:ignore:end
     }
   });
-
-  /**
-   * If you're an advanced user, you may want to plug in your own promise
-   * library like [bluebird](https://www.npmjs.com/package/bluebird). Just set
-   * `mongoose.Promise` to your favorite
-   * ES6-style promise constructor and mongoose will use it.
-   */
-  it('Plugging in your own Promises Library', function (done) {
-    // acquit:ignore:start
-    if (!global.Promise) {
-      return done();
-    }
-    // acquit:ignore:end
-    // Use bluebird
-    mongoose.Promise = require('bluebird');
-    const bluebirdPromise = Band.findOne({name: "Guns N' Roses"}).exec();
-    assert.equal(bluebirdPromise.constructor, require('bluebird'));
-
-    // Use q. Note that you **must** use `require('q').Promise`.
-    mongoose.Promise = require('q').Promise;
-    const qPromise = Band.findOne({name: "Guns N' Roses"}).exec();
-    assert.ok(qPromise instanceof require('q').makePromise);
-
-    // acquit:ignore:start
-    // Wait for promises
-    bluebirdPromise.then(qPromise).then(function () {
-      done();
-    });
-    // acquit:ignore:end
-  });
 });

test/docs/validation.test.js

@@ -3,8 +3,6 @@ const assert = require('assert');
 const mongoose = require('../../');
 const start = require('../common');
 
-const Promise = global.Promise || require('bluebird');
-
 describe('validation docs', function() {
   let db;
   const Schema = mongoose.Schema;

test/document.test.js

@@ -4113,8 +4113,6 @@ describe('document', function() {
     });
 
     it('supports $where in pre save hook (gh-4004)', function(done) {
-      const Promise = global.Promise;
-
       const schema = new Schema({
         name: String
       }, { timestamps: true, versionKey: null });

test/index.test.js

@@ -820,7 +820,6 @@ describe('mongoose module:', function() {
       assert.ok(mongoose.Schema.Types);
       assert.equal(typeof mongoose.SchemaType, 'function');
       assert.equal(typeof mongoose.Query, 'function');
-      assert.equal(typeof mongoose.Promise, 'function');
       assert.equal(typeof mongoose.Model, 'function');
       assert.equal(typeof mongoose.Document, 'function');
       assert.equal(typeof mongoose.Error, 'function');

test/model.aggregate.test.js

@@ -102,7 +102,7 @@ describe('model aggregate', function() {
 
       const res = await promise;
 
-      assert.ok(promise instanceof mongoose.Promise);
+      assert.ok(promise instanceof Promise);
       assert.ok(res);
       assert.equal(res.length, 1);
       assert.ok('maxAge' in res[0]);

test/model.create.test.js

@@ -73,7 +73,7 @@ describe('model', function() {
 
     it('returns a promise', function() {
       const p = B.create({ title: 'returns promise' });
-      assert.ok(p instanceof mongoose.Promise);
+      assert.ok(p instanceof Promise);
     });
 
     it('creates in parallel', async function() {

test/model.indexes.test.js

@@ -391,7 +391,7 @@ describe('model', function() {
         const schema = mongoose.Schema({ x: 'string' });
         const Test = mongoose.createConnection().model('ensureIndexes-' + random, schema);
         const p = Test.ensureIndexes();
-        assert.ok(p instanceof mongoose.Promise);
+        assert.ok(p instanceof Promise);
       });
 
       it('creates indexes', async function() {

test/model.mapreduce.test.js

@@ -191,7 +191,7 @@ describe('model: mapreduce:', function() {
       };
 
       const promise = MR.mapReduce(o);
-      assert.ok(promise instanceof mongoose.Promise);
+      assert.ok(promise instanceof Promise);
     });
   });
 

test/model.populate.test.js

@@ -2429,7 +2429,7 @@ describe('model: populate:', function() {
 
     it('returns a promise', function(done) {
       const p = B.populate(post1, '_creator');
-      assert.ok(p instanceof mongoose.Promise);
+      assert.ok(p instanceof Promise);
       p.then(success, done);
       function success(doc) {
         assert.ok(doc);