"mpromise (mongoose's default promise library) is deprecated" 测试时出错

Question

一段时间以来我一直收到此错误，我决定今天修复它，但在尝试修复一个小时后我找到了解决方案。

当我测试我的猫鼬用户模型时，生成了这个 error/warning：

Mongoose: mpromise (mongoose's default promise library) is deprecated, plug in your own promise library instead: http://mongoosejs.com/docs/promises.html

这是我的测试：

  1 var assert = require('chai').assert;
  2 var mongoose = require('mongoose');
  3 var clearDB = require('mocha-mongoose')(require('../../config/database').uri, { skip: ['workouts'] });
  4 var database = require('../../config/database').connect;
  5
  6 var User = require('../../app/models/user');
  7 var user = new User({});
  8
  9 var req_body = {
 10   username: "garyvee",
 11   email: "gary@vaynermedia.com",
 12   password: "secret"
 13 };
 14
 15 describe('User', function() {
 16   beforeEach(function(done) {
 17     user.username = "johnsmith";
 18     user.email = "john@gmail.com";
 19     user.password = "secret";
 20     done();
 21   });
 22
 23   it('can be saved', function() {
 24     return user.save(function(err: any) {
 25       assert.isNull(err);
 26     })
 27   });
 28 });

我认为这与 .save 有关，但我不知道如何解决。有人可以帮助我并告诉我如何修复它以便不显示 error/warning。

Answer 1

您需要插入一个 promise 库（q、bluebird、es6 之一...）

mongoose.Promise = require('bluebird');

Answer 2

下面是一个可能有帮助的示例。使用 es6 模块（而不是 CommonJS require）这对我有用：

// mongoose's Promise library is deprecated, using es6's: 
import es6Promise from 'es6-promise';
mongoose.Promise = es6Promise.Promise;

Answer 3

你可以参考 How to use mongoose Promise - mongo

页面内容：

On this page:http://mongoosejs.com/docs/promises.html

The title is Plugging in your own Promises Library

Answer 4

从节点 4.x 你可以只使用 ES6 承诺：

const mongoose = require('mongoose');
mongoose.Promise = Promise;

"mpromise (mongoose's default promise library) is deprecated" 测试时出错

"mpromise (mongoose's default promise library) is deprecated" error when testing

mocha.js

mongoose

mongodb

node.js