Typescript应用程序中“已弃用mpromise（猫鼬的默认promise库）”

Question

如何从Typescript应用程序中解决“不建议使用mpromise（猫鼬的默认诺言库）”。

我收到以下错误：

赋值表达式的左侧不能为常量或只读属性。

我正在Angular 2中使用MEAN堆栈，并希望猫鼬使用bluebird promises库。

当我尝试按照Stack Overflow和Mongo上的这些说明进行操作时出现错误

老实说，我不确定我的问题是否只是缺乏Typescript知识，还是我做错了其他事情。

"use strict";

import * as mongoose from 'mongoose';
var dbConst = require('../constants/db.json');
var bluebird = require("bluebird");

export class DBConfig {
    static init():void {
      const URL = (process.env.NODE_ENV === 'production') ? process.env.MONGOHQ_URL
                                                          : dbConst.localhost;

      mongoose.Promise = bluebird;     // <-- THIS IS WHERE ERROR OCCURS
      mongoose.connect(URL);
      mongoose.connection.on('error', console.error.bind(console, 'An error ocurred with the DB connection: '));
    }
};

Answer 1

我相信以下应该起作用：

import * as mongoose from "mongoose";
import * as bluebird from "bluebird";

//either this
(<any>mongoose).Promise = bluebird;

//OR pass it in as an option
const connection = mongoose.createConnection("mongodb://localhost:27017", { 
    promiseLibrary: bluebird
});