ES6导入在.env导入之前发生

Question

尝试使用我的dotenv文件中的环境变量会崩溃我的应用程序,因为似乎没有及时加载dotenv文件.

// server.js
require('dotenv').config({ silent: process.env.NODE_ENV === 'production' })
console.log("Here is the env var: ", process.env.SPARKPOST_API_KEY) // works
import express from 'express'
import routes from './routes'
(...)
app.use('/api', routes);

// routes/index.js
import somecontroller from '../controllers/somecontroller'
const routes = express.Router()
routes.use('/somecontroller', somecontroller)

// somecontroller.js
import sendEmail from '../helpers/sparkpost'

// ./helpers/sparkpost.js
import SparkPost from 'sparkpost'
var sparky = new SparkPost()  // uses process.env.SPARKPOST_API_KEY
export default function sendEmail() {
}

崩溃有错误

Error: Client requires an API Key.

API密钥就在那里,所以似乎sparkpost.js new SparkPost()在dotenv文件加载之前进行实例化.

我该如何解决这个问题？

Answer 1

Javascript import被提升,因此导入的模块将在任何当前模块初始化代码运行之前初始化.幸运的是,导入的模块按顺序初始化,因此可能的解决方法是将配置代码放在自己的模块中:

// main.js <- make this your entry point
import "./config";
import "./server";

// config.js
import dotenv from "dotenv";
dotenv.config({ silent: process.env.NODE_ENV === 'production' });

// server.js
import express from 'express';
import SparkPost from 'sparkpost';
const sparky = new SparkPost();
...

编辑:

更简单:

// config.js
import dotenv from "dotenv";
dotenv.config({ silent: process.env.NODE_ENV === 'production' });

// server.js <- make this your entry point
import './config';
import express from 'express';
import SparkPost from 'sparkpost';
const sparky = new SparkPost();
...