如何在 node.js 中添加生产、开发和测试环境

Question

我想在我的 node.js 项目中添加生产、开发和测试环境我无法理解从哪里开始下面是我的代码我看过很多示例但我无法理解如何根据环境更新。我已将数据库凭据存储在 .env 文件

中

db.config.js

require('dotenv').config()

var config = {
    HOST: process.env.DB_HOST || "127.0.0.1",
    USER: process.env.DB_USER,
    PASSWORD: process.env.DB_PASSWORD,
    DB: process.env.DB_NAME,
    DIALECT: process.env.DB_DIALECT || "postgres"
};
module.exports = config;

models/index.js

const dbConfig = require("../config/db.config");

const Sequelize = require("sequelize");

const sequelize = new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
  host: dbConfig.HOST,
  dialect: dbConfig.DIALECT,
  operatorsAliases: false,

});
const db = {};

db.Sequelize = Sequelize;
db.sequelize = sequelize;

db.user = require("./user")(sequelize, Sequelize);
db.role = require("./role")(sequelize, Sequelize);
db.items = require("./items")(sequelize, Sequelize);

db.role.belongsToMany(db.user, {
  through: "user_roles",
  foreignKey: "roleId",
  otherKey: "userId"
});
db.user.belongsToMany(db.role, {
  through: "user_roles",
  foreignKey: "userId",
  otherKey: "roleId"
});

db.ROLES = ["user", "admin"];

module.exports = db;

app.js

var express = require('express');
var bodyParser = require('body-parser');
var db = require('./models');
const logger = require('morgan');
const cors = require("cors");
var app = express();

db.sequelize.sync({ force: false }).then(() => {
  console.log("Drop and re-sync db.");
});

app.use(cors());
app.use(logger('dev'))

app.use(bodyParser.json({
  type: 'application/vnd.api+json'
})); // parse application/vnd.api+json as json

app.use(bodyParser.json({
  limit: '50mb'
}));

app.use(bodyParser.urlencoded({
  limit: '50mb',
  extended: true,
  parameterLimit: 50000
}));

app.use(function (req, res, next) {
  res.header("Access-Control-Allow-Origin", '*');
  res.header("Access-Control-Allow-Credentials", true);
  res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
  res.header("Access-Control-Allow-Headers", 'Origin,X-Requested-With,Content-Type,Accept,content-type,application/json');
  res.header("Cache-Control", "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0");
  next();
});


app.get('/', function (req, res) {
  res.send('Welcome to Passport with Sequelize');
});

require("./routes/auth.routes.js")(app);
require("./routes/user.routes.js")(app);
require("./routes/items.routes.js")(app);

const PORT = process.env.PORT || 8000;

const server = app.listen(PORT, function(){
  console.log("Listening on port: 8080");
}); 

// app.listen(PORT, () => console.log(`Listening on port: ${PORT}`))

module.exports = server;

Answer 1

在 app.js 所在的同一文件夹中添加另一个名为 config.js 的文件，并在 config.js.

中写入以下代码

var environments = {};
environments.test = {
    'port':3000,
    'envName': 'test'
};
environments.development = {
    'port':5000,
    'envName': 'development'
};
environments.production = {
    'port':8000,
    'envName': 'production'
}

var currentEnvironment = typeof(process.env.NODE_ENV) == 'string' ? process.env.NODE_ENV : '';
var environmentToExport = typeof(environments[currentEnvironment]) == 'object' ? environments[currentEnvironment] : environments.test;

module.exports = environmentToExport;

根据上述文件，每次启动服务器时，如果您提到环境（测试、开发或生产），那么它将检查该环境的端口号和该端口上的运行服务器.例如，localhost:3000 用于测试，localhost:5000 用于开发或 localhost:8000 用于生产。

现在在你的 app.js 文件中修改几行。

var express = require('express');
var bodyParser = require('body-parser');
var db = require('./models');
const logger = require('morgan');
const cors = require("cors");
const config = require('./config');
var app = express();

db.sequelize.sync({ force: false }).then(() => {
    console.log("Drop and re-sync db.");
});

app.use(cors());
app.use(logger('dev'))

app.use(bodyParser.json({
    type: 'application/vnd.api+json'
})); // parse application/vnd.api+json as json

app.use(bodyParser.json({
    limit: '50mb'
}));

app.use(bodyParser.urlencoded({
    limit: '50mb',
    extended: true,
    parameterLimit: 50000
}));

app.use(function (req, res, next) {
    res.header("Access-Control-Allow-Origin", '*');
    res.header("Access-Control-Allow-Credentials", true);
    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
    res.header("Access-Control-Allow-Headers", 'Origin,X-Requested-With,Content-Type,Accept,content-type,application/json');
    res.header("Cache-Control", "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0");
    next();
});


app.get('/', function (req, res) {
    res.send('Welcome to Passport with Sequelize');
});

require("./routes/auth.routes.js")(app);
require("./routes/user.routes.js")(app);
require("./routes/items.routes.js")(app);

const PORT = config.port;

const server = app.listen(PORT, function(){
    console.log("Listening on port: "+PORT + ' in ' + config.envName + ' environment.');
}); 

// app.listen(PORT, () => console.log(`Listening on port: ${PORT}`))

module.exports = server;

现在，您可以运行在不同的环境中应用。命令将是 NODE_ENV=test node app.js 进行测试， NODE_ENV=development node app.js 用于开发和 NODE_ENV=production node app.js 用于生产。如果未提及 NODE_ENV，则应用程序将在默认环境 test

下运行

如何在 node.js 中添加生产、开发和测试环境

How can I add production, development and test environment in node.js

javascript

postgresql

node.js

express

sequelize.js