有人知道这个错误是什么意思吗? 我的应用程序位于 Node.js 上,数据库位于 Atlas 上。当我尝试在 Heroku 上部署它时,我在日志中收到此错误消息:
TypeError: Cannot read property 'split' of null at parseSrvConnectionString (/app/node_modules/mongodb/lib/core/uri_parser.js:40:23) at parseConnectionString (/app/node_modules/mongodb/lib/core/uri_parser.js:556:12) at connect (/app/node_modules/mongodb/lib/operations/connect.js:272:3)
at /app/node_modules/mongodb/lib/mongo_client.js:218:5 at maybePromise (/app/node_modules/mongodb/lib/utils.js:719:3) at MongoClient.connect (/app/node_modules/mongodb/lib/mongo_client.js:214:10) at Function.MongoClient.connect (/app/node_modules/mongodb/lib/mongo_client.js:432:22) at Database.connect (/app/database.js:9:15) at Object. (/app/database.js:21:4) at Module._compile (internal/modules/cjs/loader.js:1118:30) [31m[nodemon] app crashed - waiting for file changes before starting...[39m
数据库.js
const mongo = require('mongodb').MongoClient; require('dotenv').config()
class Database {
constructor() {
this.client = null;
}
connect() {
mongo.connect(process.env.URL_DATABASE, { useNewUrlParser: true, useUnifiedTopology: true }, (err, client) => {
if (err) throw err
this.client = client;
});
} }
const db = new Database(); db.connect(); console.log(db); module.exports = db;
路由器.js
const express = require('express'),
router = express.Router();
const db = require('./database');
const ObjectId = require('mongodb').ObjectID;
// GET ALL
router.get('/books', (req, res, next) => {
const localdb = db.client.db(process.env.DB_NAME);
const collection = localdb.collection(process.env.COLL_BOOKS);
collection.find({}).toArray(function (err, docs) {
if (err) throw err
res.status(200).send(docs);
});
});
// GET ONE
router.get('/books/:name', (req, res, next) => {
let name = req.params.name
const localdb = db.client.db(process.env.DB_NAME);
const collection = localdb.collection(process.env.COLL_BOOKS);
collection.findOne({ "name": name }, function (err, docs) {
if (err) throw err
res.status(200).send(docs);
});
});
// POST ONE
router.post('/books', (req, res, next) => {
const localdb = db.client.db(process.env.DB_NAME);
const collection = localdb.collection(process.env.COLL_BOOKS);
let newBook = req.body;
collection.insertOne(newBook, function (err) {
if (err) throw err
res.status(201).send(true);
});
});
// DELETE ONE
router.delete('/books/:name', (req, res, next) => {
const localdb = db.client.db(process.env.DB_NAME);
const collection = localdb.collection(process.env.COLL_BOOKS);
collection.deleteOne({ "name": req.params.name }, function (err) {
if (err) throw err
res.status(200).send(true)
})
});
// PUT ONE
router.put('/books/:name', (req, res, next) => {
const localdb = db.client.db(process.env.DB_NAME);
const collection = localdb.collection(process.env.COLL_BOOKS);
collection.updateOne({ "name": req.params.name }, { $set: req.body }, function (err) {
if (err) throw err
res.status(201).send(true);
});
});
module.exports = router;
app.js
const express = require('express'),
app = express();
os = require('os');
const bodyParser = require('body-parser');
const cors = require('cors');
const router = require('./router.js')
require('dotenv').config()
app.use(cors());
app.use(bodyParser.json());
app.use('/api/v1', router);
const port = (process.env.PORT || '3001');
let server = app.listen(port, os.hostname(), () => {
let host = server.address().address,
port = server.address().port;
console.log("Example app listening at http://%s:%s", host, port);
});
最佳答案
我遇到了同样的问题,并通过不在 .env 文件中存储 mongo Uri 的完整字符串来解决它。 相反,我只存储了用户和密码
./config.env
DB_USER=youruser
DB_PASS=yourpassword
./app.js
mongoose.connect(`mongodb+srv://${process.env.DB_USER}:${process.env.DB_PASS}@cluster0.pm4ek.gcp.mongodb.net/CommentsDB?retryWrites=true&w=majority`)
关于javascript - 在 Heroku 上部署 Node.js 失败 : TypeError: Cannot read property 'split' of null,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61600109/