无法使用 node.js 和 Heroku 连接 MongoLab 数据库 URl

Question

我无法连接到 MongoLAB 中的 MongoDB。我有一个MEAN 应用程序，我已经部署在heroku 中。当我尝试连接数据库但无法连接时。日志如下。

Disconnected from log stream. There may be events happening that you do not see here! Attempting to reconnect...

2017-07-31T11:46:48.243603+00:00 app[web.1]:     at module.exports (/app/node_modules/mongodb/lib/url_parser.js:59:13)

2017-07-31T11:46:48.243605+00:00 app[web.1]:     at Function.MongoClient.connect (/app/node_modules/mongodb/lib/mongo_client.js:113:3)

2017-07-31T11:46:48.243604+00:00 app[web.1]:     at connect (/app/node_modules/mongodb/lib/mongo_client.js:289:16)

2017-07-31T11:46:48.243606+00:00 app[web.1]:     at run (/app/node_modules/thunky/index.js:13:3)

2017-07-31T11:46:48.243606+00:00 app[web.1]:     at /app/node_modules/mongojs/lib/database.js:29:15

2017-07-31T11:46:48.243607+00:00 app[web.1]:     at Collection._getConnection (/app/node_modules/thunky/index.js:27:3)

2017-07-31T11:46:48.243608+00:00 app[web.1]:     at Collection._getCollection (/app/node_modules/mongojs/lib/collection.js:17:10)

2017-07-31T11:46:48.243609+00:00 app[web.1]:     at getCursor (/app/node_modules/mongojs/lib/collection.js:32:10)

2017-07-31T11:46:48.243610+00:00 app[web.1]:     at run (/app/node_modules/thunky/index.js:13:3)

2017-07-31T11:46:48.243609+00:00 app[web.1]:     at /app/node_modules/mongojs/lib/cursor.js:12:5

2017-07-31T11:46:48.244240+00:00 app[web.1]: [0mPOST /login [31m500 [0m30.134 ms - 22[0m

Disconnected from log stream. There may be events happening that you do not see here! Attempting to reconnect...

我的代码如下：

var mongoJs=require('mongojs');
var CryptoJS = require("crypto-js");
var database='FGDP';
var collections=['f_users'];
var MONGOLAB_URI="mongodb://username:password@ds127153.mlab.com:27153/fgdp";
var db=mongoJs(MONGOLAB_URI, collections);
var ses;
exports.userlogin=function(req,res){
    var username=req.body.user_name;
    var password=req.body.user_pass;
   // console.log('pass'+typeof(password));
    //var ciphertext = CryptoJS.AES.encrypt(password, 'lexelPass');
    //var pass=ciphertext.toString();
    db.f_users.findOne({'login_name':username},function(err,docs){
        console.log('err',err);
        if(!err){
            if(docs){
                var pass=docs.password;
                var bytes = CryptoJS.AES.decrypt(pass.toString(), 'lexelPass');
                var plaintext = bytes.toString(CryptoJS.enc.Utf8);
                if(plaintext==password){
                   req.session.email=docs.email;
                   req.session.name=docs.name;
                   req.session.login_name=docs.login_name;
                   req.session.status=docs.status;
                   req.session.user_type=docs.user_type;
                   res.send(docs); 
                }else{
                   res.send("Login failed");
                }
            }
        }
        if(err){
            res.send("Login failed");
        }
    })
}

该数据库和集合存在于 mongoLAB 中。我需要通过 mongojs 连接它。实际上我有一个登录应用程序，但我无法登录。

Answer 1

你应该这样做

var db = mongoJs(MONGOLAB_URI);
db.on('connect', function () {
    console.log('database connected')
});