未处理的拒绝MongoError:无法连接到MongoDB中的服务器

Question

当我运行我的Unhandled rejection MongoError: cannot connect to server项目时，我得到了它。

以前运行良好，但是当更新nodejs 5.11.1、mongodb 3.2.6、"mongoose": "^4.4.16"和"connect-mongo": "^1.1.0",时，这个错误就会出现。

未处理的拒绝:无法连接到(/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib/collection.js:1750:11) at indexInformation (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib/db.js:1625:25) at Db.indexInformation (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib的服务器( (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib/db.js:1082:8) at Db.ensureIndex (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib/db.js:1058:44) at ensureIndex (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib/ )( (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/mongodb/lib/collection.js:1808:44) at MongoStore.setAutoRemoveAsync (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/connect-mongo/src/index.js:123:40) at MongoStore.handleNewConnectionAsync (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules )/connect/src/index.js:116:18) at (/home/shaishab/Project/Open-Source/BS-Commerce/node_modules/connect-mongo/src/index.js:95:26) at module.exports module.exports at Object。(/home/shaishab/Project/Open-Source/BS-Commerce/server.js:31:38) at Module._compile (module.js:413:34) at Object.Module._extensions..js (module.js:422:10)

配置文件代码

var session = require('express-session'),
    MongoStore = require('connect-mongo')(session),
    mongoose = require('mongoose');

var db = mongoose.connect('dbUrl');
app.use(session({
        saveUninitialized: true,
        resave: true,
        secret: config.sessionSecret,
        store: new MongoStore({
            db: db.connection.db,
            collection: config.sessionCollection
        })
}));

有人能帮我吗？

Answer 1

终于找到了错误发生的地方！！，我发布这个答案，因为它可能会对其他人有所帮助。

更新mongoose和connect-mongo版本时出现问题。

需要更新：

MongoStore = require('connect-mongo')(session)

和

app.use(session({
        saveUninitialized: true,
        resave: true,
        secret: config.sessionSecret,
        store: new MongoStore({
            mongooseConnection: db.connection,
            collection: config.sessionCollection
        })
    }));

主要问题是MongoStore({db: db.connection.db而不是使用

db: db.connection.db

现在使用

mongooseConnection: db.connection

解决了我的问题:)

Answer 2

由于我没有db variable，所以我的解决方案是：

var mongoStore = require('connect-mongo')(session);
var mongoose = require('mongoose');

const connection = mongoose.createConnection('mongodb://localhost/chester');

app.use(session({
    secret: config.secrets.session,
    resave: true,
    saveUninitialized: true,
    store: new mongoStore({mongooseConnection: connection})
  }));

希望它能帮上忙