Nodejs winston登录到mongodb

Question

我试图为我的项目做高级日志记录。

var winston = require('winston');
var MongoDB = require('winston-mongodb').MongoDB;
var logger = new(winston.Logger)({
    transports : [
        new(winston.transports.MongoDB)({
            db : 'logs'
        })
    ]
});
module.exports = logger;

我得到了一个错误：

/opt/City13/node_modules/winston-mongodb/node_modules/mongodb/lib/url_parser.js:16
throw Error("URL must be in the format mongodb://user:pass@host:port/dbnam
      ^
Error: URL must be in the format mongodb://user:pass@host:port/dbname
at Error (<anonymous>)
at module.exports (/opt/City13/node_modules/winston-mongodb/node_modules/mongodb/lib/url_parser.js:16:11)
at Function.MongoClient.connect (/opt/City13/node_modules/winston-mongodb/node_modules/mongodb/lib/mongo_client.js:95:16)
at new exports.MongoDB (/opt/City13/node_modules/winston-mongodb/lib/winston-mongodb.js:124:25)
at Object.<anonymous> (/opt/City13/logger/index.js:5:7)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)

我尝试将主机ip地址添加到设置，但它不起作用。

Answer 1

此配置适用于我：

    var logger = new (winston.Logger)({
    transports: [
        new(winston.transports.MongoDB)({
            db : 'mongodb://localhost:27017/Book-catalog',
            collection: 'logs'
        })
       ]
    });

('Book-catalog‘是我的数据库名称)

Answer 2

来自他们的文档：db: MongoDB connection uri or preconnected db object.

你给了它一个字符串'logs‘。它想要的是连接所需的整个mongodb url。

他们在错误消息中给出了一个示例：mongodb://user:pass@host:port/dbname

如果你想指定集合(大概就是你想用‘logs’做的事情)，还有一个叫做' collection‘的选项