node.js - 如何将我的 mongodb 与 Bluemix 上的 NODEjs 应用程序连接起来？

Question

我已经为 VCAP_SERVICES 尝试了以下代码:

if (process.env.VCAP_SERVICES) {
      var env = JSON.parse(process.env.VCAP_SERVICES);
      if (env['mongodb-2.2']) {
        var mongo = env['mongodb-2.2'][0]['credentials'];
      }
    } else {
           var mongo = {
              "username" : "user1",
              "password" : "secret",
              "url" : "mongodb://user1:secret@localhost:27017/test"
     }
}

//With this as the connector
var MongoClient = mongodb.MongoClient;
var db= MongoClient.connect(mongo.url, function(err, db) {
  if(err) {
    console.log("failed to connect to the database");
  } else {
    console.log("connected to database");
  }

但它一直抛出“TypeError:无法读取 underfined 的属性“url””

我试过使用 monk 作为连接器:

var monk = require('monk');
 var db = monk(mongo.url);

这也会引发相同的错误。我可能错误地使用了对象 mongo。

Answer 1

看起来 mongo.url 没有定义，尝试像下面这样重构你的代码。

var mongo = {};

if (process.env.VCAP_SERVICES) {
    var env = JSON.parse(process.env.VCAP_SERVICES);
    if (env['mongodb-2.2']) {
        mongo['url'] = env['mongodb-2.2'][0]['credentials']['uri'];
    }
    } else {
           var mongo = {
              "username" : "user1",
              "password" : "secret",
              "url" : "mongodb://user1:secret@localhost:27017/test"
     }
}

//With this as the connector
var MongoClient = mongodb.MongoClient;
var db = MongoClient.connect(mongo.url, function(err, db) {
if(err) {
    console.log("failed to connect to the database");
} else {
    console.log("connected to database");
}