Question

我正在尝试使用Express.js从Mongodb获取JSON，并返回＆＃34; Undefined＆＃34;在我的控制台中。你能建议吗？

app.js：

var db = monk('localhost:27017/nodetest1', {
  username : 'USERNAME',
  password : 'PASSWORD'
});

index.js：

router.get('/url', function(req,res){

    var db = req.db;
    var collection = db.get('test1');

    collection.find({},{},function(e,docs){
    console.log(docs) // Returns "Undefined"
    res.send(docs);
    });
});

Answer 1

检查＆＃34; e＆＃34;对象，可能你有错误

router.get('/url', function(req,res){
  var db = req.db;
  var collection = db.get('test1');

  collection.find({},{},function(e,docs){
    if (!e) {
      console.log(docs); // Data you supposed to get in a correct way
    } else {
      console.log(e); // Checking the error - connection failure, bad authentication, etc.
    }
  });
});

Express.js - Mongo对象返回Undefined

1 个答案: