Mongoose 引用 _id 不起作用

Question

This is my code for a login route, I am trying to call docs._id but it gives me back null . When I call just docs it shows this on server side:

[ { _id: EX unique id, username: { user: 'EXUsername', search: 'exusername' }, pass: 'EXpassword', email: 'EXemail' } ]

I am really confused on why I can't call docs.pass or docs._id at all but docs itself has stuff in it and I can call docs and it gives data back.

my code in node.js:

router.post('/loginUser', function(req, res){
  CheckingLogin(req.db, req.body.username, req.body.password, function(bool, docs){
    if(bool && exists(docs)){
    var err = false;
    var handleError = function(e){
    if(err){
      err = true;
      var eDoc = {};
      eDoc.errorCode = 1;
      eDoc.error = e;
      console.log(eDoc);
    }
  }
  /////problem here//////////////////////////////////
  var userID = docs._id;
  console.log(docs._id);
  if(userID != null){
    if(!err){
      tokens.db = req.db;
      tokens.refresher.create(userID, function(token){
        console.log('in token refresher ' + docs);
        res.send('1');
      });
    }else{
      console.log('Token err = true');
    }
  }else{
    console.log('Creator token = null');
    res.send('0');
  }
    }else{
        res.send('0');
    }
  });
});

Answer 1

嘿，它是一个对象数组，所以像这个docs[0]._id一样获取它，它对你有用。