Model.findOne not returning docs but returning a wrapper object

问题

I have defined a Model with mongoose like this:

var mongoose = require("mongoose")
var Schema = mongoose.Schema

var userObject = Object.create({
    alias: String,
    email: String,
    password: String,
    updated: { 
        type: Date,
        default: Date.now
    }
})

var userSchema = new Schema(userObject, {strict: false})
var User = mongoose.model('User', userSchema)

module.exports = User

Then I created a user that I can perfectly find through mongo console like this:

db.users.findOne({ email: "coco@coco.com" });
{
    "_id" : ObjectId("55e97420d82ebdea3497afc7"),
    "password" : "caff3a46ebe640e5b4175a26f11105bf7e18be76",
    "gravatar" : "a4bfba4352aeadf620acb1468337fa49",
    "email" : "coco@coco.com",
    "alias" : "coco",
    "updated" : ISODate("2015-09-04T10:36:16.059Z"),
    "apps" : [ ],
    "__v" : 0
}

However, when I try to access this object through a node.js with mongoose, the object a retrieve is not such doc, but a wrapper:

This piece of code...

// Find the user for which the login queries
  var User = require('../models/User')
  User.findOne({ email: mail }, function(err, doc) {
    if (err) throw err
      if (doc) {
        console.dir(doc)
        if(doc.password == pass) // Passwords won't match

Produces this output from console.dir(doc)...

{ '$__': 
   { strictMode: false,
     selected: undefined,
     shardval: undefined,
     saveError: undefined,
     validationError: undefined,
     adhocPaths: undefined,
     removing: undefined,
     inserting: undefined,
     version: undefined,
     getters: {},
     _id: undefined,
     populate: undefined,
     populated: undefined,
     wasPopulated: false,
     scope: undefined,
     activePaths: { paths: [Object], states: [Object], stateNames: [Object] },
     ownerDocument: undefined,
     fullPath: undefined,
     emitter: { domain: null, _events: {}, _maxListeners: 0 } },
  isNew: false,
  errors: undefined,
  _doc: 
   { __v: 0,
     apps: [],
     updated: Fri Sep 04 2015 12:36:16 GMT+0200 (CEST),
     alias: 'coco',
     email: 'coco@coco.com',
     gravatar: 'a4bfba4352aeadf620acb1468337fa49',
     password: 'caff3a46ebe640e5b4175a26f11105bf7e18be76',
     _id: { _bsontype: 'ObjectID', id: 'Uét Ø.½ê4¯Ç' } },
  '$__original_validate': { [Function] numAsyncPres: 0 },
  validate: [Function: wrappedPointCut],
  _pres: { '$__original_validate': [ [Object] ] },
  _posts: { '$__original_validate': [] } }

Therefore, passwords won't match because doc.password is undefined.

Why is this caused?

回答1:

That's exactly the purpose of mongoose, wrapping mongo objects. It's what provides the ability to call mongoose methods on your documents. If you'd like the simple object, you can call .toObject() or use a lean query if you don't plan on using any mongoose magic on it at all. That being said, the equality check should still hold as doc.password returns doc._doc.password.

来源：https://stackoverflow.com/questions/32397419/model-findone-not-returning-docs-but-returning-a-wrapper-object

标签

node.js

mongodb

mongoose

nodes