node.js - NodeJS : Mongoose return wrong results from MongoDB although Mongo shell return correct ones

Question

我正在使用 Express 构建我的第一个 NodeJS 应用程序，并使用 MongoDB 作为数据库和 Mongoose 作为建模工具。我正在关注tutorial from MDN作为我的指导。 问题是当我从我的应用程序查询 MongoDB 时，它返回错误的结果，但是当我从 Mongo shell 查询它时，我得到正确的结果。 一个示例场景是下面的代码，尽管其中有文档(由 Mongo shell 正确返回)，但对我的集合进行的每次计数都返回零 (0):

var async = require('async');

var GeneralUser = require('../models/guser');
var Truck = require('../models/truck');
var Trip = require('../models/trip');
var TruckLocation = require('../models/location');

exports.index = function(req, res, next) {
    async.parallel({
        user_count: function(callback) {
            GeneralUser.count(callback);
        },
        truck_count: function(callback) {
            Truck.count(callback);
        },
        trip_count: function(callback) {
            Trip.count(callback);
        },
        location_count: function(callback) {
            TruckLocation.count(callback);
        },

    }, function(err, results) {
        res.render('index', { title: 'My App Home Page', error: err, data: results });
    });
};

我可能缺少什么？任何有关我可能做错的地方的提示都将受到高度赞赏。

编辑1
guser.js

  var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var GUserSchema = Schema(
  {
    firstName: {type: String, required: true, maxlength: 100},
    lastName: {type: String, required: true, maxlength: 100},
    username: {type: String, required: true, unique: true, minlength: 6, maxlength: 20},
    password: {type: String, required: true, minlength: 8, maxlength: 20},
    gender: {type: String, required: true, enum: ['Male','Female'], default: 'Male'},
    bio: {type: String, match: /[aA-zZ]/, default: ''},
    companyName: {type: String, maxlength: 100, default: ''},
    physicalAddress: {type: String, required: true},
    city: {type: String, required: true, maxlength: 100},
    country: {type: String, required: true, maxlength: 100},
    mobileNo: {type: String, required: true, match: /[0-9]{12}/, default: '255656516903'},
    email: {type: String, required: true, unique: true, match: /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/},
  }
);
//Export model
module.exports = mongoose.model('GeneralUser', GUserSchema);

位置.js

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var LocationSchema = Schema(
  {
    locationName: String,
    geo: {type: [Number], index: '2dSphere'},
    tripID: {type: Schema.ObjectId, ref: 'Trip', required: true},
    loggedDate: {type: Date, default: Date.now},
  }
);
//Export model
module.exports = mongoose.model('TruckLocation', LocationSchema);

旅行.js

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var TripSchema = Schema(
  {
    startingLocation: {type: String, required: true, maxlength: 100},
    destination: {type: String, required: true, maxlength: 100},
    routeName: {type: String, required: true, maxlength: 100},
    plannedDeparture: {type: Date, required: true},
    expectedArrival: {type: Date, required: true},
    containerIsFull: {type: Boolean, required: true},
    truckID: {type: Schema.ObjectId, ref: 'Truck', required: true},
  }
);
//Export model
module.exports = mongoose.model('Trip', TripSchema);

卡车.js

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

var TruckSchema = Schema(
  {
    truckName: {type: String, required: true, maxlength: 100},
    truckType: {type: String, required: true, maxlength: 100},
    truckModel: {type: String, required: true, maxlength: 100},
    containerNo: {type: String, required: true, maxlength: 10},
    truckPass: {type: String, required: true, minlength: 8, maxlength: 20},
    ownerID: {type: Schema.ObjectId, ref: 'GeneralUser', required: true},
  }
);
//Export model
module.exports = mongoose.model('Truck', TruckSchema);

以上是我应 @Haroon Khan 要求的模型。

我的故障排除似乎仍然没有任何结果。

Answer 1

试试这个:

Truck.count({}, callback);