在MEAN堆栈中填充mongodb中的数据时出错

Question

我正在开发一个具有脚本的演示平均应用程序，该脚本将员工数据填充到mongo db中。在节点中运行populate脚本时，我收到错误消息：

:/var/www/html/mean/hr$ node bin/populate_db.js
{ Error: Cannot find module '../build/Release/bson'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/var/www/html/mean/hr/node_modules/mongoose-post-find/node_modules/bson/ext/index.js:15:10)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/var/www/html/mean/hr/node_modules/mongoose-post-find/node_modules/bson/lib/bson/index.js:3:24)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32) code: 'MODULE_NOT_FOUND' }
js-bson: Failed to load c++ bson extension, using pure JS version
Deleting employees
Done deleting employees
Deleting teams
Done deleting teams
Adding employees
Done adding employees
Adding teams
Done adding teams
Updating employee teams
Done updating employee teams
Done!

我的填充数据脚本如下：

var async = require('async');
var mongoose = require('mongoose');
require(process.cwd() + '/lib/connection');
var Employee = mongoose.model('Employee');
var Team = mongoose.model('Team');
var data = {
    employees: [{
            id: '1000003',
            name: {
                first: 'Colin',
                last: 'Ihrig'
            },
            image: 'images/employees/1000003.png',
            address: {
                lines: ['11 Wall Street'],
                city: 'New York',
                state: 'NY',
                zip: 10118
            }
        },
        {
            id: '1000021',
            name: {
                first: 'Adam',
                last: 'Bretz'
            },
            address: {
                lines: ['46 18th St', 'St. 210'],
                city: 'Pittsburgh',
                state: 'PA',
                zip: 15222
            }
        },
        {
            id: '1000022',
            name: {
                first: 'Matt',
                last: 'Liegey'
            },
            address: {
                lines: ['2 S Market Square', '(Market Square)'],
                city: 'Pittsburgh',
                state: 'PA',
                zip: 15222
            }
        },
        {
            id: '1000025',
            name: {
                first: 'Aleksey',
                last: 'Smolenchuk'
            },
            image: 'images/employees/1000025.png' /* invalid image */ ,
            address: {
                lines: ['3803 Forbes Ave'],
                city: 'Pittsburgh',
                state: 'PA',
                zip: 15213
            }
        },
        {
            id: '1000030',
            name: {
                first: 'Sarah',
                last: 'Gay'
            },
            address: {
                lines: ['8651 University Blvd'],
                city: 'Pittsburgh',
                state: 'PA',
                zip: 15108
            }
        },
        {
            id: '1000031',
            name: {
                first: 'Dave',
                last: 'Beshero'
            },
            address: {
                lines: ['1539 Washington Rd'],
                city: 'Mt Lebanon',
                state: 'PA',
                zip: 15228
            }
        }
    ],
    teams: [{
            name: 'Software and Services Group'
        },
        {
            name: 'Project Development'
        }
    ]
};
var deleteEmployees = function (callback) {
    console.info('Deleting employees');
    Employee.remove({}, function (error, response) {
        if (error) {
            console.error('Error deleting employees: ' + error);
        }
        console.info('Done deleting employees');
        callback();
    });
};
var addEmployees = function (callback) {
    console.info('Adding employees');
    Employee.create(data.employees, function (error) {
        if (error) {
            console.error('Error: ' + error);
        }
        console.info('Done adding employees');
        callback();
    });
};
var deleteTeams = function (callback) {
    console.info('Deleting teams');
    Team.remove({}, function (error, response) {
        if (error) {
            console.error('Error deleting teams: ' + error);
        }
        console.info('Done deleting teams');
        callback();
    });
};
var addTeams = function (callback) {
    console.info('Adding teams');
    Team.create(data.teams, function (error, team1) {
        if (error) {
            console.error('Error: ' + error);
        } else {
            data.team_id = team1._id;
        }
        console.info('Done adding teams');
        callback();
    });
};
var updateEmployeeTeams = function (callback) {
    console.info('Updating employee teams');
    var team = data.teams[0];
    // Set everyone to be on the same team to start
    Employee.update({}, {
        team: data.team_id
    }, {
        multi: true
    }, function (error, numberAffected, response) {
        if (error) {
            console.error('Error updating employe team: ' + error);
        }
        console.info('Done updating employee teams');
        callback();
    });
};
async.series([
    deleteEmployees,
    deleteTeams,
    addEmployees,
    addTeams,
    updateEmployeeTeams
], function (error, results) {
    if (error) {
        console.error('Error: ' + error);
    }
    mongoose.connection.close();
    console.log('Done!');
});

我尝试将bin文件夹更改为应用程序的root，但我仍然遇到同样的错误。

有什么问题？