如何在另一个节点文件中使用mongoose对象？

Question

我是node.js的新手。我试图在server.js中创建一个连接并在addAcction.js中使用它但在运行时遇到错误＆＃34;软件不是     一个构造函数＆＃34;，请帮助我吗？

   //Server .js
    var mongoose = require('mongoose');
    mongoose.connect('mongodb://localhost:27017/MSDN');
    var db = mongoose.connection;
    db.on('error', console.error.bind(console, 'connection error'));
    db.once('open', function callback() {
      console.log("Connection with database succeeded.");
    });
    module.exports = db;
    var SoftwareSchema   = new mongoose.Schema({
          SoftwareID: Number,
          SoftwareName: String,
        });
    module.exports = mongoose.model('Software', SoftwareSchema);

   //addAction.js

    var Software = require('./Server').Software;
    var Software1 = new Software({
    SoftwareID   : 1,
    SoftwareName : "MNG123",  
    });
    Software1.save(function(err){
       if ( err ) throw err;
       console.log("Software Saved Successfully");
   });