如何解決它.. ?? TypeError：無法讀取未定義的屬性'FileSystem'

我試圖拆分和合並上載的pdf文件在nodejs中，而我正在運行時出現錯誤「TypeError：無法讀取未定義的屬性'FileSystem'」，「ReferenceError：FS不是定義「幫助我解決它。如何解決它.. ?? TypeError：無法讀取未定義的屬性'FileSystem'

var express = require('express'); 
var path = require('path'); 
var favicon = require('serve-favicon'); 
var logger = require('morgan'); 
var cookieParser = require('cookie-parser'); 
var bodyParser = require('body-parser'); 
var fileUpload = require('express-fileupload'); 
var routes = require('./routes/index'); 
var users = require('./routes/users'); 
var gm = require('gm'); 
var app = express(); 
var fs =require('fs'); 

app.use(fileUpload()); 

app.post('/upload', function(req, res) { 
    var sampleFile; 
    console.log("upload"); 
    if (!req.files) { 
     res.send('No files were uploaded.'); 
     return; 
    } 

    new FS.Store.FileSystem("thumbs", { 
     transformWrite: function(fileObj, readStream, writeStream) { 
      gm(readStream, fileObj.name() + '[0]').resize('100',   '100').stream('png').pipe(writeStream); 
     }, 
     beforeWrite: function (fileObj) { 
      return { 
       extension: 'pdf', 
       type: 'pdf' 
      }; 
     }, 
     path: "./public/images/", 
    }) 

    sampleFile = req.files.sampleFile; 
    console.log("statrttttttttt"); 
    console.log(req); 
    var fileName=sampleFile.name; 

    sampleFile.mv('./public/images/'+fileName, function(err) { 
     if (err) { 
      res.status(500).send(err); 
     } 
     else { 
      res.send("<html><h1><object data='/images/"+fileName+"'</h1></object></html>"); 
     } 
    }); 
}) 
// view engine setup 
app.set('views', path.join(__dirname, 'views')); 
app.set('view engine', 'ejs'); 

// uncomment after placing your favicon in /public 
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); 
app.use(logger('dev')); 
app.use(bodyParser.json()); 
app.use(bodyParser.urlencoded({ extended: false })); 
app.use(cookieParser()); 
app.use(express.static(path.join(__dirname, 'public'))); 
app.use('/js',express.static(path.join(__dirname, 'public/javascripts'))); 

app.use('/', routes); 
app.use('/users', users); 

module.exports = app;

來源

2016-07-27 Vijay Vino

new FS.Store.FileSystem("thumbs", { 
     transformWrite: function(fileObj, readStream, writeStream) { 
     gm(readStream, fileObj.name() + '[0]').resize('100', '100').stream('png').pipe(writeStream); 
     },

JavaScript是情況senesitive。你引用到fs模塊：

var fs = require('fs');

，並使用FS。

來源

2016-07-27 07:01:03

如果我使用FS而不是FS也出現錯誤「TypeError：無法讀取屬性'FileSystem'的未定義」 –

我相信你使用這個[插件]（https://github.com/CollectionFS/Meteor -CollectionFS）。你有它作爲你的依賴安裝？另外，我注意到它已被棄用，爲什麼你不使用本地節點功能來保存文件？ [檢查此]（http://stackoverflow.com/questions/2496710/writing-files-in-node-js） –

如何解決它.. ?? TypeError：無法讀取未定義的屬性'FileSystem'

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