javascript – TypeError:task不是async js parrallel中的函数

发布时间:2019-10-03 发布网站:脚本之家
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我正在尝试上传图像并使用下面的代码更新数据库集合中的图像的URL.
Controller.prototype.handle = function (req,res,next) {
  var id = req.params.id,controller = req.params.controller,optionalController;

  optionalController = _.clone(controller);

  // handle optional controller
  if (controller === 'newboat') {
    controller = 'boat';
  } else if (controller === 'newcrew') {
    controller = 'crew';
  }

  var files = req.files.files || {},monthYear = new Date(),monthYear = [monthYear.getFullYear(),monthYear.getMonth()],filename = files[0].originalFilename,path = files[0].path,extension = filename.match(EXPRESSION_EXTENSION)[1],destFolder = [ROOT,monthYear[0],'/',monthYear[1] ].join(''),destination = [ROOT,monthYear[1],id,'.',extension ].join('');      

  // log info  
  //console.log(id,controller,filename,extension,destination,path);

  var opts = JSON.stringify({id: id,photo: ['/uploads/',extension ].join('') });

  async.series([
                uploadImage(path,destFolder,destination),ProcessUpload(optionalController,opts,res) 
              ]);
};

// write file
var uploadImage = function(path,destination) {
    // The land of callbacks ------>>>>>> inception within inception
    mkdirp(destFolder,777,function (err) {      
       fs.readFile(path,function (err,data) {
           fs.writeFile(destination,data,function (err) {
                if (err) {
                    console.log('image not uploaded..');
                    return false;
                }else {
                  return true;
                }
            });
        });
    }); 

};


var ProcessUpload = function(optionalController,res ) {

  opts = JSON.parse(opts);

  if (optionalController === 'boat') {    
    updateBoatDatabase(opts);    
  }

};

/**
 * Update boat photo to database
 */
var updateBoatDatabase = function (opts,callback) {
  // save to database
  return dbServices.dbBoat.updatePhoto(opts,callback);
};

这是正在调用的数据库服务

/**
   * Update image
   */
  updatePhoto: function (opts,callback) {
    var id = opts.id;

    // find boat by id
    this.modelClass.findById(id,model) {
      if (err || !model)
        return callback(err);      

      // set update value
      model.photo = opts.photo;

      // save
      model.save(callback);
    });
  },

我在上传图像时遇到以下错误,但图像上传到服务器上,并且其URL也在数据库集合上更新.我假设它与我的回调有关,但我不确定我哪里出错了.任何关于如何调试这个的提示将不胜感激.

TypeError: task is not a function
    at /home/work/bluewatertracks/node_modules/async/lib/async.js:689:13
    at iterate (/home/work/bluewatertracks/node_modules/async/lib/async.js:265:13)
    at async.forEachOfSeries.async.eachOfSeries (/home/work/bluewatertracks/node_modules/async/lib/async.js:284:9)
    at _parallel (/home/work/bluewatertracks/node_modules/async/lib/async.js:688:9)
    at Object.async.series (/home/work/bluewatertracks/node_modules/async/lib/async.js:710:9)
    at Controller.handle (/home/work/bluewatertracks/server/routers/photoUploader.js:56:9)
    at Layer.handle [as handle_request] (/home/work/bluewatertracks/node_modules/express/lib/router/layer.js:82:5)
    at next (/home/work/bluewatertracks/node_modules/express/lib/router/route.js:110:13)
    at Form.<anonymous> (/home/work/bluewatertracks/node_modules/connect-multiparty/index.js:101:9)
    at emitNone (events.js:72:20)
    at Form.emit (events.js:166:7)
    at maybeClose (/home/work/bluewatertracks/node_modules/connect-multiparty/node_modules/multiparty/index.js:557:10)
    at endFlush (/home/work/bluewatertracks/node_modules/connect-multiparty/node_modules/multiparty/index.js:552:3)
    at WriteStream.<anonymous> (/home/work/bluewatertracks/node_modules/connect-multiparty/node_modules/multiparty/index.js:617:5)
    at emitNone (events.js:72:20)
    at WriteStream.emit (events.js:166:7)

解决方法

您还可以通过将null对象传递给bind()来简化此操作:
async.series( [
    uploadImage.bind( null,path,destination ),ProcessUpload.bind( null,optionalController,res )
] );

总结

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