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);
};
/**
* 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 )
] );
