我正在angularJS中编写此网页,我希望人们编辑和存储文本和图像。我创建了一个文件上传功能,让你从用户计算机上传文件。问题是将此文件存储到mongoDB中。我在gridFS上阅读了很多例子,但没有一个与我想要做的完全匹配。 这是我的代码:
网络server.js:
app.post('/uploadFile', function(req,res){
console.log("Retrieved:");
console.log(req.files);
var Grid = require('gridfs-stream');
var gfs = Grid(DB, mongoose.mongo);
// streaming to gridfs
var writestream = gfs.createWriteStream(req.files.file);
fs.createReadStream(req.files.file.path).pipe(writestream);
services.js:
function uploadFilesToServer(file){
var fd = new FormData();
fd.append("file", file);
var deferred = $q.defer();
console.log("trying to save:");
console.log(file);
$http({
method:"POST",
url: "uploadFile",
data: fd,
withCredentials: true,
headers: {'Content-Type': undefined },
transformRequest: angular.identity
}).success(function(data){
var returnValue = [true, file, data];
deferred.resolve(returnValue);
}).error(function(data){
var returnValue = [false, file, data];
deferred.resolve(returnValue);
});
return deferred.promise;
}
目前,当我运行代码时,我没有收到任何错误消息,但是这些图像都不存储在db.files或db.chunks中。任何帮助表示赞赏。
答案 0 :(得分:2)
如果没有用户设置,GridFS流通常会将其数据存储在db.fs.files / db.fs.chunks中。
要更改此设置,您必须添加:
{
....
root: 'my_collection'
....
}
到gridfs-stream选项。
来自NPM docs:
createWriteStream
To stream data to GridFS we call createWriteStream passing any options.
var writestream = gfs.createWriteStream([options]);
fs.createReadStream('/some/path').pipe(writestream);
Options may contain zero or more of the following options...
{
_id: '50e03d29edfdc00d34000001', // a MongoDb ObjectId
filename: 'my_file.txt', // a filename
mode: 'w', // default value: w+, possible options: w, w+ or r,
see [GridStore]
(http://mongodb.github.com/node-mongodb-native/api-generated/gridstore.html)
//any other options from the GridStore may be passed too, e.g.:
chunkSize: 1024,
content_type: 'plain/text',
// For content_type to work properly, set "mode"-option to "w" too!
root: 'my_collection',
metadata: {
...
}
}