这让我一整天。我可以使用 gfs.exist() 找到带有 _id 的实际文件,但是当我运行到下一行代码时,每次都会出错,并且猫鼬连接崩溃。这看起来很简单,但到目前为止没有任何效果。
我的代码:
/**
* Created by foolishklown on 10/2/2016.
*/
var Grid = require('gridfs-stream'),
User = require('../../models/user'),
mongoose = require('mongoose');
module.exports = function(id, ref, type, res) {
console.log(ref.green);
Grid.mongo = mongoose.mongo;
var conn = mongoose.createConnection('mongodb://localhost/media');
conn.once('open', function () {
var gfs = Grid(conn.db);
gfs.exist({_id: ref}, function(err, found) {
if(err) {
console.error('error finding file'.red);
} else {
console.info('found file', found);
gfs.files.remove({_id: ref }, function(err) {
if(err) {
console.error('error removing that file');
process.exit(1);
} else {
console.info('removed file: ', found.green);
deleteFromUserDb(id, type, ref);
res.status(200).send({id: id, type: type, ref: ref});
}
});
}
});
});
conn.close();
function deleteFromUserDb(userId, fileType, refId) {
var userConn = mongoose.createConnection('mongodb://localhost/mean-auth', (error) => {
if(error) {
console.error('Error connecting to the mean-auth instance'.red);
process.exit(1);
} else {
User.findById(userId, (err, doc) => {
if(err) {
console.error('Error finding user with id: ', uid);
process.exit(1);
} else {
console.log('original doc: ', doc);
doc.removeMedia(fileType, refId);
doc.save();
console.log('new doc: ', doc);
}
})
}
});
}
};
我尝试使用 gfs.files.remove({_id: ref}, function(.....) 无济于事
我也尝试过使用 gfs.files.remove({_id: ref}, {_id: 1}, function(....)
我也尝试过使用 gfs.remove() 没有 gfs.files.remove 的上述两种方法.....
它一定很简单,但它整天都在殴打我......谢谢
新编辑 10/15 ........我现在正在尝试仅使用本机 mongodb 驱动程序。我可以找到带有字符串的文件,并将其转换为 objectId。看起来操作完成没有问题,但是当我使用 shell 查看文件是否已被删除时,它仍然存在于 fs.files 和 fs.chunks 中。这个要死我了!
deleteFile: function(userId, fileType, objId, res) {
var ObjectId = require('mongodb');
var client = mongodb.MongoClient;
var _id = new ObjectId(objId);
client.connect(mediaUri, (err, db) => {
assert.equal(null, err);
db.collection('fs.files').find({_id: _id}, (err, doc) => {
if(err) {
console.error('error finding that document in files collection'.red);
} else {
console.info('found the document: ', doc);
console.info('the document type is: ', typeof(doc));
}
});
db.collection('fs.chunks').find({_id: _id }, (err, doc) => {
if(err) {
console.error('error finding that document in the chunks collection'.red);
} else {
console.info('found the document(s): ', doc);
console.info('the document type is: ', typeof(doc));
}
});
db.collection('fs.files').deleteOne({_id: _id}, (err, doc) => {
console.log('document returned for deletion is: ', doc);
});
db.collection('fs.chunks').deleteOne({_id: _id}, (err, doc) => {
console.log('documents deleted: ', doc);
res.status(200).send({id: userId, type: fileType, ref: objId});
});
db.close();
})
}