尝试上传文件时出错

Question

我使用船长gridfs在我的风帆应用中上传图片，这是我的功能：

upload: (req, res) => {
        req.file('avatar')
            .upload({
                adapter: require('skipper-gridfs'),
                uri: 'mongodb://127.0.0.1/27017/linucLab',
                maxBytes: 1000000

            }, function whenDone(err, uploadedFiles) {
                if (err) return res.serverError(err);
                else return res.json({
                    files: uploadedFiles,
                    textParams: req.allParams()
                });
            });

    }

我收到此错误

MongoError: Can't get executor for query { files_id: ObjectId('591b702ad01d3aa826d545ba'), n: { $gte: 0 } }