var id = req.params.id;

firebase.database().ref(`collection/` + id).once('value')
    .then(function(data) {
        res.render('myEditTemplate', {
            id: id,
           collectionRecords: data.val()
        });
    })
    .catch(function(error) {
        res.render('error', {
            error: error
        });
    });

var id = req.body.id;
var name = req.body.name;
var image = req.file;

if (!req.file) {
    console.log('no image has been uploaded');

    firebase.database().ref(`collection/` + id).update({
        'name': name,
    });
} else {
    console.log('image successfully uploaded');

    var filePath = id + ".jpg";

    fs.rename(req.file.path, filePath, function(err) {
        if (err) {
            return res.render("error", {
                err: err
            });
        }

    var myPath = 'collection/' + filePath;
    var storageFile = bucket.file(myPath);
    var storageFileStream = storageFile.createWriteStream({
        metadata: {
             contentType: req.file.mimetype
        }
    });

    storageFileStream.on('error', function (err) {
       return res.render("error", { error: err });
    });

      storageFileStream.on('finish', function () {
            storageFile.makePublic(function(err, data) {

                if (err) {
                    return res.render("error", {
                         err: err
                         });
                    }
             });

            fs.unlink(filePath, function(err) {

                console.error(err);
            });

            firebase.database().ref(`collection/` + id).update({
                    'name': name,
                    'image_id': filePath
                });
            });
    fs.createReadStream(filePath).pipe(storageFileStream);
    });
}

});