Post TypeScript Object without '_id' field? - mongodb

Question

I use Express, Mongoose and Angular 2 (TypeScript) making an web app. Now I want to post a MyClass Instance without any _id field.
In mongoose we could use _id to do a lot of operations on mongoDB, so here is what I have done on the server side using mongoose
router.post('/', function(req, res, next) {
Package.create(req.body, function (err, post) {
if (err) return next(err);
res.json(post);
});
});
/* GET /package/id */
router.get('/:id', function(req, res, next) {
Package.findById(req.params.id, function (err, post) {
if (err) return next(err);
res.json(post);
});
});
/* PUT /package/:id */
router.put('/:id', function(req, res, next) {
Package.findByIdAndUpdate(req.params.id, req.body, function (err, post, after) {
if (err) return next(err);
res.json(post);
});
});
To contain the field _id I created a ts Class like this:
export class Package{
constructor(
public guid: string,
...
[other fields]
...
public _id: string
){}
}
Please note the _id at the end.
In my angular 2 service I am doing this to post the json object to server
//create new pakcage
private post(pck: Package): Promise<Package> {
let headers = new Headers({
'Content-Type': 'application/json'
});
return this.http
.post(this.packageUrl, JSON.stringify(pck), { headers: headers })
.toPromise()
.then(res => res.json())
.catch(this.handleError);
}
Then I received an error as shown in the screenshot below:
In which it indicates that the object I post back got a empty _id field.
How do I post a ts class without the _id field or should I do it totally differently?

Answer 1

Since no one has given an answer I went to the internet and found a good example of how to implement a Angular2 -- Mongoose -- Express System.
https://github.com/moizKachwala/Angular2-express-mongoose-gulp-node-typescript
A very good example with the original Hero App from official tutorial. Although it is based on RC1 but it provides a good start point on how to do the RESTFUL Request properly.
Hope this would help someone who is looking for a similar answer.