Missing Model Relationship


Hi All :slight_smile:

I am using Ember 2.x with Ember Data 2.x with the RESTApdapter.

I am struggling to make sure that my POST requests are sending the right JSON data. For example, I do something like:

 43         let posObj = this.get('store').createRecord('pos', {
 44           name: posname
 45         });
 46         posObj.save();
 48         let uObj = this.get('store').createRecord('user', {
 49           username: user,
 50         });
 52         uObj.get('poss').pushObject(posObj);
 53         uObj.save(); 

I am expecting this to save the pos object and then create a new user object with a hasMany reference to the pos object.

This does not throw an exception. However, when a request is finally made to my server at the /api/users endpoint, it only shows:

{u'user': {u'username': u'fsdaf', u'pos': [None]}}

Notice that pos shows up as None in the end result. Models look like:


export default Model.extend({
  username: attr(),
  pos: hasMany('pos')


export default Model.extend({
  name: attr(),
  mos: hasMany('mos'),
  users: hasMany('user')

Any help or suggestions would be appreciated!


Possible that your posObj.save() has not resolved before you push it to poss hasMany—effectively meaning it doesn’t have an id yet and you’re adding an object with a null id to the hasmany.

Try this

let pos = this.get('store').createRecord('pos', { name: posname });
let user = this.get('store').createRecord('user', { username: user });
pos.save().then(pos => {

Or something like that.


http://emberjs.com/api/classes/RSVP.Promise.html and https://github.com/tildeio/rsvp.js/ are good places to look for more info on promises in Ember. The second link is the library that Ember uses for handling promises / asynchronous acode. :slight_smile: