I try to load hasMany associations embedded...what am I doing wrong?!

models.coffee

App.User = DS.Model.extend
  #...
  addresses:  DS.hasMany(GleichklangWeb.Address,  { embedded: true })
  
App.Address = DS.Model.extend
  #...
  user:  DS.belongsTo(GleichklangWeb.User)

server_response.json

{
  user: {
    id:              669,
    alias:           'ExampleUser',
    //....
    addresses: [
      {
        id:                 111,
        country_code:       'DE',
        //....
      },  
      {   
        id:                 121,
        country_code:       'DE',
        //.....
      }
    ]
  }
}