Ember render child template

I am trying to render a details view based on what gets clicked on the list view (parent/child view). So I have nested route as below;

this.route('my-list', function() {
    this.route('my-details', {
        path: '/details'
    });
});

Also my child/details route looks like below

export default Ember.Route.extend({
model: function(params){
    var detailsUrl = "/myApp/json/" + params.myCode + "/details";
    var detailsRequest = new Ember.RSVP.Promise(function(resolve, reject) {
        Ember.$.ajax({
            url: detailsUrl,
            type: "POST",
            data: JSON.stringify({
                'id': params.Id
            }),
            contentType: 'application/json;charset=utf-8',
            dataType: 'json',
            success: function(response) {
                resolve(response);
            },
            error: function(reason) {
              reject(reason);
            }
        });
    });
    detailsRequest.then(function(response) {
        return response; // I do get the correct response here
    }, function(error) {
    });
},
setupController: function(controller, model) {
    debugger;
    controller.set('model', model);
}
});

And my child/details controller looks like below

export default Ember.Controller.extend({
    queryParams: ['myCode','Id'],
    productCode: null
});

And my child template is as below; (I have a {{outlet}} in my parent/list template)

<p>Child details </p>
someId : {{model.someId}}

While I am able to make the AJAX call to "/myApp/json/" + params.myCode + "/details" and get the response, it is not getting rendered to the child template

I noticed the setupController not getting called. Does it have to be manually called OR should it get called automatically (Do rememeber I am using a nested view)