redirect to child route

app.js

import Ember from 'ember';
import Resolver from './resolver';
import loadInitializers from 'ember-load-initializers';
import config from './config/environment';

let App;

Ember.MODEL_FACTORY_INJECTIONS = true;

App = Ember.Application.extend({
  modulePrefix: config.modulePrefix,
  podModulePrefix: config.podModulePrefix,
  Resolver,
  LOG_TRANSITIONS: true,
  LOG_TRANSITIONS_INTERNAL: true
});

loadInitializers(App, config.modulePrefix);

export default App;

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('missions', function () {
    this.route('mission', {path: '/:mission_id'});
  });
});

export default Router;

routes.missions.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  beforeModel() {
    console.log('missions --- beforeModel');
  },
  
  model() {
    console.log('missions --- model'); 
    return [{id: 1}, {id: 2}, {id: 3}];
  },
  
  afterModel() {
    console.log('missions --- afterModel');
    this.transitionTo('missions.mission', 1);
  },
  
  redirect() {
    console.log('missions --- redirect');
    //this.transitionTo('missions.mission', 1);
  },
  
  setupController() {
    console.log('missions --- setupController');
  },
  
  renderTemplate() {
    console.log('missions --- renderTemplate');
    return this._super(...arguments);
  }
  
});

routes.missions.mission.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  beforeModel() {
    console.log('missions.mission --- beforeModel');
  },
  
  model() {
    console.log('missions.mission --- model');
  },
  
  afterModel() {
    console.log('missions.mission --- afterModel');
  },
  
  setupController() {
    console.log('missions.mission --- setupController');
  },
  
  renderTemplate() {
    console.log('missions.mission --- renderTemplate');
    return this._super(...arguments);
  }
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{outlet}}
{{link-to "Click" "missions"}}

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}