wildcard routes

controllers.application.js

import Ember from 'ember';

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

models.state.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';
import DS from 'ember-data'

export default Model.extend({
  abbreviation: DS.attr()
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

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

Router.map(function() {
  this.route('posts', function() {
  this.route('filter', function() {
    this.route('state', {path: '/:state_id'})
    this.route('any', { path: '/*path' });
  })
});
});

export default Router;

routes.posts.filter.any.js

import Ember from 'ember';

export default Ember.Route.extend({
  willTransition(transition) {
  	console.log(transition)
  }
});

routes.posts.filter.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.posts.filter.state.js

import Ember from 'ember';
import {inject as service} from '@ember/service'

export default Ember.Route.extend({
  router: service(),
  model(params) {
    console.log("PARAMS", router.currentUrl)
   let record = this.store.peekRecord('state', params.state_id)
   if (record) {
     return record
   } else {
     
     this.transitionTo('posts.filter') 
   }
  }
});

routes.posts.js

import Ember from 'ember';

export default Ember.Route.extend({
  init() {
  	this.store.createRecord('state', {id: 1, abbreviation: "OH"})
    this.store.createRecord('state', {id: 2, abbreviation: "PA"})
    this.store.createRecord('state', {id: 3, abbreviation: "NY"})
    return this._super(...arguments)
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

templates.posts.filter.any.hbs

<div> Any </div>

templates.posts.filter.hbs

<div> Filter </div>
{{outlet}}

templates.posts.filter.state.hbs

<div> State </div>
{{model.abbreviation}} - {{model.id}}

templates.posts.hbs

<div> Posts </div>
{{outlet}}

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}