Stack Overflow#43300009

controllers.application.js

import Ember from 'ember';

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

controllers.my-route.js

import Ember from 'ember'
const {Controller} = Ember

export default Controller.extend({
  // == Keyword Properties ====================================================
  queryParams: ['export', 'foo'],
  export: null,

  queryParamsObserver: function () {
    if (this.get('export')) {
      this.exportFile();
      Ember.run.scheduleOnce('routerTransitions',this, ()=>{
        console.log('export property is being nullified');
        this.set('export', null)});
    }
  }.observes('export'),

  // == Functions =============================================================
  exportFile () {
    console.log('export performed');
  },

  // == Actions ===============================================================
  actions: {
  }

})

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('my-route');
});

export default Router;

routes.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({  
  queryParams:{
    export:{
    	refreshModel:false
    }
  },
  
  model(params, transition){
    return {
      msg: Math.floor(Math.random()*1000)
    };
  }
});

templates.application.hbs

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

{{#link-to 'my-route' (query-params export=true)}}export  = true{{/link-to}}
<br>
{{#link-to 'my-route'}}export  = undefined{{/link-to}}

<br>
<br>
<hr>
{{outlet}}
<br>
<br>

templates.my-route.hbs

This is my route! <br>
Current value of msg is: {{model.msg}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}