Nested dynamic routes and loading models directly

Design
1

Hi there, lets say ive got two models: alpha

export default DS.Model.extend({
  title: DS.attr('string'),
  description: DS.attr('string'),
  states: DS.hasMany('state', {
    async: true
  })
});

and state

export default DS.Model.extend({
  title: DS.attr('string'),
  description: DS.attr('string'),
});

now ive got the following router:

export default Router.map(function() {
  this.route('alphas', function() {
    this.route('show', {path: ':alpha_title'}, function() {
      this.route('states', function() {
        this.route('show', {path: ':state_title'}, function() {

        });
      });
    });
  });
});

on my alphas/index-route im loading all alpha-records in the model-hook like that:

index-route

export default Ember.Route.extend({
  model: function() {
    return this.store.findAll('alpha');
  }
});

in my template for alphas/index im using {{link-to}}-helper to navigate to alphas.show like that

{{#each model as |alpha|}}
      <li>
        {{#link-to 'alphas.show' alpha}}
          {{alpha.title}}
        {{/link-to}}
      </li>
{{/each}}

because of the dynamic segment with :alpha_title I have to override the serialize-hook in the target alphas/show-route

export default Ember.Route.extend({
  model: function(params) {
   return this.store.find('alpha', { id: params.alpha_title });
 }, 
  serialize: function(model) {
    return {
      alpha_title: model.get('title')
    };
  }
});

You can also see I was wondering what to do, if im on that route and the browser gets reload. No model-context would be given anymore, because i reached that route not with the link-to helper from above which gives the model, but directly with entering the URL by hand. So thats why im overriding the model-hook with the above (which is simply not working - dont know why), to load the single alpha directly.

My question is…

Is that a good approach to fetch the data or should i never transport modles via link-to helpers (or maybe only with that)? What is the best plan to handle loading models in such a case when accessing dynamic routes manually via URL for example?