0_adapter.js

import ApplicationAdapter from './application';
import UrlTemplates from "ember-data-url-templates";

export default ApplicationAdapter.extend(UrlTemplates, {
  queryUrlTemplate: '{+host}/posts/{endpoint}',

  urlSegments: {
    endpoint(type, id, snapshot, query) {
      // we're extracting the endpoint from the query object...
      let ep = query.endpoint;

      // ... and we delete it, so that the actual query does not contain
      // a useless "endpoint"
      delete query.endpoint;

      return ep;
    },
  }
});

1_route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    let query = {endpoint: "favorites"};

    return this.store.query('post', query);
  },
});