Custom adapter endpoints

adapters.application.js

import JSONAPIAdapter from 'ember-data/adapters/json-api';

export default JSONAPIAdapter.extend({
  namespace: '/api'
});

adapters.product.js

import ApplicationAdapter from './application';

export default ApplicationAdapter.extend({
  urlForQuery(query, modelName) {
    let userId = query.supportedByUser;
    delete query.supportedByUser;
    return userId
      ? `${this.namespace}/users/${userId}/supported_products`
      : this._super(...arguments);
  }
});

controllers.application.js

import Controller from '@ember/controller';
import { reads } from '@ember/object/computed';

export default Controller.extend({
  queryParam: ['userId'],
  products: reads('model'),
  userId: 0
});

mirage.config.js

export default function() {
  this.namespace = '/api';
  this.resource('products');
  this.get('/users/:id/supported_products', function({ products }) {
    return products.all();
  });
}

mirage.factories.product.js

import { Factory } from 'ember-cli-mirage';

export default Factory.extend({
  name() { return faker.commerce.productName(); },
});

mirage.scenarios.default.js

export default function(server) {
  server.createList('product', 20);
}

models.product.js

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

export default Model.extend({
  name: attr('string')
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: {
    userId: { refreshModel: true }
  },
  
  model({ userId }) {
    return this.store.query('product', { supportedByUser: userId });
  }
});

templates.application.hbs

{{input type="number" value=this.userId}}

<ul>
  {{#each this.products as |product|}}
    <li>{{product.name}}</li>
  {{else}}
    <li>No products available</li>
  {{/each}}
</ul>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "ENV": {
  	"ember-cli-mirage": {
    	"enabled": true
    }
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2",
    "ember-cli-mirage": "0.4.14"
  }
}