ref helper

adapters.application.js

import DS from "ember-data";

export default DS.JSONAPIAdapter.extend();

helpers.ref.js

import Ember from 'ember';

const {
  inject,
  Helper
} = Ember;

/*
  We extend from String so that the default model deserialization hook in Ember's route's will treat this as an ID and trigger the model hook
  vs. thinking of this as a model.
  
  This allows you to use `{{link-to 'foo' ref}}` or `{{link-to 'foo' ref.id}}`. This is probably bad and you can also just enforce use of `id`.
*/
class Ref extends String {
  constructor(id, type, store) {
    super(id);
    this.type = type;
    this.id = id;
    this.__store = store;
  }
  
  /*
    By implementing this, any property that isn't id or type will throw an error.
  */
  unknownProperty(key) {
    throw new Error(`You accessed the property '${key}' on a reference for ${this.type}:${this.id}, but only 'id' and 'type' are available on references.`);
  }
  
  /*
    call fetch to retrieve the record
  */
  fetch() {
    return this.__store.findRecord(this.type, this.id);
  }
  
  toString() {
    return `${this.id}`;
  }
  
  valueOf() {
    return this.id;
  }
}

export default Ember.Helper.extend({
  store: inject.service('store'),
  
  compute([model, relName]) {
    let rel = model.relationshipFor(relName);
    let store = this.get('store');
    if (!rel) {
      throw new Error(`No such relationship '${relName}' on ${model}`);
    }
    let type = rel.type;
    if (rel.kind === 'belongsTo') {
      rel = model.belongsTo(relName).value();
      return new Ref(rel.id, relName, store);
    }
    let arr = model.hasMany(relName).value().currentState;
    let len = arr.length;
    let refs = new Array(len);
    
    for (let i = 0; i < len; i++) {
      refs[i] = new Ref(arr[i].id, type, store);
    }
    
    return refs;
  }
});

initializers.pretender.js

export function returnJSON(status, body) {
  return json(...arguments);
};

export function json(status, body) {
  if (arguments.length === 1) {
    body = status;
    status = 200;
  }
  
  return [
    status,
    { "Content-Type": "application/json" },
    JSON.stringify(body)
  ];
};

export const server = new Pretender();

export function initialize() {
  server.handledRequest = function(verb, path, request) {
    console.log(`handled request to ${verb} ${path}`);
  }

  server.unhandledRequest = function(verb, path, request) {
    console.log(`undhandled request ${verb} ${path}`);
  }
};

export default {
  name: 'pretender',
  initialize
};

models.person.js

import DS from "ember-data";

const { Model, attr, belongsTo, hasMany } = DS;

export default Model.extend({
  name: attr(),
  siblings: hasMany('person', { inverse: null }),
  father: belongsTo('person', { inverse: null })
});

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('person', { path: 'person/:id' });
});

export default Router;

routes.application.js

import Ember from 'ember';
import { server, json } from '../initializers/pretender';

export default Ember.Route.extend({
  model: function() {
    this.store.push({
      data: {
        id: 1,
        type: 'person',
        attributes: {
          name: "George Michael Bluth"
        },
        relationships: {
          siblings: {
            data: [
              { id: 2, type: 'person' },
              { id: 3, type: 'person' },
              { id: 4, type: 'person' },
              { id: 5, type: 'person' }
            ]
          },
          father: {
            data: { id: 6, type: 'person' }
          }
        }
      },
      included: [
        {
        	id: 2,
        	type: 'person',
        	attributes: {
          	name: "Maeby Fünke 1"
        	}
      	},
        {
        	id: 3,
        	type: 'person',
        	attributes: {
          	name: "Maeby Fünke 2"
        	}
      	},
        {
        	id: 4,
        	type: 'person',
        	attributes: {
          	name: "Maeby Fünke 3"
        	}
      	},
        {
        	id: 5,
        	type: 'person',
        	attributes: {
          	name: "Maeby Fünke 4"
        	}
      	},
        {
        	id: 6,
        	type: 'person',
        	attributes: {
          	name: "Papa Bluth"
        	}
      	}
      ]
    });

    return this.store.peekRecord('person', 1);
  }
});

routes.person.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params) {
    return this.get('store').findRecord('person', params.id);
  }
});

serializers.application.js

// import DS from "ember-data";
import Ember from 'ember';

export default Ember.Object.extend({
  normalizeResponse(_, __, payload) {
    return payload;
  }
});

/*
export default DS.JSONAPISerializer.extend({
  keyForRelationship(key) {
    return key;
  }
});
*/

templates.application.hbs

Name: {{model.name}} <br>

{{#link-to 'person' (ref model 'father')}}Father{{/link-to}}
Siblings:

<ol>
{{#each (ref model 'siblings') as |sibling| }}
	<li>
  {{#link-to 'person' sibling}}
  	{{sibling.id}}
   {{/link-to}}
   </li>
{{/each}}
</ol>
<hr>
{{outlet}}

templates.person.hbs

<h1>Selected Person</h1>
<h2>{{model.name}}</h2>

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "release",
    "ember-data": "canary",
    "ember-template-compiler": "release",
    "route-recognizer": "https://rawgit.com/tildeio/route-recognizer/56f5fcec6ae58d8e86b5dc77609809fb91198142/dist/route-recognizer.js",
    "FakeXMLHttpRequest": "https://rawgit.com/pretenderjs/FakeXMLHttpRequest/23c3a96b5b24f1bfe595867437e4f128a29c2840/fake_xml_http_request.js",
    "pretender": "https://rawgit.com/pretenderjs/pretender/c6de9afe18b1472aded2592f5a80ad9a26a0e262/pretender.js"
  }
}