New Twiddle

adapters.cat.js

import DS from 'ember-data';

export default DS.JSONAPIAdapter;

adapters.dog.js

import DS from 'ember-data';

export default DS.RESTAdapter;

adapters.frog.js

import ActiveModelAdapter from 'active-model-adapter';

export default ActiveModelAdapter;

controllers.application.js

console.clear();

import Ember from 'ember';
import { task } from 'ember-concurrency';

// Setup pretender
new Pretender(function() {
  this.post('/cats', function(request) {
    let payload = JSON.parse(request.requestBody);

    // Just passes the errors object through as is.
    return [payload.data.attributes.status, {}, JSON.stringify({
      errors: [{
        detail: "Not enough meow",
        source: { pointer: 'data/attributes/meow_meow_meow' }
      }]
    })];
  });
  
  this.post('/dogs', function(request) {
    let payload = JSON.parse(request.requestBody);

    // Just passes the errors object through as is.
    return [payload.dog.status, {}, JSON.stringify({
      errors: [{
        detail: "Not enough woof",
        source: { pointer: 'data/attributes/woof_woof_woof' }
      }]
    })];
  });

  this.post('/frogs', function(request) {
    let payload = JSON.parse(request.requestBody);

    // Doesn't support JSON-API.
    return [payload.frog.status, {}, JSON.stringify({
      errors: {
        foo_bar_zaz: ['wtf', 'lol']
      }
    })];
  });
});

export default Ember.Controller.extend({  
  createCat: task(function*(status) {
    this.set('cat', this.store.createRecord('cat', { status }));
  	return this.get('cat').save();
	}),

  createDog: task(function*(status) {
    this.set('dog', this.store.createRecord('dog', { status }));
    return this.get('dog').save();
	}),

  createFrog: task(function*(status) {
    this.set('frog', this.store.createRecord('frog', { status }));
    return this.get('frog').save();
	})
});

models.cat.js

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

export default Model.extend({
  status: attr(),
  meowMeowMeow: attr()
});

models.dog.js

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

export default Model.extend({
  status: attr(),
  woofWoofWoof: attr()
});

models.frog.js

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

export default Model.extend({
  status: attr(),
  ribbitRibbit: attr()
});

styles.app.css

td, th {
  text-align: center;
  padding: 0.5em;
}

templates.application.hbs

<h1>Ember-Data Errors for Common Adapters</h1>
<br>
<br>
<table border=1>
  <thead>
    <tr>
      <th>Model</th>
      <th>Adapter</th>
      <th>422</th>
      <th>400</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Cat</td>
      <td>JSON-API</td>
      <td><button onclick={{perform createCat 422}}>!</button></td>
      <td><button onclick={{perform createCat 400}}>!</button></td>
    </tr>
    <tr>
      <td>Dog</td>
      <td>REST</td>
      <td><button onclick={{perform createDog 422}}>!</button></td>
      <td><button onclick={{perform createDog 400}}>!</button></td>
    </tr>
    <tr>
      <td>Frog</td>
      <td>Active Model</td>
      <td><button onclick={{perform createFrog 422}}>!</button></td>
      <td><button onclick={{perform createFrog 400}}>!</button></td>
    </tr>
  </tbody>
</table>

{{log "createCat error updated:" createCat.last.error}}
{{log "createDog error updated:" createDog.last.error}}
{{log "createFrog error updated:" createFrog.last.error}}

{{log "cat model errors updated:" cat.errors.meowMeowMeow}}
{{log "dog model errors updated:" dog.errors.woofWoofWoof}}
{{log "frog model errors updated:" frog.errors.ribbitRibbit}}

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",
    "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"
  },
  "addons": {
    "active-model-adapter": "2.1.1",
  	"ember-concurrency": "0.8.1",
    "ember-data": "2.12.1"
  }
}