deleteRecord-on-polymorhic-models

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    deleteRelation(relation) {
      relation.deleteRecord();
    }
  }
});

models.cat.js

import Pet from "./pet";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Pet.extend({
});

models.dog.js

import Pet from "./pet";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Pet.extend({
});

models.person.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('strign'),
  pets: hasMany('pet', { polymorphic: true }),
  toys: hasMany('toy'),
});

models.pet.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'),
  person: belongsTo('person'),
});

models.toy.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'),
  person: belongsTo('person'),
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {   
    const person = this.store.createRecord('person', {
      name: 'Jhon',
    });
    
    
    const cat = this.store.createRecord('cat', { name: 'Catty', person });
    const dog = this.store.createRecord('dog', { name: 'Doggy', person });
        
    person.get('pets').addObjects([cat, dog]);
    
    const batman = this.store.createRecord('toy', { name: 'batman', person });
    const superman = this.store.createRecord('toy', { name: 'superman', person })

    person.get('toys').addObjects([batman, superman]);
    
    return person;
  }
});

templates.application.hbs

<h1>Welcome polymorphic models:</h1>
<br>
<p>When you try to delete polymorhic model (pet) it stays in relation and store, after calling on them <code>deleteRecord()</code></p>

<hr>
<h4>Person: {{model.name}}, has {{model.pets.length}} polymorhic pets:</h4>
<ul>
  {{#each model.pets as |pet|}}
    <li>
      <b>{{pet.name}}</b>,
      isNew pet: <b>{{pet.isNew}}</b>,
      isDeleted pet: <b>{{pet.isDeleted}}</b>,
      <button onclick={{action 'deleteRelation' pet}}>delete {{pet.name}}</button>
    </li>
  {{/each}}
</ul>
<br>
<hr>
<p>On contrary when you delete defaul relation it is deleted from parent record and from store</p>
<h4>Person: {{model.name}}, has {{model.toys.length}} default hasMany toys:</h4>
<ul>
  {{#each model.toys as |toy|}}
    <li>
      <b>{{toy.name}}</b>,
      isNew pet: <b>{{toy.isNew}}</b>,
      isDeleted pet: <b>{{toy.isDeleted}}</b>,
      <button onclick={{action 'deleteRelation' toy}}>delete {{toy.name}}</button>
    </li>
  {{/each}}
</ul>
<br>
<hr>
{{outlet}}
<br>
<br>

tests.helpers.destroy-app.js

import { run } from '@ember/runloop';

export default function destroyApp(application) {
  run(application, 'destroy');
}

tests.helpers.resolver.js

import Resolver from '../../resolver';
import config from '../../config/environment';

const resolver = Resolver.create();

resolver.namespace = {
  modulePrefix: config.modulePrefix,
  podModulePrefix: config.podModulePrefix
};

export default resolver;

tests.helpers.start-app.js

import Ember from 'ember';
import Application from '../../app';
import config from '../../config/environment';

const { run } = Ember;
const assign = Ember.assign || Ember.merge;

export default function startApp(attrs) {
  let application;

  let attributes = assign({rootElement: "#test-root"}, config.APP);
  attributes = assign(attributes, attrs); // use defaults, but you can override;

  run(() => {
    application = Application.create(attributes);
    application.setupForTesting();
    application.injectTestHelpers();
  });

  return application;
}

tests.test-helper.js

import resolver from './helpers/resolver';
import {
  setResolver
} from 'ember-qunit';
import { start } from 'ember-cli-qunit';

setResolver(resolver);
start();

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "3.3.2",
    "ember-template-compiler": "release",
    "ember-testing": "release"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}