danielspaniel/adapters.application.js

## adapters.application.js
import DS from 'ember-data';

export default DS.RESTAdapter.extend({
});

## controllers.application.js
import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddles',
  thingIds: Ember.computed.mapBy('model.things', 'id'),
  thingState: Ember.computed.mapBy('model.things', 'isDeleted')
});

## index.html
<script src="https://cdn.jsdelivr.net/jquery.mockjax/2.2.1/jquery.mockjax.min.js" type="text/javascript"></script>

## models.big-person.js
import Person from "./person";
import attr from "ember-data/attr";

export default Person.extend({
   type: attr('string', { defaultValue: 'BigPerson' })
});

## 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({
  type: attr('string'),
  things: hasMany('thing')
});

## models.thing.js
import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  person: belongsTo('person', {polymorphic: true})
});

## routes.application.js
import Ember from 'ember';

export default Ember.Route.extend({
  beforeModel() {

    let data = {
      data: {
        id: 1,
       	type: 'big-person',
        relationships: {
          things: {
            data: [
            ]
          }
        }
      },
      included: [
        //{id: 1, type: "thing"},
        //{id: 2, type: "thing"}
      ]
    };
    this.store.pushPayload(data);
  },

  model() {
   let person = this.store.peekRecord('person', 1);
   $.mockjax({
     url: '/things',
     type: 'POST',
     responseText: {thing: {id: 1, person: {type: 'big-person', id: 1}}}
   });
   let thing = this.store.createRecord('thing', {person: person});
   thing.save()

   return thing;
  }
});

## templates.application.hbs

<html>
  <head>
  </head>

<body>
<h3>Welcome to Bug where pushPaylod does not clear hasMany relationship</h3>

<br>
My thing:{{model}}
<br>
I should have 0 things but I have:{{model.things.length}}

{{outlet}}
<br>
<br>
</body>
</html>

## 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",
    "mockjax": "https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js",
    "ember": "release",
    "ember-data": "release",
    "ember-template-compiler": "release",
    "ember-testing": "release"
  },
  "addons": {}
}
	import DS from 'ember-data';

	export default DS.RESTAdapter.extend({
	});
	import Ember from 'ember';

	export default Ember.Controller.extend({
	appName: 'Ember Twiddles',
	thingIds: Ember.computed.mapBy('model.things', 'id'),
	thingState: Ember.computed.mapBy('model.things', 'isDeleted')
	});
	import Person from "./person";
	import attr from "ember-data/attr";

	export default Person.extend({
	type: attr('string', { defaultValue: 'BigPerson' })
	});
	import Model from "ember-data/model";
	import attr from "ember-data/attr";
	import { belongsTo, hasMany } from "ember-data/relationships";

	export default Model.extend({
	type: attr('string'),
	things: hasMany('thing')
	});
	import Ember from 'ember';

	export default Ember.Route.extend({
	beforeModel() {

	let data = {
	data: {
	id: 1,
	type: 'big-person',
	relationships: {
	things: {
	data: [
	]
	}
	}
	},
	included: [
	//{id: 1, type: "thing"},
	//{id: 2, type: "thing"}
	]
	};
	this.store.pushPayload(data);
	},

	model() {
	let person = this.store.peekRecord('person', 1);
	$.mockjax({
	url: '/things',
	type: 'POST',
	responseText: {thing: {id: 1, person: {type: 'big-person', id: 1}}}
	});
	let thing = this.store.createRecord('thing', {person: person});
	thing.save()

	return thing;
	}
	});

	<html>
	<head>
	</head>

	<body>
	<h3>Welcome to Bug where pushPaylod does not clear hasMany relationship</h3>

	<br>
	My thing:{{model}}
	<br>
	I should have 0 things but I have:{{model.things.length}}

	{{outlet}}
	<br>
	<br>
	</body>
	</html>
	{
	"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",
	"mockjax": "https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js",
	"ember": "release",
	"ember-data": "release",
	"ember-template-compiler": "release",
	"ember-testing": "release"
	},
	"addons": {}
	}