Ember 2.10.2 + Ember Data 2.10.0 has bugs on relationships

[Leooo]

For example, a REST relationship failing because of an API error resolves the second time it is called (id(s) are set to null after first failure).

Updating Ember Data to 2.11.0 resolves the issue.

[Leooo]

Please have a look at this twiddle to reproduce:

[https://ember-twiddle.com/305861d9a5e157117f350afa59215cb0?openFiles=routes.application.js%2C]
EDIT: MY TWIDDLE HAS BEEN OVERRIDEN WITH OLDER VERSION :(

//models/parent.js
export default Model.extend({
  child: belongsTo('child'),
  children: hasMany('child', {inverse: 'parentHasMany'})
});

all children API calls fail normally from Mirage

1. With Ember-data 2.10 and any Ember version, calling parent.get('child') fails the first time, and calling it a second time resolves the promise (bug)
2. With Ember-data 2.10 and any Ember version, calling parent.get('children') fails the first time, and calling it a second time resolves the promise (bug)
3. With Ember-data 2.11.3 or higher and any Ember version, calling parent.get('child') fails the first time, and calling it a second time resolves the promise (bug)
4. With Ember-data 2.11.3 or higher and any Ember version, calling parent.get('children') fails the first time, and calling it a second time still fails (now fixed, but only for hasMany)

[Leooo]

Can someone look at this? Looks like a very big bug to me, is it not (acceptance) tested?

[Leooo]

• Ember-Data 2.12.x has this bug
• Ember-Data 2.13 has this bug: TypeError: Cannot read property 'eachAttribute' of null (store.unloadAll bug?) #4963
• Ember-Data 2.14 freezes Chrome when trying to use Ember inspector
• Ember-Data 2.15.0-beta-4 has bug Could not find module ember-data/-private imported from ember-data/setup-container #5019
• https://github.com/runspired/data/tree/fix-import-stripping freezes Chrome when trying to use Ember inspector (same as 2.14)

Closing as this bug solved in most recent versions.