I have an emberjs/ember-data/firebase/emberfire client-side app that Im building.
Ember : 1.11.0-beta.1+canary.d2d1490d
Ember Data : 1.0.0-beta.14.1
EmberFire : 1.3.2
jQuery : 1.11.2
I have a bidirectional relationship declared in ember-data models
widget model belongsTo customer
customer hasMany widgets
Creating the related widget works fine from the customer controller using addObject()
// add widget
var widget = this.store.createRecord('widget', {
name: data.name.trim(),
_time: new Date().getTime(),
customer: model,
});
// save and add to model
widget.save().then(function(widget){
model.get('widgets').addObject(widget);
model.save();
});
An audit of the data in FB and in UI look good.
So, now to actually delete the widget from its widget view controller, (not unlink it from the customer), I want to also cascade the delete to the customer that owns this widget. I'm understanding that this should be automatic with with the correct hasMany/belongsTo setup in the model, but its failing. I think the issue is emberfire, but before I bug report, can someone check me?
if I use destroyRecord() in the WidgetsViewController, the widget is removed, but no cascade to the customer .. also no errors.
Some research suggested using
model.deleteRecord();
this.store.dematerializeRecord(model);
... and maybe because this doesn't persist the delete, no errors. But when you add model.save() to commit the delete, Firebase error:
FIREBASE WARNING: Exception was thrown by user callback. TypeError: Cannot read property 'get' of null
at DS.FirebaseAdapter.DS.Adapter.extend._handleChildValue (http://0.0.0.0:4200/assets/vendor.js:80787:20)
That code shows:
_handleChildValue: function(store, type, serializer, snapshot) {
//No idea why we need this, we are alredy turning off the callback by
//calling ref.off in recordWillUnload. Something is fishy here
if (store.isDestroying) {
return;
}
var value = snapshot.val();
if (value === null) {
var id = this._getKey(snapshot);
var record = store.getById(type, id);
//TODO refactor using ED
if (!record.get('isDeleted')) {
record.deleteRecord();
}
} else {
...
}
}
So can anyone shed light on whether there is a reason firebase developer thought this wasn't needed or whether it is and its just not implemented? .. or perhaps point me in another direction that does work?
---------- update added model relationships ---------------
// customer model
import DS from 'ember-data';
export default DS.Model.extend({
name: DS.attr('string', { async:true }),
widgets: DS.hasMany('widget', { async:true }),
_time: DS.attr('number', { async:true }),
});
// widget model
import DS from 'ember-data';
export default DS.Model.extend({
name: DS.attr('string', { async:true }),
_time: DS.attr('number', { async:true }),
customer: DS.belongsTo('customer', { async:true })
});
