How can I add default values for ember has many relationship? - ember.js

Question

I'm using Ember 2.5.0 and I have two models service and availability which looks like:
// availability
import DS from 'ember-data';
export default DS.Model.extend({
day: DS.attr('string'),
enabled: DS.attr('boolean'),
startAt: DS.attr('string'),
endAt: DS.attr('string'),
service: DS.belongsTo('service')
});
And service which looks like:
import DS from 'ember-data';
export default DS.Model.extend({
name: DS.attr('string'),
description: DS.attr('string'),
availabilities: DS.hasMany('availability',
{
defaultValue:
[
{
day: 'saturday',
enabled: false,
startAt: '',
endAt: ''
},
{
day: 'sunday',
enabled: false,
startAt: '',
endAt: ''
}
]
}
)
});
As you can see I was trying to use defaultValue but with no luck. For new route I want to set default values if we are creating a new service record.
Any help is appreciated.

Answer 1

The argument hash that DS.hasMany only accepts two properties: async and inverse. It doesn't accept a defaultValue property though. (source).
But fear not, Eki Eqbal! I think you can accomplish something similar by using your model's ready() hook.
import DS from 'ember-data';
export default DS.Model.extend({
name: DS.attr('string'),
description: DS.attr('string'),
availabilities: DS.hasMany('availability', { async: true }), // is the data loaded async?
ready() { // fires when the model is loaded from server or created locally
if (!!this.get('availabilities')) {
// don't set to defaults if availabilities is not null
return;
}
var saturday = this.store.createRecord('availability', {
day : 'saturday',
enabled : false,
startAt : '',
endAt : ''
});
var sunday = this.store.createRecord('availability', {
day : 'sunday',
enabled : false,
startAt : '',
endAt : ''
});
this.get('availabilities').pushObjects([saturday, sunday]);
}
});