Ember js hasmany relationship saving data - ember.js

Question

I have two models in Ember where one is a collection and the other is book. Collection model has a "hasMany" relationship with "book" and "book" "belongsTo" "collection". So what i want to do is have a form with both models in and store them at the same time.
Collection Model
// collection Model
export default DS.Model.extend({
name: DS.attr('string'),
city: DS.attr('string'),
books: DS.hasMany('book', { async: true })
});
The book model
//book Model
export default DS.Model.extend({
title: DS.attr('string'),
description: DS.attr('string'),
collection: DS.belongsTo('collection', {async: true})
});
The form
//Collection View
<div class="row">
<div class="col-sm-12">
<div class='panel panel-default'>
<div class='panel-body'>
<form>
<fieldset>
<legend>
Collection
</legend>
<div class="row">
<div class="col-sm-6">
<label for="name" class="col-sm-2">Name</label>
<div class="col-sm-10">
{{input id="name" type="text" class="form-control" value=collection.name}}
</div>
</div>
<div class="col-sm-6">
<label for="city" class="col-sm-2">city</label>
<div class="col-sm-10">
{{input id="city" type="text" class="form-control" value=collection.city}}
</div>
</div>
</div>
</fieldset>
<fieldset>
<legend>
books
</legend>
<div class="row">
<div class="col-sm-6">
<label for="title1" class="col-sm-2">title</label>
<div class="col-sm-10">
{{input id="title1" type="text" class="form-control" value=book.title1}}
</div>
</div>
<div class="col-sm-6">
<label for="description1" class="col-sm-2">description</label>
<div class="col-sm-10">
{{input id="description1" type="text" class="form-control" value=book.description1}}
</div>
</div>
</div>
<div class="row">
<div class="col-sm-6">
<label for="title2" class="col-sm-2">title</label>
<div class="col-sm-10">
{{input id="title2" type="text" class="form-control" value=book.title2}}
</div>
</div>
<div class="col-sm-6">
<label for="description2" class="col-sm-2">description</label>
<div class="col-sm-10">
{{input id="description2" type="text" class="form-control" value=book.description2}}
</div>
</div>
</div>
</fieldset>
<div class="row">
<div class="col-sm-12">
<button {{action 'addCollection'}} class="btn btn-primary">New Collection</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
The controller:
actions:{
addCollection: function(){
var name = this.get('collection.name');
var city = this.get('collection.city');
var title1 = this.get('book.title1');
var description1 = this.get('book.description1');
var title2 = this.get('book.title2');
var description2 = this.get('book.description2');
var newCollection = this.store.createRecord('collection', {
name: name,
city: city,
});
},
As you can see I'm trying to obtain 2 sets of books for this collection, but I'm having trouble on finding the correct procedure to store items to these models. I guess I may have to store the collection model first and then push the individual books to the collection. Is this correct? How would I go about it?

Answer 1

If the book is a record already you can simply push it onto the new collection. You don't don't need to assign anything to variables since your template is already bound to the record.
As an improvement I'd suggest creating the collection before the add as well. Either within your model, or on controller initiation.
So the action could be as simple as this.
actions:{
addCollection: function(){
// newCollection and Book need to be records
this.get("newCollection").pushObject(this.get('book'));
},
}
Note: the createRecord will not persist until you call .save() but you do not need to call .save() to create a relationship.
Forgive me for not noticing the multiple new books, here is a more pertinent example.
// template.hbs
<div class="row">
<div class="col-sm-12">
<div class='panel panel-default'>
<div class='panel-body'>
<form>
<fieldset>
<legend>
Collection
</legend>
<div class="row">
<div class="col-sm-6">
<label for="name" class="col-sm-2">Name</label>
<div class="col-sm-10">
{{input id="name" type="text" class="form-control" value=model.newCollection.name}}
</div>
</div>
<div class="col-sm-6">
<label for="city" class="col-sm-2">city</label>
<div class="col-sm-10">
{{input id="city" type="text" class="form-control" value=model.newCollection.city}}
</div>
</div>
</div>
</fieldset>
<fieldset>
<legend>
books
</legend>
<div class="row">
<div class="col-sm-6">
<label for="title1" class="col-sm-2">title</label>
<div class="col-sm-10">
{{input id="title1" type="text" class="form-control" value=model.book1.title}}
</div>
</div>
<div class="col-sm-6">
<label for="description1" class="col-sm-2">description</label>
<div class="col-sm-10">
{{input id="description1" type="text" class="form-control" value=model.book1.description}}
</div>
</div>
</div>
<div class="row">
<div class="col-sm-6">
<label for="title2" class="col-sm-2">title</label>
<div class="col-sm-10">
{{input id="title2" type="text" class="form-control" value=model.book2.title}}
</div>
</div>
<div class="col-sm-6">
<label for="description2" class="col-sm-2">description</label>
<div class="col-sm-10">
{{input id="description2" type="text" class="form-control" value=model.book2.description}}
</div>
</div>
</div>
</fieldset>
<div class="row">
<div class="col-sm-12">
<button {{action 'addCollection' model}} class="btn btn-primary">New Collection</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
// route.js
model () {
return Ember.RSVP.hash({
newCollection: this.get('store').createRecord('collection'),
book1: this.get('store').createRecord('book'),
book2: this.get('store').createRecord('book')
})
}
// controller.js
actions:{
addCollection(model) {
model.newCollection.pushObject(model.book1);
model.newCollection.pushObject(model.book2);
},
}
Notice I've used the model to create the records before hand and it's being passed into the action. You still may need to save for these changes to persist.