switch to RESTAdapter - EmberJS - ember.js

Question

I have been looking at EmberJS tutorials, but all of them use FixtureAdapter, and I'm trying to switch to RESTAdapter, but I'm facing a persistent error
Error: Assertion Failed: Expected an object as `data` in a call to push for Books.Book , but was undefined
here's the code for the adapter:
Books.ApplicationAdapter = DS.RESTAdapter.extend({
host: 'http://localhost:24818/api/'});
and calling the api in the router:
Books.BooksRoute = Ember.Route.extend({
model: function() {
return this.store.find('book',1);
}
});
How do I get store.find to return a JSON to be used in the Handlebars template?
Many thanks,
Edit: this is my API response:
[{"Id":1,"Title":"Pride and Prejudice","Year":1813,"Price":9.99,"Genre":"Comedy of manners","AuthorId":1,"Author":null},{"Id":2,"Title":"Northanger Abbey","Year":1817,"Price":12.95,"Genre":"Gothic parody","AuthorId":1,"Author":null},{"Id":3,"Title":"David Copperfield","Year":1850,"Price":15.00,"Genre":"Bildungsroman","AuthorId":2,"Author":null},{"Id":4,"Title":"Don Quixote","Year":1617,"Price":8.95,"Genre":"Picaresque","AuthorId":3,"Author":null}]
Edit: add model definition:
Books.Book = DS.Model.extend({
title: DS.attr('string'),
year: DS.attr('number'),
price: DS.attr('number'),
genre: DS.attr('string'),
authorId: DS.attr('number'),
author: DS.attr('string')
});

Answer 1

I think you need to normalize your response. i.e
"books": [
{
"id":1,
"Title":"Pride and Prejudice",
"Year":1813,
"Price":9.99,
"Genre":"Comedy of manners",
"AuthorId":1,"Author":null
},
{
"id":2,
"Title":"Northanger Abbey",
"Year":1817,
"Price":12.95,
"Genre":"Gothic parody",
"AuthorId":1,
"Author":null
},
{
"id":3,
"Title":"David Copperfield",
"Year":1850,
"Price":15.00,
"Genre":"Bildungsroman",
"AuthorId":2,
"Author":null
},
]
If you have no control over the endpoint. You will need to setup a serializer or normalizer to normalize your response into this expected format.
--
Useful Links
Ember-data Model Maker
Ember JSON Conventions
REST Serializer