EmberJs Change name to belongsTo property in model

I'am starting with Ember, and I wanted to know if its possible to do this-->

My server model of a book:

Book = { name: 'string', author_id: 'number' }

But in my ember side i wanted to have something like this:

Book = { name: DS.attr('string'), author: DS.belongsTo('author' , {via: 'author_id'}) }

Is this possible? Thanks,