Nested Records

core.js

Authoring = SC.Application.create(
    store: SC.Store.create().from(SC.Record.fixtures)
}) ;

file_model.js

Authoring.LibraryFile = SC.Record.extend({
	name: SC.Record.attr(String),
	path: SC.Record.attr(String),
	size: SC.Record.attr(Number),
	type: SC.Record.attr(String),
	checksum: SC.Record.attr(String),
	cdn: SC.Record.attr(Boolean)
});

files_controller.js

Authoring.libraryFileController = SC.ArrayController.create({
    // you probably want a chained observer here
    // this will fire if `content` or `content.files` changes,
    // instead of just `content.files`
    contentBinding: 'Authoring.libraryController*content.files'
}) ;

fixtures.js

sc_require('models/library_model');
//sc_require('models/file_model'); add here?

Authoring.Library.FIXTURES = [

{	
	user_id : 1,
	name : "Justin",
	files : [
	{	
		guid : 0,
		name : "photo1.png",
		path : "some/path",
		size : 26,
		type : "image/png",
		checksum : "",
		cdn : false
	},
	{	
		guid : 1,
		name : "photo2.png",
		path : "some/path",
		size : 14,
		type : "image/png",
		checksum : "",
		cdn : false
	},
	{	
		guid : 2,
		name : "photo3.png",
		path : "some/path",
		size : 12,
		type : "image/png",
		checksum : "",
		cdn : false
	},
	{	
		guid : 3,
		name : "photo4.png",
		path : "some/path",
		size : 4,
		type : "image/png",
		checksum : "",
		cdn : false
	},
	{	
		guid : 4,
		name : "photo5.png",
		path : "some/path",
		size : 18,
		type : "image/png",
		checksum : "",
		cdn : false
	},
	{	
		guid : 5,
		name : "photo6.png",
		path : "some/path",
		size : 12,
		type : "image/png",
		checksum : "",
		cdn : false
	}

	]
}
];

library_controller.js

Authoring.libraryController = SC.ObjectController.create({
    content: null
});

library_model.js

Authoring.Library = SC.Record.extend({
        primaryKey: 'user_id',
	name: SC.Record.attr(String),
	user_id: SC.Record.attr(Number),
	files: SC.Record.toMany('Authoring.LibraryFile', { nested: true })
});

some_view.js

SC.ScrollView.design({
    layout: { top: 140 },
    contentView: SC.ListView.design({
        layout: { top: 0 },
        classNames: 'library-list',
        actOnSelect: YES,
        showAlternatingRows: YES,
        rowHeight: 24,
        contentBinding: "Authoring.libraryFileController",
        selectionBinding: "Authoring.libraryFileController.selection",
        contentValueKey: "name",
        action: "fileClicked"
    })
})

states.js

// call to statechart action

// Here's the problem:
// If you look at the docs for SC.Store#find: http://docs.sproutcore.com/#doc=SC.Store&method=find&src=false
// You'll see that calling it without an ID parameter creates a RecordArray and returns it
// You're setting this to the content of an SC.ObjectController, which is expecting to proxy an object, not
// an array. So you're binding from Authoring.libraryController (an SC.ObjectController) to Authoring.libraryFileController
// which is an SC.ArrayController (this part is right). I'm suspecting you want to set the content of libraryController
// to an object. If you decide what your primaryKey for library is going to be (I'm assuming user_id but it can be whatever)
// then you just change it to load that ID. It will return an Authoring.Library object and produce the results you want!

Authoring.libraryController.set('content', Authoring.store.find(Authoring.Library, 1));