SharePoint 2010, Client OM, jQuery Autocomplete and BCS/External lists

In this previous post, I used jQuery/SOAP/SPServices to access a SharePoint BCS list (an external list). I wanted to do the same thing using the Client Object Model (Some call it Clien OM? Or maybe CSOM?). Below is the code to access contact data in a BCS connection to Microsoft CRM 2011, and use it for autocomplete values. Things to note:

1. You need to have a method tag in your CAML statement. This tells the list which “Operation” (as it is listed in SharePoint Designer) to use
2. You need to use the “include method” with the executeQueryAsync method
3. You need to include the ViewFields tags in the CAML statement, and I think they should match the include statement above

$('#ContactsSearchTextbox').autocomplete({
    source: function( request, response ) {
	    var CAMLQuery= "<View><Method Name='ContactReadList' /><Query><Where><Contains><FieldRef Name='FullName' /><Value Type='Text'>"+request.term+"</Value></Contains></Where></Query><ViewFields><FieldRef Name='FullName' /><FieldRef Name='ContactId' /><FieldRef Name='ParentCustomerIdName' /></ViewFields></View>";
		var context = new SP.ClientContext.get_current();
		var web = context.get_web();
		var list = web.get_lists().getByTitle('Contacts');
		var query = new SP.CamlQuery;
		query.set_viewXml(CAMLQuery);
		allItems = list.getItems(query);
		context.load(allItems, 'Include(FullName,ContactId,ParentCustomerIdName)');
		context.executeQueryAsync(function (){
			var arrayOfResults = new Array();
			var listItemEnumerator = allItems.getEnumerator(); 
			while(listItemEnumerator.moveNext()) {
				var oListItem = listItemEnumerator.get_current();
				arrayOfResults.push(oListItem);
			}
			response($.map(arrayOfResults ,function( item ) {
				return {
				label: item.get_item('FullName') + ' (' + item.get_item('ParentCustomerIdName') + ')',
				value: item.get_item('ContactId'),
				id: item.get_item('FullName')
				}
			}));
		},function(sender, args){
		   alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
		});        
	},
	minLength: 5,
});