Filtering all items of specific type (ref document)
The solution was to create a method in my service like so:
service.autoCompleteType = function(query) { var productList = null; var products = []; return Product .find() .populate('type') .exec() .then(function(products){ productList = products; }) .then(function(quantities){ for (var i in productList) { if (productList[i].type.code === query) { products.push(productList[i]); } } return products; });};This allowed me to query type.code as required and returned everything matching query