Entity manager cache not working

   Hi there,

I've been developing a SPA based on John Papa's example of code camper. I came across with breeze.js and I really want to use this rather than building my own client db context. So far it is OK, but like in code camper example I want to load some data from dataprimer and que the results as needed from local cache. but everytime I tried executeQueryLocally I got 'entityType is null' error. When I check getEntities() to see if I got the results in cached it returns blank but if I check data.results then there are results. my code is

define('dataservice.categories',
    ['jquery', 'underscore', 'ko', 'config', 'utils','breeze', 'store'],
    function ($, _, ko, config, utils, breeze, store) {

        var entityModel = breeze.entityModel,
            core = breeze.core;

        // configure Breeze for Knockout and Web API 
        core.config.setProperties({
            trackingImplementation: entityModel.entityTracking_ko,
            remoteAccessImplementation: entityModel.remoteAccess_webApi
        });

        // service name is route to the Web API controller
        var serviceName = '/api/breeze';

        // manager is the service gateway and cache holder
        var manager = new entityModel.EntityManager(serviceName);

        var getData = function () {
            var query = entityModel.EntityQuery.from("Categories");
            manager.executeQuery(query).then(function (data) {
                alert(data.results.length);  //this returns 45 results
                alert(manager.getEntities().length); // this returns 0 results. WHY????
            });
        },
        getByParentUrl = function (url, results) {
            var query = entityModel.EntityQuery.from("Categories");
            query = query.where("Parent.FriendlyUrl", "==", null);
            manager.executeQueryLocally(query); //I think this is the line where I got 'entityType is null' error
        }

        return {
            getData: getData,
            getByParentUrl: getByParentUrl
        }

    });

Please let me know if you have any question
Thank you,