DS#loadRelations not working

demo.js

'use strict';

angular.module('console').factory('Employer', function(DS, $rootScope){
  var store = DS.defineResource({
    name: 'Employer',
    idAttribute: 'guid',
    endpoint: '/employers',
    keepChangeHistory: true,
    schema: {
      name: 'string',
      total_employees: 'number'
    },
    hasMany: {
      'EmployerDirector': {
        localField: 'employerDirectors',
        foreignKey: 'employer_guid'
      }
    }
  });
  $rootScope.$on('$unauthorized', function(){
    store.ejectAll();
  });
  return store;
}).run(['Employer', angular.noop]);


angular.module('console').factory('EmployerDirector', function(DS, $rootScope){
  var store = DS.defineResource({
    name: 'EmployerDirector',
    idAttribute: 'guid',
    endpoint: '/employer_directors',
    keepChangeHistory: true,
    schema: {
      employer_guid: 'string',
      director_guid: 'string',
    },
    relations: {
      hasOne: {
        'Director': {
          localField: 'director',
          localKey: 'director_guid'
        }
      },
      belongsTo: {
        'Employer': {
          localField: 'employer',
          localKey: 'employer_guid',
          parent: true
        }
      }
    }
  });
  $rootScope.$on('$unauthorized', function(){
    store.ejectAll();
  });
  return store;
}).run(['EmployerDirector', angular.noop]);

angular.module('console').factory('ResolveEmployers', function(Employer, EmployerDirector, $q, $rootScope){
  return function () {
    return (
      Employer.getAll().length ?
        $q.when(Employer.getAll()) :
        Employer.findAll()
    )
    .then(function(employers){
      if (employers.length) {
        return $q.all((employers || []).map(function(employer){
          console.log(employer.guid);
          return $q.when(Employer.loadRelations(employer.guid));
        }));
      } else {
        return $q.reject();
      }
    });
  };
});

angular.module('console').run(function(ResolveEmployers){ResolveEmployers();});