# Load/Reload the table data from a promise function

In some case, you need to load some new data.

- If you need to load new data, you just have to call the `dtInstance.changeData(fnPromise);`, where `fnPromise` is a promise or a function that returns a promise.

- If you need to reload the data, you just have to call the function `dtInstance.reloadData();`.

  To use this functionality, you must provide a function that returns a promise. Just a promise is not enough.

angular.module('showcase.dataReload.withPromise', ['datatables', 'ngResource']) .controller('DataReloadWithPromiseCtrl', DataReloadWithPromiseCtrl); function DataReloadWithPromiseCtrl(DTOptionsBuilder, DTColumnBuilder, $resource) { var vm = this; vm.dtOptions = DTOptionsBuilder.fromFnPromise(function() { return $resource('data.json').query().$promise; }).withPaginationType('full_numbers'); vm.dtColumns = [ DTColumnBuilder.newColumn('id').withTitle('ID'), DTColumnBuilder.newColumn('firstName').withTitle('First name'), DTColumnBuilder.newColumn('lastName').withTitle('Last name').notVisible() ]; vm.newPromise = newPromise; vm.reloadData = reloadData; vm.dtInstance = {}; function newPromise() { return $resource('data1.json').query().$promise; } function reloadData() { var resetPaging = true; vm.dtInstance.reloadData(callback, resetPaging); } function callback(json) { console.log(json); } }

data.json
data1.json

[{ "id": 860, "firstName": "Superman", "lastName": "Yoda" }, { "id": 870, "firstName": "Foo", "lastName": "Whateveryournameis" }, { "id": 590, "firstName": "Toto", "lastName": "Titi" }, { "id": 803, "firstName": "Luke", "lastName": "Kyle" }, ... ]