Angular - capture datapicker value

Question

Hello, I’m having a problem in an angular application 2, I have 2 datepicker

<input type="text" data-date-format="dd/mm/yyyy" class="form-control pull-right" ng-model="ctrl.campanha.dataInicial" id="datepicker1" ng-init="initDatepicker1()">

<input type="text" data-date-format="dd/mm/yyyy" class="form-control pull-right" ng-model="ctrl.campanha.dataFinal" id="datepicke2" ng-init="initDatepicker2()">

I’m initiating them into my Controller by means of the following methods

$scope.initDatepicker1 = function () {

            $('#datepicker1').datepicker({
                autoclose: true
            })
        }

        $scope.initDatepicker2 = function () {
            $('#datepicke2').datepicker({
                autoclose: true
            })
        }
function validacoes() {


        console.log(vm.campanha.dataInicial)
        console.log(vm.campanha.dataFinal)
        return true
    }

When I try to regain the values of Datepicker through the function validacoes(), which is called by means of a ng-click they appear as Undefined, despite appearing within the input the values, see:

how can I solve this problem ?