Checkboxes selected just once in a modal box

I have a JSON object which has a collection of values that it is used to evaluate and compare the values of checkboxes and check them. This works fine just when I open for the first time the modal box, but if I close the modal and open it again then the checkboxes are not selected anymore.

I am using angularjs and jquery.

app.controller('EnterpriseController', function($scope, $uibModalInstance, $location, EnterpriseService){

    if($uibModalInstance && $scope.editableDepartment){
        $uibModalInstance.rendered.then(function(){
            for(var i = 0; i < $scope.editableDepartment.sections.length; i++){
                $(".sections-list").find("input").each(function(){
                    if($(this).val() == $scope.editableDepartment.sections[i].id){
                        $(this).prop('checked', true);
                    }
                });
            }
        });
    }

});