Directive for select type input 4 materialize.css

directive-select.js

angular.module('standard.directives',[])
  .directive('selectExemplo',function($timeout){
    return{
      scope:{
        fields : '=',
        nameMasterField: '@'
      },
      template : '<div class="input-field s12 m8 col">' +
        '<select id="selectExemplo" data-ng-model="selected" data-ng-options="campo.id as campo.name for campo in fields"></select>' +
        '<label>{{nameMasterField}}</label>'+
      '</div>',
      link: function($scope, elem, attrs, ngModel){
        $timeout(function(){
          elem.find('select').material_select();
        });
      }

    }
  });