Modal isn't working two way bind

Hello!
I have this html

  <body ng-controller="AppCtrl">
  <ion-side-menus>
    <ion-side-menu-content>
      <ion-nav-bar class="nav-title-slide-ios7 bar-positive">
        <ion-nav-back-button class="button-icon ion-arrow-left-c">
        </ion-nav-back-button>
      </ion-nav-bar>
        <ion-nav-buttons side="left">
          <button class="button button-icon button-clear ion-navicon" ng-click="toggleLeft()">
          </button>
        </ion-nav-buttons>    
      <ion-nav-view animation="slide-left-right" name="main-view"></ion-nav-view>
    </ion-side-menu-content>
    <ion-side-menu side="left">
        <div class="list">
          <a menu-close href="#" class="item item-icon-left">
            <i class="icon ion-home"></i>
            Home
          </a>
          <a menu-close href="#/product" class="item item-icon-left">
            <i class="icon ion-home"></i>
            products
          </a>
          <a menu-close href="#/category" class="item item-icon-left">
            <i class="icon ion-home"></i>
            Category
          </a>        
        </div>  
    </ion-side-menu>
    </ion-side-menus>
    <script id="product.html" type="text/ng-template">
      <ion-view title="products">
        <ion-content>
          <div class="list">
            <a class="item" href="#/product-form?id={{item.id}}" ng-repeat="item in items | filter:{nome: searchText}">
              {{item.nome}}
              <span class="item-note">
                {{item.quantidade}}
              </span>
            </a>
          </div>    
        </ion-content>
        <div class="tabs tabs-icon-top">
          <a class="tab-item" href="#/product-form">
            <i class="icon ion-home"></i>
            Adicionar
          </a>
          <a class="tab-item" ng-click="openModal()">
            <i class="icon ion-search"></i>
            Filtrar
          </a>
        </div>     
    </ion-view>
    </div>
    </script>   
    <script id="search.html" type="text/ng-template">
      <div class="bar bar-header item-input-inset">
      <label class="item-input-wrapper">
        <i class="icon ion-ios7-search placeholder-icon"></i>
        <input type="search" placeholder="busca" ng-model="searchText">
      </label>
      <button class="button button-clear" ng-click="closeModal()">
        cancelar
      </button>
      </div>
    </script>
  </body>

And with this controller

  angular.module('ionicApp.controllers', ['ionicApp.config', 'xc.indexedDB'])
        .controller('ProductController',function($scope, $ionicPopup, $timeout, $ionicModal, $indexedDB, $window, $ionicModal){
  $scope.safeApply = function(fn) {
    var phase = this.$root.$$phase;
    if(phase == '$apply' || phase == '$digest') {
      if(fn && (typeof(fn) === 'function')) {
        fn();
      }
    } else {
      this.$apply(fn);
    }
  };

  var OBJECT_STORE_NAME = constants.productStore; 
  $scope.items = [];
  $scope.searchText = "";


  $scope.getAll = function(){

    var myObjectStore = $indexedDB.objectStore(OBJECT_STORE_NAME);

    myObjectStore.getAll().then(function(results) {  
      // Update scope
      $scope.safeApply(function(){
          $scope.items = results;    
      });
    }); 
  };

  $scope.getAll();



  $ionicModal.fromTemplateUrl('search.html', {
    scope: $scope,
    animation: 'slide-left-right'
  }).then(function(modal) {
    $scope.modal = modal;
  });

  $scope.closeModal = function() {
    alert($scope.searchText);
    $scope.modal.hide();
  };

  $scope.openModal = function() {
    //$scope.searchText = "a";
    $scope.getAll();
    $scope.modal.show();
  };

  $scope.closeModal = function() {
    alert($scope.searchText);
    $scope.modal.hide();
  };
  //Cleanup the modal when we're done with it!
  $scope.$on('$destroy', function() {
    $scope.modal.remove();
  });
  // Execute action on hide modal
  $scope.$on('modal.hidden', function() {
    // Execute action
  });
  // Execute action on remove modal
  $scope.$on('modal.removed', function() {
    // Execute action
  });  

  })

My problem is the searchText model isnt updating when the value changes. I tried $watch, ng-options.
I can put a initial value to the $scope.searchText on openModal method, but after inputed values dont update the model value, because of this my list isnt filtred.
Anyone could help me?

Thanks.