当未定义属性时，Angularjs Filter无法正常工作

I have the following setup

我有以下设置

  $scope.array = 
    [
      {propertyA: "test", 
       propertyB: {
                   propertyC: [true, true, false]
                  }
      },
      {propertyA: "test2"},
      {propertyA: "test3"}
    ]
  $scope.