AngularJS NG-模式选项消气二传手 [英] AngularJS ng-model-options getter-setter

问题描述

我刚刚升级到版本角1.3.8。

I've just upgrade to angular version 1.3.8.

在使用1.2.23版本，我创建了一个指令转换数据表单视图模型，反之亦然。

When using 1.2.23 version I've created a directive to convert the data form view to model and vice verse.

这是我的指令：

.directive('dateConverter', ['$filter', function ($filter) {

    return {

        require: 'ngModel',

        link: function (scope, element, attrs, ngModelController) {

            // Convert from view to model
            ngModelController.$parsers.push(function (value) {
                return $filter('date')(new Date(date), 'yyyy-MM-ddTHH:mm:ss')
            });

            // Convert from model to view
            ngModelController.$formatters.push(function (datetime) {
                return $filter('date')(datetime, 'MM/dd/yyyy');
            });
        }
    };
}]);

}）;

我看到这里的干将并结合制定者现在都支持，但我找不到任何地方如何使用两个干将和 setter方法​​。有没有办法做到这一点？这是 - ？可以NG-模式选项取代我的转换指令

I see here that getters and setters in binding are now supported, but I cannot find anywhere how to use both getters and setters. Is there any way to do it? That is - can ng-model-options replace my convert directive?

感谢

推荐答案

该文档似乎有点模糊，但用法相当简单。
你需要做什么：

The documentation might seem a bit fuzzy but the usage is quite simple. What you need to do:

1. HTML：
   

1. HTML:

<input ng-model="pageModel.myGetterSetterFunc"
ng-model-options=" {getterSetter: true }">

在JS控制器，而不是实际的模型中，创建将返回值的函数（+申请汽提），如果没有发送参数和将更新模型（+应用其他的变化），如果参数发送。

in JS controller, instead of the actual model, create a function that will return the value (+ apply stripping) if the there is no parameter sent and that will update the model (+ apply other changes) if a parameter is sent.

本的getter / setter方法​​基本上是认为价值和模型价值之间的另一个层。

The getter/setters is basically another "layer" between the view value and model value.

例如：

$scope.pageModel.firstName = '';
$scope.pageModel.myGetterSetterFunc: function (value) {
  if (angular.isDefined(value)) {
    $scope.pageModel.firstName = value + '...';
  } else {        
    return $scope.pageModel.firstName.substr(0,
      $scope.pageModel.firstName.lastIndexOf('...')
    );
  }
}

DEMO PLUNKER：
<一href=\"http://plnkr.co/edit/Zyzg6hLMLlOBdjeW4TO0?p=$p$pview\">http://plnkr.co/edit/Zyzg6hLMLlOBdjeW4TO0?p=$p$pview

（检查控制台 - http://screencast.com/t/3SlMyGnscl ）

(check console - http://screencast.com/t/3SlMyGnscl)

请注意：看到这将是有趣的怎么会有如此规模的可重用性方面。我建议来创建这些吸气/ setter方法​​作为外在可重复使用的方法和具有发电机它们（因为该数据模型是对于每种情况不同）。并在控制器只调用这些发电机。只是我的2美分。

NOTE: It would be interesting to see how would this scale in terms of reusability. I would advise to create these getter/setters as externalized reusable methods and have generators for them (because the data model is different for each case). And in controllers to only call those generators. Just my 2 cents.

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