当NG-模型控制器初始化Angularjs选择NG变化不会触发 [英] Angularjs select ng-change is not triggered when ng-model is initialized in controller

问题描述

我有我的选择，像这样

<select ng-model="id_select" ng-options="fide.id as fide.name for fide in fides" ng-change="loadInfo()">
   <option value="" selected disabled>Seleccionar</option>
</select>

在我的控制器我有这个

And in my controller I have this

RestService.getFides().then(function(fides){

   $scope.id_select = fides;
   if(typeof $rootScope.selected_id !== 'undefined')
   {
      $scope.id_select = $rootScope.selected_id
   }
});

$scope.loadInfo = function() {
  alert("triggered!!");
}

我的选择是加载预期与惹人但是当我尝试设置我的$ rootScope价值NG-切换功能loadInfo（）选择值不会被触发，但是当我在视图中选择它工作正常。

My select is loading as expected with fides but when I try to set my select value with $rootScope's value ng-change function loadInfo() is not triggered but when I select in my view it works fine.

的我在做什么任何想法错了？

Any ideas of what am I doing wrong?

感谢您所有您的帮助：）

Thank you all in advance for your help :)

推荐答案

从文档 ngChange ：

评估前给予pression 当用户改变输入。这位前pression立即进行评估，不同的是JavaScript的onchange事件仅触发在变化的结束（通常，当用户离开表单元素或presses返回键）。 当值的变化是从模型来这位前pression不计算

Evaluate the given expression when the user changes the input. The expression is evaluated immediately, unlike the JavaScript onchange event which only triggers at the end of a change (usually, when the user leaves the form element or presses the return key). The expression is not evaluated when the value change is coming from the model.

您需要打电话给你的事件处理程序，如果你手工编程正在改变模型：

You need to call your event handler manually if you are changing the model programatically:

if (typeof $rootScope.selected_id !== 'undefined') {
  $scope.id_select = $rootScope.selected_id;
  $scope.loadInfo();
}

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