Angular JS - 如何从控制器更新有关 ng-repeat 的信息？

Question

我在 ng-repeat 中有一个 select 选项和几个文本区域，我想做的是，当我 select 从菜单中选择一个选项时，相应的文本区域集显示属于我刚刚 selected.

的一些信息

不是这样做，而是使用 ng-repeat 创建的所有文本区域显示信息。

这是 JSFiddle 的 link，可以更好地解释问题： https://jsfiddle.net/711yvm8g/5/

这是 HTML 代码：

<div ng-app="App">
   <div ng-controller="Ctrl">
      <div ng-repeat="data in carData">
        <select ng-model = "carSelected" ng-change = "changeInfo(carSelected)" data-ng-options = "car as car.name for car in cars">
        <option value = "">Select car</option>
      </select>

      <textarea>{{colorData}}</textarea>
      <textarea>{{yearData}}</textarea>
  </div>

这里是 Javascript 代码：

angular.module('App', []);

function Ctrl($scope) {
    //This carData object was created only to make the ng-repeat show multiple instances of the fields.
    $scope.carData = {
        a:"abc",
        b:"def"
    }

    $scope.cars = [{
        name: "Volvo"
    }, {
        name: "Saab"
    }]

    var volvoInfo = {
        color:"Blue",
        year:"2016"
    }

    var saabInfo = {
        color:"Red",
        year:"2015"
    }

    $scope.changeInfo = function(carSelected) {
        if(carSelected.name == "Volvo") {
            $scope.colorData = volvoInfo.color;
            $scope.yearData = volvoInfo.year;
        } else {
            $scope.colorData = saabInfo.color;
            $scope.yearData = saabInfo.year;
        }
    }
}

有什么办法可以解决这个问题吗？非常感谢。

Answer 1

为文本区域绑定尝试 Ctrl.colorData 和 Ctrl.yearData

Answer 2

您应该重构代码以使用对象数组。这样更容易管理。

angular.module('App', []);

function Ctrl($scope) {
  let carInfoModel = {
    name: '',
    color: '',
    year: '',
  }
  $scope.cars = [angular.copy(carInfoModel),angular.copy(carInfoModel)]

  $scope.carsInfo = [{
    name: 'Volvo',
    color: 'Blue',
    year: "2016"
  }, {
    name: 'Saab',
    color: 'Red',
    year: "2015"
  }]

}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="App">
  <div ng-controller="Ctrl">
    <div ng-repeat="data in cars">
      <select ng-model="data" data-ng-options="car as car.name for car in carsInfo">
        <option value="">Select car</option>
      </select>
      <textarea>{{data.color}}</textarea>
      <textarea>{{data.year}}</textarea>
    </div>
  </div>
</div>

Angular JS - 如何从控制器更新有关 ng-repeat 的信息？

Angular JS - How to update information on ng-repeat from controller?

html

angularjs

ng-repeat