javascript - 在Angular中，在所选选项上设置其他选项的默认值

题：
如何将选定的sizes作为索引来映射并显示正确的price和tsin eq到sizes索引



注意：


我正在尝试在尺寸，价格，tsin之间建立关系

  "Black": {
    "sizes": "X Small, Small",
    "prices": '$22.24, $24.94',
    "tsin": "111002, 111003"
  },

例如如果选择了黑色，并且所选尺寸的大小为索引[0]（或-X小），则在ng更改时，价格将更新为$ 22.24，tsin为111002



更新：
我已经更新了小提琴，使其更接近了，但是原型继承不存在。我只是想说明预期的效果

UPDATED JSFiddle

更新2倍
Callebe给了我一个解决方案，使我离得更近，但仍然不希望或无法正常工作

JSFiddle

我有一个简单的控制器，其中有一些来自$ http的虚假数据：

var app = angular.module("app", []);

app.controller('Ctrl', function ($scope, $filter, $http) {
    //lowest price is coming in from the init api request on production
    var lowestPrice = '$21.24';
    // exposes currentPrice to the view
    $scope.currentPrice = lowestPrice;

    // function to change the currentPrice to the selected Products price
    $scope.getCurrentPrice = function(idx) {
          $scope.currentPrice = idx;
    }
 //fake data that simulates a piece of the json object response.
 $scope.productData = {
  "colors_and_sizes": {
    "data": {
      "Black": {
        "prices": '$21.24, $29.94',
        "swatch_image": 'http://lorempixel.com/50/50',
        "sizes": "X Small, Small",
        "prices": '$22.24, $24.94',
        "tsin": "111002, 111003"
      },
      "Blue": {

        "swatch_image": 'http://lorempixel.com/50/51',
        "sizes": "X Small, Small",
        "prices": '$22.24, $24.94',
        "tsin": "112005, 112007"
      }
    }
  }
};

});

注意：


我知道我知道，对于我想做的事情，数据输入非常糟糕。


sizes prices and tsin是字符串。但是，当我进入视图时，我将它们拆分了：

<form ng-app="app" ng-controller="Ctrl" ng-init="item = this">
    <div class="color-pick"
         ng-repeat="(key, val) in productData.colors_and_sizes.data track by $index">
        <input
             type="radio"
             name="colors"
             hidden="true"
             ng-model="item.myColor"
             ng-value="key" />

        <img
             ng-click="item.myColor = key"
             ng-src="{{val.swatch_image}}"
             alt="">
        {{key}}

        <div class="size-pick" ng-show="item.myColor==key">
            <select
                ng-model="item.mySize"

                <!--split the sizes into an array call it choice -->
                <!--idx as choice  could be idx to get key but then breaks the value cannot do (idx, choice) as choice for (idx, choice) in val.sizes.split(',') -->
                ng-options="choice as choice for (idx, choice) in val.sizes.split(',')">
                <option value="">Please select a size</option>

                ng-change="setCurrentPrice(val.sizes.split(',')[idx])"
            </select>
        </div>

    </div>
</form>

最后，我希望在视图上显示4个值：

mySize: {{ item.mySize}}
myColor: {{item.myColor}}
myPrice: {{item.currentPrice}}
myTsin: {{item.myTsin}}

再次请检查我的（以上老版本更新）JSfiddle

最佳答案

简单看看这个

Working Demo

html

<select ng-model="item.mySize" ng-change="setCurrentPrice(val.sizes.split(','),val.prices.split(','),val.tsin.split(','))" ng-options="choice as choice for (idx, choice) in val.sizes.split(',')">
     <option value="">Please select a size</option>
</select>

脚本

$scope.setCurrentPrice = function(sizes, prices, tsin) {
        var index = sizes.indexOf($scope.item.mySize);
        $scope.item.myPrice = prices[index];
        $scope.item.myTsin = tsin[index];
        $scope.item.currentPrice = prices[index];
        $scope.item.mySize = sizes[index];
    };