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AngularJSのngOptionsで表示をカスタマイズするメモ

Posted at

Plunkr

ngOptionsでasなどを使うとオブジェクトのフィールドを選んだりできるが、ちょっと凝ったフォーマットにしたい場合は、スコープのメソッドを使える。

template
  <body ng-controller="TestCtrl as test">
    <select ng-model="test.selectedItem"
      ng-options="item as test.formatItem(item) for item in test.items">
    </select>
  </body>
controller
myApp.controller('TestCtrl',  function() {
  this.items = [
      {name:'foo', age:'25'},
      {name:'bar', age:'14'}
    ];
    
  this.formatItem = function(item) {
    return item.name + ' (' + item.age + ')';
  };
  
  this.selectedItem = null;
});

ngOptionsで、リストのインデックスを使いたい場合、次のように(index, item)のようにすると、indexに配列のインデックスが入る。

template
    <select ng-model="test.selectedItem"
      ng-options="item as test.formatItem(index, item) for (index, item) in test.items">
    </select>
controller
  this.formatItem = function(index, item) {
    return '[' + index + '] ' + item.name + ' (' + item.age + ')';
  };
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