值轉換數組字符串的Javascript

Question

我使用的Javascript角JS，在我的控制，我有以下項目：

$scope.address = []; 
$scope.states = [ 
    { name:"State 1", cities:[ "City Mexico 1", "City Mexico 2","City Mexico 3"] }, 
    { name:"State 2", cities:["City 1", "City 2", "City 3"] } 
    ]; 

在我看來，我做的：

<select ng-model="address.state" placeholder="Estado" > 
      <option ng-repeat="state in states" value="{{state}}"> {{state.name}}</option> 
      </select> 

如果我選擇一個選項，然後我做console.log（address.state）我得到的對象作爲一個字符串，而不是數組。我怎樣才能得到對象作爲數組（JSON）。

控制檯輸出是這樣的：

[state: "{"name":"State 1","cities":["City Mexico 1","City Mexico 2","City Mexico 3"]}"] 

我想要得到的對象數組，因爲那時候我做$ Scope.address.state.city

Answer 1

而不是做對的ng-repeat<option>標籤，你可以在<select>標籤做ng-options：

<select ng-model="address.state" ng-options="state.name for state in states" placeholder="Estados"></select> 

這樣，國家的目標是PA ssed爲$scope.address，你可以做$scope.address.state.cities

工作例如：https://plnkr.co/edit/k2gK5GNEt2xTrMbwih7V?p=preview