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javascript - ng-model 作为 ng-init 输入的值

问题描述

我试图弄清楚如何根据我的另一个输入的 ng-model 设置输入的值，这是我所做的：

angular.module('selectExample', [])
  .controller('ExampleController', ['$scope', function($scope) {
    $scope.register = {
      regData: {
        branch: {},
      },
      bloodbankchapters: [
        {_id:'5c014c999cc48c3b0057988b', chapter_name:"AB"},
        {_id:'5c014c999cc48c3b0057988c', chapter_name:"A"},
      ],
    };
  }]);
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<div ng-app="selectExample" ng-controller="ExampleController">

  <select ng-model="register.regData.branch" ng-options ="chapter.chapter_name for chapter in register.bloodbankchapters track by chapter._id">
    <option ng-repeat="chapter in register.bloodbankchapters" >{{chapter.chapter_name}}</option>
  </select>
  <div>{{register.regData.branch.chapter_name}}</div>
  
  <input type="text" ng-model="register.regData.branch_name" name="branch_name"  ng-init="register.regData.branch_name='{{register.regData.branch.chapter_name}}'"> 
  
</div>

如您所见，我的第二个输入字面上显示{{register.regData.branch.chapter_name}}而不是显示chapter_name，如何在第二个输入中显示章节名称？

标签： javascriptangularjsmean-stack

解决方案

HTML 有细微的变化。你可以参考JsFiddle

<div ng-app="selectExample" ng-controller="ExampleController">

  <select ng-model="register.regData.branch" ng-options ="chapter.chapter_name for chapter in register.bloodbankchapters" ng-change="register.regData.branch_name=register.regData.branch.chapter_name">
    <option ng-repeat="chapter in register.bloodbankchapters" >{{chapter.chapter_name}}</option>
  </select>
  <div>{{register.regData.branch.chapter_name}}</div>

  <input type="text" ng-model="register.regData.branch_name" name="branch_name"> 

</div>

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