如何在AngularJS中向嵌套数组添加对象?

I'm new to AngularJS. I've researched the theory behind ng-repeats but I cannot find any good examples of 2-way data binding or object creation for nested ng-repeats. I understand that the syntax has changed in recent versions. I'm using 1.1.5.

我新AngularJS。我研究过ng-repeat背后的理论，但是我找不到任何关于双向数据绑定或为嵌套ng-repeat创建对象的好例子。我理解在最近的版本中语法发生了变化。我用1.1.5。

I have post objects that have a nested array of comment objects. I want to be able to add new comment objects to the array of comments in the post. I've tried lots of different versions.

我发布了具有嵌套注释对象数组的对象。我希望能够向post中的注释数组添加新的注释对象。我试过很多不同的版本。

This is my HTML:

这是我的HTML:

<div id='posts' ng-controller="PostsCtrl">

      <ul>
          <div id='post' ng-repeat="post in posts track by post.id">
              <div id='postMedia'>
              <img ng-click="" ng-src={{post.attachment}} />
              </div>
              <div ng-click="">
                  <div ng-click="">{{post.message}}</div>
                  <div ng-click="">{{post.created_at}}</div>
              </div>
          <h1>Comments</h1>
          <div id='comment' ng-repeat="comment in post.comments track by post.comment.id">
              <div ng-click="">{{comment.body}}</div>
          </div>
          <form ng-submit="addComment()">
            <input id="body" type="text" placeholder="Reply…" ng-model="post.comment.body">
            <input type="submit" value="Add">
          </form>
          </div>
      </ul>
    </div>

This is the controller:

这是控制器:

myApp.controller('PostsCtrl', ['$scope', 'angularFire',
function MyCtrl($scope, angularFire) {
var url = 'https://inviter-dev.firebaseio.com/posts';
$scope.items = angularFire(url, $scope, 'posts',  {});
$scope.commentProp = 'comments';

$scope.addComment = function() {
    $scope.comments.push($scope.newcomment);
}

  }
]);

SOLUTION:

解决方案:

Thanks to Chandermani answer for solving this. I modified the controller slightly because I wanted the to use a key called body in the data store -

感谢Chandermani解决这个问题的答案。我稍微修改了控制器，因为我希望在数据存储中使用一个名为body的键

myApp.controller('PostsCtrl', ['$scope', 'angularFire',
function MyCtrl($scope, angularFire) {
var url = 'https://inviter-dev.firebaseio.com/posts';
$scope.items = angularFire(url, $scope, 'posts',  [] );

$scope.addComment = function(post,comment) {
    post.comments.push({body:comment});
}

}

]);

1 个解决方案

#1

The problem with you addComment method is that it does not know which post it needs to add comment to. Also the comment input that is part of you ng-repeat for comments can have a independent model which can be passed to the controller method.

addComment方法的问题是，它不知道需要向哪个post添加注释。另外，作为注释ng-repeat的一部分的注释输入可以有一个独立的模型，可以传递给controller方法。

You need to make the following changes. In html

您需要做以下更改。在html中

<form ng-submit="addComment(post,commentData)">
   <input id="body" type="text" placeholder="Reply…" ng-model="commentData">
   <input type="submit" value="Add">
</form>

In your controller

在你的控制器

$scope.addComment = function(post,comment) {
    post.comments.push(comment);
}

#1