如何使用AngularJS从嵌套的JSON中删除(拼接)一个元素

Question

我有一个嵌套的JSON结构如下:

[{
"phone_id" : "1",
"phone_name" : "nokia",
"phone_img" : "/src/imgs/nokia.jpg",
"phone_comments" :
    [
                        {
                            "comment_id" : "1",
                            "user_id" : "32508",
                            "comment_date" : "2001-02-01",
                            "user_comment" : "This was the first phone that was rock solid from Nokia"

                        }, 
                        {
                            "comment_id" : "2",
                            "user_id" : "32518",
                            "comment_date" : "2001-02-02",
                            "user_comment" : "Great phone before the smartphone age"

                        },
                        {
                            "comment_id" : "3",
                            "user_id" : "22550",
                            "comment_date" : "2002-04-01",
                            "user_comment" : "Reminds me of my grandpa's phone"

                        },
                        {
                            "comment_id" : "4",
                            "user_id" : "31099",
                            "comment_date" : "2001-05-11",
                            "user_comment" : "It was a crappy one!"

                        }
                    ]
}
]

显示部分(工作) - 我能够在第一个表格列上显示电话图像,然后在ng-click上加载第二列,其中包含有评论的电话信息.这完全没问题.

删除(不工作) - 我对删除评论有疑问.我不想删除整个手机对象,而只是删除特定的注释.我可以通过像???

remove(comment, $index) 

然后有一个功能,执行以下操作？

$scope.remove = function (index, comments) {
    alert(comments.user_comment + index);
    $scope.comments.splice(index, 1);
}

作为参考,HTML看起来像:

<div ng-app="angularJSApp">
    <div ng-controller="PhoneCtrl">
        <br/><br/><br/>
        <table width="100%" border="1">
            <tr ng-repeat="ph in phones">
                <td width="20%"><a href="#" ng-click="showComments = ! showComments"><img width="50%" ng-src="{{ph.phone_img}}"></a></td>
                <td>
                    <p>Phone Id: {{ph.phone_id}}</p>
                    <p>Phone Name: {{ph.phone_name}}</p>
                    <p>Number of comments: {{ph.phone_comments.length}}</p>

                    <div class="shComments" ng-show="showComments">
                        <p>Search: <input ng-model="query"></p>
                        <table border="1" width="100%">
                            <thead>
                                <tr>
                                    <th><a href="" ng-click="predicate = 'comment_id'; reverse = !reverse">Id</a></th>
                                    <th><a href="" ng-click="predicate = 'user_comment'; reverse = false">Comment</a>
                                        (<a href="" ng-click="predicate = '-user_comment'; reverse = false">^</a>)
                                    </th>
                                    <th><a href="" ng-click="predicate = 'comment_date'; reverse = !reverse">Date</a></th>
                                    <th><a href="" ng-click="predicate = 'user_id'; reverse = !reverse">User</th>
                                    <th></th>
                                </tr>
                            </thead>
                            <tbody>
                                <tr ng-repeat="comment in ph.phone_comments | filter:query | orderBy:predicate:reverse">
                                    <th>{{comment.comment_id}}
                                    <th>{{comment.user_comment}}</th>
                                    <th>{{comment.comment_date}}</th>
                                    <th>{{comment.user_id}}</th>
                                    <th><button ng-click="remove($index, comment)">Remove Comment</button>
                                </tr>
                            </tbody>
                        </table>
                    </div>                  
                </td>
            </tr>
        </table>
    </div>
</div>

PS:我一直在试验AngularJS,我在尽可能多地寻找解决方案后问这个问题.谢谢你的帮助.

Answer 1

除其他外,您可以执行以下操作:

$scope.remove = function (index, comments) {

    delete $scope.comments[index]
}

仔细检查后,您似乎有一个嵌套的数据结构,这意味着您需要两个索引:一个用于电话,另一个用于电话数据结构中的注释.

所以你需要的是一种方法:

$scope.remove = function (pIndex, cIndex) {

    delete $scope.phones[pIndex].phone_comments[cIndex];
}

我提出的另一个建议是,你应该把手机变成一流的公民模型并通过服务来操纵它们.