通过 Angular 中的子作用域更新父作用域

Question

<div class="full-row" ng-repeat="row in pendingRequests | orderBy: '-modificationDate' | partition:3">
                      <div class="one-third" ng-repeat="request in row track by request.id">
                          <div class="incoming_request" ng-class="actionClass(request)">
                              <div class="request_comments">
                                  <hr>
                                  <p><span>Recipients:</span></p>
                                  <div class="comments">
                                      <p ng-repeat="comment in request.comments track by comment.id" class="dont-break-out">
                                          <span class="author" ng-bind="comment.userName | employeeName">:</span>
                                          {{comment.text}}
                                          <span ng-if="comment.status == State.APPROVED" class="approval success" ng-click="changestatus(comment, request)"><i class="fa fa-check"></i></span>
                                          <span ng-if="comment.status == State.REJECTED" class="approval error" ng-click="changestatus(comment, request)"><i class="fa fa-times"></i></span>
                                          <span ng-if="comment.status == State.PENDING" class="approval" ng-click="changestatus(comment, request)" title="{{showApproveTooltip(comment)?'Click to approve the request on behalf of this user':''}}"><i class="fa fa-clock-o"></i></span>
                                      </p>
                                  </div>
                              </div>
                              <div class="request_resolve">
                                  <hr>
                                  <div class="textarea-holder">
                                      <textarea placeholder="Your comment..." ng-model="request.newComment" ng-model-options="{ updateOn: 'default blur'}"></textarea>
                                  </div>
                                  <div class="button-container">
                                      <button ng-click="approve(request);" ng-disabled="request.isProcessing" class="btn btn-primary" am-hide-request-resolve-div>Confirm<i ng-hide="request.isProcessing" class="fa fa-check"></i><span ng-show="request.isProcessing" class="spinner no-hover"><a><i class="fa-li fa fa-spinner fa-spin"></i></a></span></button>
                                      <button ng-click="reject(request);" ng-disabled="request.isProcessing" class="btn btn-default pull-right" am-hide-request-resolve-div>Reject <i class="fa fa-times"></i></button>
                                  </div>
                              </div>

这里是和平的代码。如您所见，有很多ng-repeats。我的pendingRequests 收藏经常从服务器更新。 3 次或更多更新后，当我单击某个按钮时，UI 上什么也没有发生。

详情：

在批准点击时，我将status 更改为一个comment。

$scope.approve  = function (request) {
        var currentUserComment = request.comments.filter(function(comm) {
                return comm.userId == user.id && comm.status == "Pending";
            })[0];
        currentUserComment.status = State.APPROVED; // change comments Status
        currentUserComment.text = request.newComment;

        delete request.newComment;

        if (!currentUserComment) {
            request.isProcessing = false;
            return;
        }

        Comments.update(currentUserComment, function() {
            // $rootScope.$broadcast('daysUpdated');   
        });

        request.isProcessing = false;
    };

这必须显示这个跨度<span ng-if="comment.status == State.APPROVED" class="approval success" ng-click="changestatus(comment, request)"><i class="fa fa-check"></i></span>，因为现在状态等于State.APPROVED。但是什么也没发生。

经过一些研究，我认为这一切都是因为 ng-repeat 和收藏更新。

ng-repeat 为每个项目创建一个子范围，因此正在运行的范围可能如下所示：

bookCtrl scope = { tags: ['foo', 'bar', 'baz' ] }

ng-repeat 子作用域：{ tag: 'foo' }, { tag: 'bar' }, { tag: 'baz' }

所以当我为某些request 更新comment.status 时，Angular 不知道它存在于什么范围内。

我说的对吗？我该如何解决我的问题（更改评论状态后显示正确的跨度）？

---

更简单的代码：

<div ng-repeat="request in requests">
      <div ng-repeat="comment in request.comments">
            <span ng-if="comment.status == State.APPROVED" class="approval success"><i class="fa fa-check"></i></span>
            <span ng-if="comment.status == State.REJECTED" class="approval error"><i class="fa fa-times"></i></span>
            <span ng-if="comment.status == State.PENDING" class="approval"><i class="fa fa-clock-o"></i></span>
      </div>
      <div>
          <button ng-click="approve(request)">
            Approve
          </button>
      </div>
    </div>

并批准功能：

var user = LoggeInUser(); // some user who is loggedIn now
$scope.approve = function(request){
            var currentUserComment = request.comments.filter(function(comm)                        {
            return comm.userId == user.id && comm.status == "Pending";
        })[0];
    currentUserComment.status = State.APPROVED; // change comments Status

    Comments.update(currentUserComment, function() { // send PUT request to API
        // $rootScope.$broadcast('daysUpdated');   
    });
}

Answer 1

您可能会在将函数移至 $scope.functions.functionName 中找到解决方案。正如您在声明中提到的那样，我相信通过审查这一点，您遇到了范围界定问题。

JS

$scope.functions.approve = function () { ... }

HTML

functions.approve(request)

您也可以看看使用控制器，有时这会有所帮助：

https://docs.angularjs.org/api/ng/directive/ngController