knockout：Uncaught TypeError：Object＃< Object>没有方法'newCommentText' [英] knockout: Uncaught TypeError: Object #<Object> has no method 'newCommentText'

问题描述

我的视图模型中有这样的代码：

I have code like this in my view model:

function ChatListViewModel(chats) {
    var self = this;

    self.newCommentText = ko.observable();

    self.addComment = function(chat) {
      var newComment = { CourseItemDescription: this.newCommentText() };
      chat.CommentList.push(newComment);
      self.newCommentText("");       
    };

}

ko.applyBindings(new ChatListViewModel(initialData));

但是当我尝试添加新评论时出现此错误：

but I get this error when I try to add a new comment:

任何想法我做错了什么？我查看了knockoutjs.com网页上的一些淘汰样本，这就是他们的做法。

any Ideas what I'm doing wrong? I looked at some knockout samples on the knockoutjs.com webpage and this is how they were doing it.

推荐答案

试试这个。

self.addComment = function(chat) {
   var newComment = { CourseItemDescription: self.newCommentText() };
   chat.CommentList.push(newComment);
   self.newCommentText("");       
};

你的这个变量不是你所期望的。

Your this variable is not what you expect.

希望这会有所帮助。

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