正在更新Javascript对象值null

  • Z时代
  • 2024-01-10
  • 分类：问答

我试图通过在每次访问该页面时增加值来在页面上添加“视图”编号。通过AngularJS的 '一（）'正在更新Javascript对象值null

{ 
    _id: "55da051afe08e73168fc7aeb", 
    url: "https://www.youtube.com/watch?v=eUdM9vrCbow", 
    title: "Django Unchained", 
    embedUrl: "https://www.youtube.com/embed/eUdM9vrCbow", 
    __v: 0, 
    downvotes: 0, 
    upvotes: 0, 
    views: 0, 
    created_on: "2015-08-24T13:37:33.951Z", 
    desc: "With the help of his mentor, a slave-turned-bounty hunter sets out to rescue his wife from a brutal Mississippi plantation owner." 
}

我检索此对象的方法：

我有这样的对象

var movie = Movie.one($routeParams.id);

我们的目标是增加该值。目前，我正在做这样的：

movie.views++; 
movie.put();

但是，这并不工作，只是给了我一个空值，而这样做的工作：

movie.views = 10; 
movie.put();

我在做什么错？

回答：

您无法增加null的值，默认情况下将其设置为0（零）。

{ 
    _id: "55da051afe08e73168fc7aeb", 
    url: "https://www.youtube.com/watch?v=eUdM9vrCbow", 
    title: "Django Unchained", 
    embedUrl: "https://www.youtube.com/embed/eUdM9vrCbow", 
    __v: 0, 
    downvotes: 0, 
    upvotes: 0, 
    views: 0, //instead of 'null' 
    created_on: "2015-08-24T13:37:33.951Z", 
    desc: "With the help of his mentor, a slave-turned-bounty hunter sets out to rescue his wife from a brutal Mississippi plantation owner." 
}

回答：

我固定它是这样的：

我没有实际更新像Marc实际对象建议

Movie.one($routeParams.id).get().then(function(response){ 
    response.views++; 
    $http.put("http://localhost:3000/movie/" + $routeParams.id, response); 
});

以上是 正在更新Javascript对象值null 的全部内容， 来源链接： utcz.com/qa/260173.html

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