Backbone.js的未捕获类型错误：对象[对象数组]有“开”都没法 [英] Backbone.js Uncaught TypeError: Object [object Array] has no method 'on'

问题描述

谁能帮我这个吗？我不知道发生了什么事情错了。

Can anyone help me with this one? I don't know what's going wrong.

从JSON文件获取数据：

Getting data from a json file:

this.categoryTrees = new CategoryTrees();
this.categoryTrees.getCategoryTreesFromJSON();

this.categories = new Categories();
this.categories.getCategoriesFromJSON();

为它创建视图：

//view for startscreen
this.startscreenView = new StartscreenView({collection: this.categoryTrees});

//view for subjectsList
this.subjectsListView = new SubjectsListView({collection: this.categories.where({ category_tree : "onderwerpen" }) });

与第二个where子句给我一个错误：未捕获类型错误：对象[对象数组]有'对'都没法

The second one with the where clause gives me an error: Uncaught TypeError: Object [object Array] has no method 'on'

当我不忍受它工作得很好where子句。在控制台我能够没有任何问题执行，其中的功能。

When I don't put up the where clause it works just fine. In console I am able to perform the where function without any problems.

我怀念这里的东西吗？

推荐答案

，其中方法将返回所有集合中匹配传入属性的模型的数组。因此，它不返回 Backbone.Collection 让您获得在未定义的错误。

The where method will return an array of all the models in a collection that match the passed attributes. So it doesn't return a Backbone.Collection so you get the on undefined error.

您需要从结果创建一个新的类别集合其中，与

You need to create a new Categories collection from the result of the where with :

this.subjectsListView = new SubjectsListView({
    collection: new Categories(
        this.categories.where({ category_tree : "onderwerpen" })) 
});

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