Javascript Backbone：从 JSON 创建集合
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Backbone: Create collection from JSON
提问by pws5068
I'm attempting to load JSON (from php's json_encode) into a Backbone JS collection. I've simplified the problem to:
我正在尝试将 JSON（来自 php 的 json_encode）加载到 Backbone JS 集合中。我已将问题简化为：
var myJSON = '[{ "id":"1","name":"some name","description":"hmmm"}]';
var myCollection = new MyCollection(myJSON, { view: this });
And:
和：
MyObject = Backbone.Model.extend({
id: null,
name: null,
description: null
});
MyCollection = Backbone.Collection.extend({
model: MyObject,
initialize: function (models,options) { }
});
Error:
错误：
Uncaught TypeError: Cannot use 'in' operator to search for 'id' in
未捕获的类型错误：无法使用“in”运算符来搜索“id”
Similar Issue: Backbone: fetch collection from server
类似问题： Backbone：从服务器获取集合
My JSON certainly appears to be in the right format, am I missing something obvious? I have attempted using simply id: "1" as opposed to "id" with the same result.
我的 JSON 看起来肯定是正确的格式，我是否遗漏了一些明显的东西？我曾尝试简单地使用 id: "1" 而不是 "id" 具有相同的结果。
采纳答案by kinakuta
Your JSON is still in string format. Pass it to JSON.parse before assigning it:
您的 JSON 仍然是字符串格式。在分配之前将其传递给 JSON.parse：
var myJSON = JSON.parse('[{"id":1,"name":"some name","description":"hmmm"}]');
回答by Paul
You forgot the defaultshash in your model.
您忘记了defaults模型中的哈希值。
MyObject = Backbone.Model.extend({
defaults: {
id: null,
name: null,
description: null
}
});
See the documentation
查看文档
回答by ErichBSchulz
so i maybe missing the point completely but the problems seems to be the 'single quotes' around the array. That is, this:
所以我可能完全错过了这一点，但问题似乎是数组周围的“单引号”。也就是说，这个：
var myJSON = '[{ "id":"1","name":"some name","description":"hmmm"}]';
should be:
应该：
var myJSON = [{ "id":"1","name":"some name","description":"hmmm"}];
Php, afik, doesn't add the single quotes, so it should be as simple as changing a line that says:
Php，afik，不添加单引号，所以它应该像更改一行一样简单：
$my_js = "var myJSON = '" . json_encode($my_array_to_send)) . "';";
to:
到：
$my_js = "var myJSON = " . json_encode($my_array_to_send)) . "; ";
