将模型保存在本地存储中 [英] Saving a model in local storage

问题描述

我正在使用带有Backbone的 Jerome的localStorage 适配器，它非常适合收藏。

I'm using Jerome's localStorage adapter with Backbone and it works great for collections.

但是，现在我有一个我需要保存的模型。所以在我的模型中我设置：

But, now I have a single model that I need to save. So in my model I set:

localStorage: new Store("msg")

然后我进行保存并获取。我的问题是，每当我刷新并初始化我的应用时，我的模型的新表示被添加到localStorage，见下文。

I then do my saves and fetch. My problem is that everytime I do a refresh and initialize my app a new representation of my model is added to localStorage, see below.

我做错了什么？

window.localStorage.msg = {
  // Created after first run
  "1de5770c-1431-3b15-539b-695cedf3a415":{
    "title":"First run",
    "id":"1de5770c-1431-3b15-539b-695cedf3a415"
  },
  // Created after second run
  "26c1fdb7-5803-a61f-ca12-2701dba9a09e":{
    "0":{
      "title":"First run",
      "id":"1de5770c-1431-3b15-539b-695cedf3a415"
    },
      "title":"Second run",
      "id":"26c1fdb7-5803-a61f-ca12-2701dba9a09e"
    }
  }

推荐答案

我遇到了同样的问题。也许你有类似的东西

I ran into same issue. Maybe you have something similar to this

var Settings = Backbone.Model.extend({
  localStorage: new Store("Settings"),
  defaults: { a: 1 }
});

var s = new Settings;
s.fetch();

我改为

var s = new Settings({ id: 1 });

localStorage适配器检查ID如

localStorage adapter check for id like

 case "read":    resp = model.id ? store.find(model) : store.findAll(); break;

所以 0 或因为id无法正常工作，它将返回所有模型中的一个

so 0 or "" for id wont work and it will return all models in one

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