如何从ExtJs中存储嵌套模型4 [英] How to access nested models from store in ExtJs 4

问题描述

我刚刚下载了ExtJs 4的最终版本，我正在尝试使用新的模型方法来实现一些事情。

I just downloaded the final version of ExtJs 4 and I'm trying to implement some things using new Model approach.

例如我有一个名为SetupModel的模型，它有2个嵌套模型Users，Reports。
我创建新的存储，并且我设置了store = SetupModel的Model属性。

For instance I have a model named SetupModel, it has 2 nested models Users, Reports. I create new store and I set the Model property of the store = SetupModel.

问题是 - 在数据加载到商店后如何访问我的嵌套属性？

The question is - how can I access my nested properties after data was loaded into the store?

I需要像myStore.data.Users（）这样的东西，但不正确。

I need something like myStore.data.Users(), but is incorrect.

任何想法？

推荐答案

当您定义模型时，需要为嵌套模型提供必要的关联。既然，你没有提供你的代码。以下是一个例子：

When you define your model, you need to provide the necessary association with the nested models. Since, you have not provided your code. Here is an example:

我的产品型号：

Product = Ext.define('Product',{
    extend: 'Ext.data.Model',
    fields: [
        {name: 'id', type: 'int'},
        {name: 'user_id', type: 'int'},
        {name: 'name', type: 'string'},
        {name: 'price', type: 'float'}
    ],
    proxy: {
        type: 'localstorage',
        id: 'products'
    }
});

我的用户模型：

User = Ext.define('User',{
    extend: 'Ext.data.Model',
    fields: [
        {name: 'id',       type: 'int'},
        {name: 'name',     type: 'string'},
        {name: 'gender',   type: 'string'},
        {name: 'username', type: 'string'}
    ],
    associations: [
        {type: 'hasMany', model: 'Product', name: 'products'}
    ],
    proxy: {
        type: 'localstorage',
        id  : 'users'
    }
});

现在，如果您有一个具有产品的用户模型实例。以下是如何访问产品：

Now, if you have a instance of User model with products. Here is how you can access the products:

var productStore = user.products();

请注意， user.products（）返回一个 Ext.data.Store 。现在，您可以遍历或过滤或查找您的产品记录。以下是我的第一个产品名称：

Note that user.products() returns a Ext.data.Store. Now, you can traverse or filter or find your product record. Here is how I got my first product's name:

productStore.getAt(0).get('name');

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