Sencha Touch - 扩展存储 - 构造函数调用

Question

我正在玩 sencha 并创建了一个包含商店和模型的列表：

main:

Ext.Loader.setConfig({enabled: true});

Ext.application({ 
viewport: {
    autoMaximize: false
},                                                                                                                                                                 
name: 'Sencha',                                                                                                                                                                  

launch: function() {     
    Ext.create('Ext.List', {
        fullscreen: true,

        store: Ext.create('store.Test', {
        }),

        itemTpl: '{lastName}, {firstName} Age: {age}'
    });
}                                                                                          
});

store:

Ext.define('store.Test', {
extend: 'Ext.data.Store',

model: 'model.User',
data: [
    { firstName: 'Ed',    lastName: 'Spencer', age: 30 },
    { firstName: 'Tommy', lastName: 'Maintz', age: 41 },
    { firstName: 'Aaron', lastName: 'Conran', age: 24 },
    { firstName: 'Jamie', lastName: 'Avins', age: 76 }
]
});

model:

Ext.define('model.User', {
extend: 'Ext.data.Model',
fields: [
    { name: 'firstName', type: 'string' },
    { name: 'lastName', type: 'string' }
]
});

到目前为止，一切正常。

然后我创建了第二家商店，其中有另一个字段“年龄”。我现在想要的是将参数“模型”传递给商店，以便能够在不同模型之间“切换”。 我尝试了这样的操作：

store:

Ext.define('store.Test', {
extend: 'Ext.data.Store',
myModel: null,

constructor : function(model) {
    myModel = model;
}, 

model: this.myModel,

data: [
    { firstName: 'Ed',    lastName: 'Spencer', age: 30 },
    { firstName: 'Tommy', lastName: 'Maintz', age: 41 },
    { firstName: 'Aaron', lastName: 'Conran', age: 24 },
    { firstName: 'Jamie', lastName: 'Avins', age: 76 }
]
});

并在主文件中：

[...]
        store: Ext.create('store.Test', {
           model: 'model.UserWithAge'
        }),
[...]

但 Google Chrome 给了我：

Uncaught TypeError: Object [object Object],[object Object],[object Object],[object Object] has no method 'getRange'

有什么提示我做错了什么吗？

Answer 1

没关系，这比我想象的要容易得多。
不用搞乱构造函数或类似的东西，只需在创建商店时传递模型就足够了，就像我所做的那样：

main:

[...]
    store: Ext.create('store.Test', {
       model: 'model.UserWithAge'
    }),
[...]

store:

Ext.define('store.Test', {
extend: 'Ext.data.Store',

model: 'model.User', //only set in case that model is not passed when created

data: [
    { firstName: 'Ed',    lastName: 'Spencer', age: 30 },
    { firstName: 'Tommy', lastName: 'Maintz', age: 41 },
    { firstName: 'Aaron', lastName: 'Conran', age: 24 },
    { firstName: 'Jamie', lastName: 'Avins', age: 76 }
]

});