从ExtJS 4中的定制模型类扩展 [英] Extend from custom model class in ExtJS 4
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问题描述
如何从extjs中的定制模型扩展。
How to extend from custom model in extjs.
当我将在下面的示例中引用BusinessUser类的字段时,是否有任何可以直接关联User和BusinessUser字段的方法。
Is there any method which can directly club the fields of User and BusinessUser fields when I'll refer the fields from BusinessUser class in example below.
Ext.define('User', {
extend: 'Ext.data.Model',
fields: [
{name: 'name', type: 'string'},
{name: 'age', type: 'int'},
{name: 'phone', type: 'string'},
{name: 'alive', type: 'boolean', defaultValue: true}
],
});
Ext.define('BusinessUser', {
extend: 'User',
fields: [
{name: 'businessType', type: 'string'},
{name: 'company', type: 'string'}
],
});
推荐答案
您不需要手动加入字段它自动完成。根据您的问题检查代码中的输出:
You don't need to join the fields manually because it's done automatically. Check the outputs in the code bellow based on your question:
Ext.define('User', {
extend: 'Ext.data.Model',
fields: [
{name: 'name', type: 'string'},
{name: 'age', type: 'int'},
{name: 'phone', type: 'string'},
{name: 'alive', type: 'boolean', defaultValue: true}
],
});
Ext.define('BusinessUser', {
extend: 'User',
fields: [
{name: 'businessType', type: 'string'},
{name: 'company', type: 'string'}
],
});
// instantiating a User object
var u = Ext.create('BusinessUser', {
name: 'John Doe',
age: 30,
phone: '555-5555'
});
// instantiating a BusinessUser object
var bu = Ext.create('BusinessUser', {
name: 'Jane Doe',
age: 40,
phone: '555-5556',
businessType: 'analyst',
company: 'ACME'
});
console.log(Ext.getClassName(bu)); // "BusinessUser"
console.log(Ext.getClassName(u)); // "User"
console.log(u instanceof User); // true
console.log(bu instanceof User); // true
console.log(u instanceof BusinessUser); // false
console.log(bu instanceof BusinessUser); // true
console.log(u instanceof Ext.data.Model); // true
console.log(bu instanceof Ext.data.Model); // true
console.log(u instanceof Ext.data.Store); // false, just to check if it's not returning true for anything
console.log(bu instanceof Ext.data.Store); // false
console.log("name" in u.data); // true
console.log("name" in bu.data); // true
console.log("company" in u.data); // false
console.log("company" in bu.data); // true
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