This is a static class containing the system-supplied data types which may be given to a Field.

Types是一个静态类,包含将用在Field的,系统提供的数据类型。

The properties in this class are used as type indicators in the Field class, so to test whether a Field is of a certain type, compare the type property against properties of this class.

此类中的属性会被用作Field中的类型指示器,因此,如果要测试一个字段是否某个特定类型,可将其type属性与Types类的属性来比较。

Developers may add their own application-specific data types to this class. Definition names must be UPPERCASE. Each type definition must contain three properties:

开发者可以添加它们自定义的类型到这个类中。名称必须大写。每个类型定义必需包含三个属性:

  • convert : Function  转换函数
    A function to convert raw data values from a data block into the data to be stored in the Field. The function is passed the collowing parameters:此函数转数据块中的原始数据到Field字段。函数会被传入两个参数:

    • v : Mixed
      The data value as read by the Reader, if undefined will use the configured defaultValue. 被reader读取的数据,如果未定义则使用defaultValue
    • rec : Mixed
      The data object containing the row as read by the Reader. Depending on the Reader type, this could be an Array (ArrayReader), an object (JsonReader), or an XML element.  reader读取到的当前行数据对象。依赖reader的类型,这可以是一个数组(ArrayReader),对象 (JsonReader),或者xml 元素。
  • sortType : Function  排序类型
    A function to convert the stored data into comparable form, as defined by Ext.data.SortTypes.  一个函数,将数据转换为可比较的形式,详见 Ext.data.SortTypes.

  • type : String  类型
    A textual data type name.   文本形式的类型名称。

For example, to create a VELatLong field (See the Microsoft Bing Mapping API) containing the latitude/longitude value of a datapoint on a map from a JsonReader data block

which contained the properties lat and long, you would define a new data type like this:

例如,我们创建一个VELatLong 字段(参考 Microsoft Bing Mapping API)包含地图上一个数据点的经度/维度值,数据来自JsonReader 的数据块,包含了lat和long属性。对此,你可以定义一个如下的新数据类型:

// Add a new Field data type which stores a VELatLong object in the Record.
Ext.data.Types.VELATLONG = {
convert: function(v, data) {
return new VELatLong(data.lat, data.long);
},
sortType: function(v) {
return v.Latitude; // When sorting, order by latitude
},
type: 'VELatLong'
};

Then, when declaring a Model, use:

然后,我们定义一个模型来使用:

var types = Ext.data.Types; // allow shorthand type access
Ext.define('Unit',
extend: 'Ext.data.Model',
fields: [
{ name: 'unitName', mapping: 'UnitName' },
{ name: 'curSpeed', mapping: 'CurSpeed', type: types.INT },
{ name: 'latitude', mapping: 'lat', type: types.FLOAT },
{ name: 'longitude', mapping: 'long', type: types.FLOAT },
{ name: 'position', type: types.VELATLONG }
]
});

数据类型

This data type means that no conversion is applied to the raw data before it is placed into a Record.不会发生转换

This data type means that the raw data is converted into a boolean before it is placed into a Record. ...   
 
This data type means that the raw data is converted into a boolean before it is placed into a Record. ...
 
This data type means that the raw data is converted into a Date before it is placed into a Record. ...
 
This data type means that the raw data is converted into a number before it is placed into a Record. ...
 
This data type means that the raw data is converted into an integer before it is placed into a Record. ...
 
This data type means that the raw data is converted into an integer before it is placed into a Record. ...
 
This data type means that the raw data is converted into a number before it is placed into a Record. ...
 

This data type means that the raw data is converted into a String before it is placed into a Record.

 
A regular expression for stripping non-numeric characters from a numeric value. ...

ExtJS笔记 Ext.data.Types的更多相关文章

  1. ExtJS笔记 Ext.data.Model

    A Model represents some object that your application manages. For example, one might define a Model ...

  2. 20. Extjs学习笔记——Ext.data.JsonStore使用说明

    Ext.data.JsonStore继承于Ext.data.Store,使得从远程JSON数据创建stores更为方便的简单辅助类.JsonStore合成了Ext.data.HttpProxy与Ext ...

  3. Extjs学习笔记——Ext.data.JsonStore使用说明

    Ext.data.JsonStore继承于Ext.data.Store.使得从远程JSON数据创建stores更为方便的简单辅助类. JsonStore合成了Ext.data.HttpProxy与Ex ...

  4. extJS 中 ext.data 介绍

    ext.data 最主要的功能是获取和组织数据结构,并和特定控件联系起来,于是,Ext.data成了数据的来源,负责显示数据. Ext.data在命名空间中定义了一系列store.reader和pro ...

  5. ExtJS笔记 Ext.Loader

    Ext.Loader is the heart of the new dynamic dependency loading capability in Ext JS 4+. It is most co ...

  6. extjs笔记

      1.    ExtJs 结构树.. 2 2.    对ExtJs的态度.. 3 3.    Ext.form概述.. 4 4.    Ext.TabPanel篇.. 5 5.    Functio ...

  7. 48.EXt.Data.JsonReader()

    转自:https://blog.csdn.net/huoyanxueren/article/details/2662915?utm_source=blogxgwz6 extJs 2.1学习笔记(Ext ...

  8. ExtJs Ext.data.Model 学习笔记

    Using a Proxy Ext.define('User', { extend: 'Ext.data.Model', fields: ['id', 'name', 'email'], proxy: ...

  9. Extjs 项目中常用的小技巧,也许你用得着(5)--设置 Ext.data.Store 传参的请求方式

    1.extjs 给怎么给panel设背景色 设置bodyStyle:'background:#ffc;padding:10px;', var resultsPanel = Ext.create('Ex ...

随机推荐

  1. ToolStripMenuItem

    MenuStrip 类 为窗体提供菜单系统. 继承层次结构 System.Object  System.MarshalByRefObject    System.ComponentModel.Comp ...

  2. Java高并发同步Volatile的使用

    引言: 在多线程并发编程中synchronized和Volatile都扮演着重要的角色,Volatile是轻量级的synchronized,它在多处理器开发中保证了共享变量的“可见性”. 可见性的意思 ...

  3. iterator接口

    Iterator用来做遍历,所有实现Collection接口的容器都有一个Iterator的方法以返回一个Iterator接口的对象

  4. espcms内容页上下篇按后台手动排序号

    模板文件: {%get name=plist class="did":$read.did,pid:$read.pid%} <li class="fl"&g ...

  5. Reverse Integer

    Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 public cl ...

  6. windows7 启用管理员账户

    在虚拟机中安装了windows7,方便使用qq,使用百度云,office等常用的软件.虚拟机使用的oracle的VirtualBox,个人使用体验不错,最棒的功能是能将物理机中的磁盘映射到虚拟机中网络 ...

  7. LVS集群之DR模式 实现

    ps:做 dr 模式 之前,先把之前做过的操作清空掉 1.ipvsadm -ln 查看规则 2.ipvsadm -C 清空规则 3.ipvsadm -ln 确认 4.iptables -t nat - ...

  8. DIV+CSS 清除浮动方法总结

    DIV+CSS 清除浮动是页面布局中常见的问题,相信各位高手也都有自己的方法,今天在这里对常见的几种方法进行总结(PS:谈不上是原创,这里是我自己做的归纳总结,也是我自己内化的过程),希望对您能够有所 ...

  9. SharePoint 2013 Apps TokenHelper SharePointContext OAuth Provider-Hosted App (抄袭,测试 csc.rsp 用)

    namespace Microshaoft.SharePointApps { using Microsoft.IdentityModel; using Microsoft.IdentityModel. ...

  10. 12 自定义标签/JSTL标签库/web国际化/java web之设计模式和案例

    EL应用      自定义一个标签,实现两个字符串的相加 1回顾      1.1servlet生命周期           init(ServletConfig)           service ...