错误：'this.proxy'为空或不是EXTJS中的对象 [英] Error: 'this.proxy' is null or not an object in EXTJS

问题描述

当我运行这个EXTJS代码时，我收到一个错误'this.proxy'为null或不是一个对象。你能帮我解决这个问题吗？

When i ran this EXTJS code,i got an error 'this.proxy' is null or not an object. Can you help me out regarding this,plzz ?

var myData = [
                   ['J', 'MD'],
                   ['A', 'VA'],
                   ['S', 'DC'],
                   ['M', 'DE'],
                   ['B', 'NJ'],
                   ['N', 'CA'],
                   ['S', 'RT'],
                   ['S', 'CG']
                 ];
 var store = new Ext.data.ArrayStore({
        totalProperty : 8,
        autoLoad : {
            params : {
                start : 0,
                limit : 4
            }
        },
        fields : [ {
            name : 'fullName'
        }, {
            name : 'state'
        } ]
    });

 store.loadData(myData);
 var grid = new Ext.grid.GridPanel({
    store : store,
    columns : [ {
        id : 'fullName',
        header : "FullName",
        width : 160,
        sortable : true,
        dataIndex : 'fullName'
    }, {
        header : "State",
        width : 75,
        sortable : true,
        dataIndex : 'state'
    } ],
    stripeRows : true,
    autoExpandColumn : 'fullName',
    height : 350,
    width : 600,
    title : 'Array Grid',
    bbar : new Ext.PagingToolbar({
        store : store,
        pageSize : 4,
        displayInfo : true
    }),
    viewConfig : {
        forceFit : true
    }
 });

推荐答案

您不能同时使用内存代理和 autoLoad config以及 store.load 。 autoLoad config和 store.load 只能用于实际加载数据的代理，如 Ajax 代理。

You cannot at the same time use memory proxy and autoLoad config as well as store.load. autoLoad config and store.load can only be used with proxies that are intended for actual loading of data like Ajax proxy.

但是，您可以使用 Direct 代理。在这种情况下，您将必须创建直接函数，这将扮演服务器端的角色。

However, you can use Direct proxy. In this case you will have to create your direct-function which will play role of server-side.

var myData = [
['J', 'MD'],
...
];
var myDirectfn = function(opts, fn, proxy){
  var start = opts.start, end = opts.page*opts.limit;
  var data = [];
  if (end > myData.length)
    end = myData.length;
  for (var i = start; i < end; i++)
    data.push(myData[i]);
  fn(0, {status: true, result: data});
};

//Why am I doing this? I don't know, but otherwise store will throw exception
myDirectfn.directCfg={method : {}};

var store = new Ext.data.Store({
  //totalProperty : 8, 
  pageSize: 4,
  proxy: {
    type: 'direct',
    directFn: myDirectfn,
    reader: {type: 'array'}
  },
  fields : [ {name : 'fullName'}, {name : 'state'} ]
});

And

And here is fiddle to play arround with.

更新

对于extjs3直接代理方法将如下所示：

For extjs3 Direct Proxy method would look like this:

var myDirectfn = function(opts, fn, proxy) {
    var start = opts.start,
        end = opts.limit+opts.start,
        data = [];
    if (end > myData.length) end = myData.length;
    for (var i = start; i < end; i++)
        data.push(myData[i]);
    data.total = myData.length;
    fn(data, {
        status: true,
        result: data
    });
};
myDirectfn.directCfg = {
    method: {len:1}
};
var store = new Ext.data.ArrayStore({
    proxy: new Ext.data.DirectProxy({
        directFn: myDirectfn
    }),
    fields: [{
        name: 'fullName'},
    {
        name: 'state'}]
})

store.load({params: {start: 0, limit: 4}});

这里是演示。而且看起来您可以使用 load ing使用内存代理，方法是使用这个插件

Here is demo. And also it appears that you can utilise memory proxy with loading by using this plugin

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