Locally paging on Extjs 5 store of type ajax

问题:

I am working on an app where loading all data from the beginning is not really an inconvenient.

I am getting json data from a server through Ajax, and my store for doing that is pretty simple:

Ext.define('MODIFE.store.CentroBeneficio', {
    extend  : 'Ext.data.Store',
    requires : [
        'MODIFE.model.CentroBeneficio'
    ],
    storeId : 'CentroBeneficio',
    model   : 'MODIFE.model.CentroBeneficio',
    page-size: 10,
    proxy   :{
        //type: 'memory',
        type: 'ajax',
        enablePaging: true,
        url: 'http://'+MODIFE.Global.ip+'/CentroBeneficio/GetCentroBeneficios'
    },
    autoLoad: true
});

This is my model:

Ext.define('MODIFE.model.CentroBeneficio', {
    extend: 'Ext.data.Model',
    storeId: 'CentroBeneficio',
    pageSize: 10,
    fields: [
        {name:'IdCentroBeneficio', type:'int'},
        {name:'CompaniaCodigo', type:'int'},
        {name:'codigo', type:'string'},
        {name:'description', type:'string'},
        {name:'complete_description', type:'string', convert : function(v, record) {return record.data.codigo+' - '+record.data.description;}},
        {name:'status', type:'int', convert : function(v, record) {return (record.data.status == 1) ? 'Activo' : 'Inactivo';}},
        {name:'name_compania', type:'string'},
        {name:'pais', type:'string'},
        {name:'IdPais', type:'int'}

    ]
});

What I would like to achieve is paging the already loaded data. I tried specifying the type to 'memory' which didn't load anything as well as 'pagingmemory', wich caused the browser to die (I don't know why).

I have already the paging bar set up on my view:

    {
            xtype: 'grid',
            id: 'centroBeneficioGrid',
            title: getLabelByKey('CentroBeneficio_SearchGridTitle_Listado'),
            store: 'CentroBeneficio',
            columns: [
                { text: getLabelByKey('CentroBeneficio_SearchColumnGrid_Pais'),  dataIndex: 'pais', flex: 2},
                { text: getLabelByKey('CentroBeneficio_SearchColumnGrid_Company'), dataIndex: 'name_compania', flex: 3},
                { text: getLabelByKey('CentroBeneficio_SearchColumnGrid_CentroBeneficio'), dataIndex: 'codigo', flex: 2},
                { text: getLabelByKey('CentroBeneficio_SearchColumnGrid_Descripcion'), dataIndex: 'description', flex: 4},
                { text: getLabelByKey('CentroBeneficio_SearchColumnGrid_Estatus'), dataIndex: 'status', flex: 2}
            ],
            listeners: {
                itemdblclick: 'CBSelectedGrid'
            },
            dockedItems: [{
                xtype: 'pagingtoolbar',
                store: 'CentroBeneficio',
                dock: 'bottom',
                displayInfo: true
            }],
        } 

It shows up correctly but it just loads all data on the first page. Thanks in advance.

回答1:

Paging of already loaded data is achieved with Ext.data.proxy.Memory configured with enablePaging: true. So what you need is to use two stores:

1. "Remote" store to merely load data from the server side;
2. Local paging store configured with memory proxy. The data will be loaded from the remote store once it loads itself:

pagingStore.getProxy().setData(remoteStore.getRange());
pagingStore.load();

Full working example: https://fiddle.sencha.com/#fiddle/pim