ExtJs中未重新加载存储

Question

我正在显示器上，我需要绑定一个组合框，但不会重新加载最新数据。只有一个对数据库的调用，此后它使用缓存中的现有存储。如何每次（或至少每次重新打开显示时）从数据库重新加载它。下面是代码。

//store
Ext.define('NetworkStore', {
    extend: 'Ext.data.Store',
    alias: 'NetworkStore',
    fields: ['Id', 'value'],
    storeId: 'NetworkStore', 
    autoLoad: true,
    proxy: {
        type: 'ajax',
        useDefaultXhrHeader: false,
        actionMethods: { create: "POST", read: "GET", update: "POST", destroy: "POST" },
        headers: { 'Content-Type': 'application/x-www-form-urlencode' },
        limitParam: false,
        startParam: false,
        pageParam: false,
        extraParams: {
            Style: 1
        },
        url: 'url',
        reader: {
            type: 'json'
        }
    }
});

xtype: 'combo',
name: 'NetworkIDList',
store: Ext.create('NetworkStore').load({
                    params: {
                        Style: 3
                    }
                }),

Answer 1

lastQuery中的官方文档提供：

    listeners: {
        beforequery: function (qe) {
            delete qe.combo.lastQuery;
        }
    }

这里是完整的源代码：

/**
 * @property {String} lastQuery
 * The value of the match string used to filter the store. Delete this property to force
 * a requery. Example use:
 *
 *     var combo = new Ext.form.field.ComboBox({
 *         ...
 *         queryMode: 'remote',
 *         listeners: {
 *             // delete the previous query in the beforequery event or set
 *             // combo.lastQuery = null (this will reload the store the next time it expands)
 *             beforequery: function(qe){
 *                 delete qe.combo.lastQuery;
 *             }
 *         }
 *     });
 *
 * To make sure the filter in the store is not cleared the first time the ComboBox trigger
 * is used configure the combo with `lastQuery=''`. Example use:
 *
 *     var combo = new Ext.form.field.ComboBox({
 *         ...
 *         queryMode: 'local',
 *         triggerAction: 'all',
 *         lastQuery: ''
 *     });
 */

Answer 2

将所需的逻辑添加到列表expand事件处理程序。

Fiddle

            xtype: 'combo',
            name: 'NetworkIDList',
            listeners: {
                expand: function () {
                    this.getStore().load()
                }
            },
            store: Ext.create('NetworkStore').load({
                params: {
                    Style: 3
                }
            })

Answer 3

如果我们按如下所示传递存储，它将始终从数据库而不是从缓存中获取存储。

  store: {
            type: 'NetworkStore',
            proxy: {
                    extraParams: {
                        Style: 3
                    }
                }
            }

Answer 4

remoteFilter: true

将此属性设置为商店