EXT4 TreeStroe 如何取消根节点

Question

TreeStroe load 时除了正常请求外还附带了一个node=root的请求，如何取消该请求？

Console：
GET http://localhost:8080/Accordion/treenode/view.action?_dc=1341394277181&node=root 400 (Bad Request) ext-all-debug.js:17836

VIEW CODE:

[js]
initComponent: function() {
var me = this;
...
callback: function(records,operation,success){
for ( var i = 0; i < this.data.length; i++) {
me.add(Ext.create("Ext.tree.Panel", {
title : ''+this.getAt(i).data.nodename+'',
iconCls : 'node-'+i,
rootVisible : false,
viewConfig : {loadingText : "Menu Loading.."},
store : Ext.create('PersonMani.store.TreeNodes').load({
params: {tpid: this.getAt(i).data.id}
})
}));
...
});
me.callParent(arguments);
}
[/js]

STORE CODE:

[js]
Ext.define('PersonMani.store.TreeNodes', {
extend: 'Ext.data.TreeStore',
requires: 'PersonMani.model.TreeNode',

model: 'PersonMani.model.TreeNode',

proxy: {
    type: 'ajax',
    api: {
        read : 'treenode/view.action'
    },
    reader: {
        type: 'json',
        root: 'data',
        successProperty: 'success'
    },
    root: {
        id: 'rootNode',
        text: 'Root',
        expanded: false,
        rootVisible:false,
    },
    listeners: {
        exception: function(proxy, response, operation){
            Ext.MessageBox.show({
                title: 'REMOTE EXCEPTION',
                msg: operation.getError(),
                icon: Ext.MessageBox.ERROR,
                buttons: Ext.Msg.OK
            });
        }
    }
}

});
[/js]

Answer 1

treestore再请求时会默认携带参数 参数名是nodeParam定义的值
请看treestore的源码：
[code="java"] load: function(options) {
options = options || {};
options.params = options.params || {};

    var me = this,
        node = options.node || me.tree.getRootNode(),
        root;

    // If there is not a node it means the user hasnt defined a rootnode yet. In this case lets just
    // create one for them.
    if (!node) {
        node = me.setRootNode({
            expanded: true
        }, true);
    }

    if (me.clearOnLoad) {
        if(me.clearRemovedOnLoad) {
            // clear from the removed array any nodes that were descendants of the node being reloaded so that they do not get saved on next sync.
            me.clearRemoved(node);
        }
        // temporarily remove the onNodeRemove event listener so that when removeAll is called, the removed nodes do not get added to the removed array
        me.tree.un('remove', me.onNodeRemove, me);
        // remove all the nodes
        node.removeAll(false);
        // reattach the onNodeRemove listener
        me.tree.on('remove', me.onNodeRemove, me);
    }

    Ext.applyIf(options, {
        node: node
    });
    options.params[me.nodeParam] = node ? node.getId() : 'root'; //这行就看出来了 携带参数了 你可以重写load方法 在这行做判断是否加参数 

    if (node) {
        node.set('loading', true);
    }

    return me.callParent([options]);
},[/code]

到此解决携带参数问题