extjs 递归获取指定条件的record

var nodes=treestore.getRootNode().childNodes;
                        function addFirstCls(nodes){
                            if(nodes.length){
                                Ext.Array.forEach(nodes,function(item,index,array){
                                    if(!item.isLeaf()){
                                        addFirstCls(item.childNodes,"approve");
                                    }else{
                                        if(item.data["ApproveState"]=="Y"){
                                            console.log(item);
                                        }
                                    }
                                });
                            }
                        }
                        addFirstCls(nodes);

获取指定条件为item.data["ApproveState"]=="Y" 的记录，本为了找到treeview指定的row 和cell，却如此痛苦，找了一天都为成功！，真不明白为何在此处

用view.getNode(model,true)却无法返回node对象，搞不懂！，还有对treeviewcolumn的如何获取当前列也是头痛，view.getNode(rowIndex)返回却是需要的父行。oh! shit!