var gridCloumn = [
    Ext.create('Ext.grid.RowNumberer',{text: '序号', width: 30}),
    {header: '个数', dataIndex: 'count', width: 70, doSort:function(state) {
        var ds = this.up('grid').getStore();
        var field = this.getSortParam();
        ds.sort({
            property: field,
            direction: state,
            sorterFn: function(v1, v2){
                v1 = v1.get(field);
                v2 = v2.get(field);
                var n1 = new Number(v1);
                var n2 = new Number(v2);
                return n1 > n2 ? 1 : (n1 < n2 ? -1 : 0);
            }
        });
    }}
];

var gridFields = [
    {name: 'id'},
    {name: 'name'},
    {name: 'level',
        sortType: function(value) {
            switch (value){
                case '关键': return 5;
                case '重要': return 4;
                case '中等': return 3;
                case '低级': return 2;
                default: return 1;
            }
        }
    }
];