xiexiao

{
            xtype: 'datefield',
            onTriggerClick: function () {
                var dt1 = this;
                Ext.form.DateField.prototype.onTriggerClick.apply(dt1, arguments);
                if (Ext.isEmpty(dt1.clearBtn)) {
                    this.clearBtn = new Ext.Button({
                        text: 'Clear',
                        handler: function () {
                            dt1.setValue("");

xiexiao

def dbhook():
    '''数据库的hook'''
    def _(func):
        '''_'''
        def wrapper(*a, **kw):
            '''wrapper'''
            _handler = a[0]
            db = "DB/ershou.db"
            _handler.conn = sqlite3.connect(db,check_same_thread = False)
            _handler.conn.execute('pragma foreign_keys = on')