使用 @action 装饰器.在下面的简单示例中，下拉菜单中显示的是重新计算费用"文本.

Use the @action decorator. Simple example below, the text "Recalculate Charges" is what appears in the drop-down menu.

class TransactionView(AdminView):

@action('recalculate', 'Recalculate Charges', 'Are you sure you want to recalculate selected transactions(s)?')
def action_recalculate(self, ids):
    count = 0
    for _id in ids:
        transaction_service.recalculate_transaction(_id)
        count += 1
    flash("{0} transaction (s) charges recalculated".format(count))