Flask Admin使用自定义按钮扩展“带有选择"下拉菜单
问题描述：
我使用flask admin的内置视图.如您在下面的图片中看到的:
Im using the built-in view of flask admin. As you can see in the picture below:
我想尝试的方法很简单:我只想使用自定义按钮扩展下拉菜单.此按钮应对所有选定项目执行一些操作.烧瓶是否有内置功能，我可以在其中简单地添加一个动作按钮?
What Im trying is simple: I just want to extend the dropdown menu with a custom button. This button should perfome some action on all selected items. Is there are built-in function of flask where i can simple add an action button?
答
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))