Question

我一直在Google和StackOverflow上进行搜索。基本上，我想尝试覆盖Flask-Admin上的删除功能，以实际上不删除记录，而是更新对象的行“ deleted_by”和“ deleted_on”。

我在StackOverflow上发现了几个问题，这些问题解释了如何通过使用on_model_change来更改保存按钮上的逻辑，但是没有一个关于删除模型逻辑的具体问题。我也没有在文档中找到与此有关的任何信息。谁能告诉我该如何处理这个问题？

谢谢！

Answer 1

您视图中的覆盖方法delete_model。如果您使用的是Sqlalchemy视图，则为default behaviour，请注意在self.session.delete(model)块中对try ... except的调用。

def delete_model(self, model):
    """
        Delete model.
        :param model:
            Model to delete
    """
    try:
        self.on_model_delete(model)
        self.session.flush()
        self.session.delete(model)
        self.session.commit()
    except Exception as ex:
        if not self.handle_view_exception(ex):
            flash(gettext('Failed to delete record. %(error)s', error=str(ex)), 'error')
            log.exception('Failed to delete record.')

        self.session.rollback()

        return False
    else:
        self.after_model_delete(model)

    return True

您需要在视图中添加以下内容：

class MyModelView(ModelView):


   def delete_model(self, model):
        """
            Delete model.
            :param model:
                Model to delete
        """
        try:
            self.on_model_delete(model)
            # Add your custom logic here and don't forget to commit any changes e.g. 
            # self.session.commit()
        except Exception as ex:
            if not self.handle_view_exception(ex):
                flash(gettext('Failed to delete record. %(error)s', error=str(ex)), 'error')
                log.exception('Failed to delete record.')

            self.session.rollback()

            return False
        else:
            self.after_model_delete(model)

        return True

此外，您可能不想打扰self.on_model_delete(model)和self.after_model_delete(model)调用，因为默认情况下它们什么都不做。

如何在Flask Admin上覆盖删除逻辑？

1 个答案: