Finally, create an action for each controller called invalid and use the method to inform the user that their form submission was invalid.
最后,为每个控制器创建一个称为invalid的操作,并使用这个方法通知用户提交的表单无效。
To read the article data, the ArticleHome interface must be retrieved and its findByPrimaryKey() method must be called for each article in the shopping cart.
要读取该商品数据,必需 ArticleHome 接口,并且为购物车中的每个商品调用该接口的 findByPrimaryKey() 方法。
And finally, create_user_tree is called to create a mount tree for each user.
最后,调用create_user _ tree为每个用户创建挂载树。
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