error_messages_for

最新推荐文章于 2025-06-07 19:24:53 发布

原创最新推荐文章于 2025-06-07 19:24:53 发布 · 747 阅读

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本文解答了一个关于Ruby on Rails应用中如何正确使用error_messages_for显示表单验证错误的问题。作者解释了error_messages_for的工作原理，并给出了实例说明如何针对不同变量名的对象正确调用此方法。

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在http://www.ruby-forum.com/topic/114652#new论坛中看到如下问题：

   I have a database table called "hvd_codes", the model is called HvdCode.
In my form partial, what should I enter as a parameter to
error_messages_for? I've tried <%= error_messages_for 'hvd_codes' %> but nothing is
displayed.
   IRC error_messages_for simply looks for a global variable named after
its parameter and parse the result 'errors' called on it.
So if you have a @hvdcode which is a HvdCode instance, just use
'hvdcode'. If you had a @foo instance of HvdCode, you'd use  'foo'...