如何让f.text_field + “<div>there is a error</div>” 工作

Question

我写一个辅助方法在applicationhelper像这样

str = f.text_field(:username) + "<div class='error'>username is wrong </div>" 

然后在我的view.rhtml它这样表示

<input type="text" value="" size="30" name="user[username]" id="user_username">  &lt;div class="errors"&gt;username is wrong&lt;/div&gt;  

任何帮助？谢谢！

Answer 1

str = f.text_field(:username) + "<div class='error'>username is wrong </div>".html_safe