为什么带有额外参数的 button_tag 会出错？

Question

我有一个表单和一个按钮：

= button_tag( "×" , type: "button", html: {class: "close", aria-hidden: "true"},  data: {dismiss: "alert"} )

它从 twitter 引导程序 [http://getbootstrap.com/components/#alerts] 转换为 rails：

<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>

但是 rails 变体出现错误：

SyntaxError in Search#get_search
Showing /.../app/views/search/new.html.slim where line #58 raised:

/.../app/views/search/new.html.slim:58: syntax error, unexpected tLABEL
...: {class: "close", aria-hidden: true},  data: {dismiss: "ale...
...                               ^
/.../app/views/search/new.html.slim:58: syntax error, unexpected ')', expecting keyword_end
... {dismiss: "alert"} )))).to_s)); 
...                               ^

aria-hidden: "true" 或 dismiss: "alert" 有问题

为什么会这样？我使用了不同的变体，它们抱怨 [http://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#method-i-button_tag]：

button_tag(content_or_options = nil, options = nil, &block)

Answer 1

这种语法是不允许的：

aria-hidden: "true"

替换为：

:"aria-hidden" => "true"

或

"aria-hidden" => "true"

或

aria: { hidden: true }