我会针对链接执行此操作

I would do this for the links

<%= ([1,2,3]- [params[:x]]).each do |link_number| %>
   <%= link_to "Version #{link_number}", "/page?x=#{link_number}" %>
<% end %>

这样，每次加载页面时，都会存在指向其他2个版本的链接。

This way everytime the page is loaded the link to the other 2 versions will exist.

您可以通过控制器处理部分零件（似乎更好），也可以使用类似的东西：

You could handle the partials through the controller (which seems better) or use something like:

<%= render "version_#{['A','B','C'][params[:x] - 1]}" %>

在没有更好地理解问题的情况下，我无能为力。

Without a better understanding of the problem I cannot assist beyond this point.