Ruby on rails 使数字递增

我有一个静态代码：

  %a#carousel-selector-0.thumbnail
              %img{:src => "http://placehold.it/170x100&text=one"}/
          %li.span2
            %a#carousel-selector-1.thumbnail
              %img{:src => "http://placehold.it/170x100&text=two"}/
          %li.span2
            %a#carousel-selector-2.thumbnail
              %img{:src => "http://placehold.it/170x100&text=three"}/
          %li.span2
            %a#carousel-selector-3.thumbnail
              %img{:src => "http://placehold.it/170x100&text=four"}/
          %li.span2
            %a#carousel-selector-4.thumbnail
              %img{:src => "http://placehold.it/170x100&text=five"}/
          %li.span2
            %a#carousel-selector-5.thumbnail
              %img{:src => "http://placehold.it/170x100&text=six"}/

这是我的每个循环，以使其从数据库动态

- @house.attachments.each do |a|
  = link_to(image_tag(a.file.url), :id => "carousel-selector-{number}", :class => "thumbnail")

如何使{number}递增？比如在静态示例中

试试这个：

- @house.attachments.each_with_index do |a,i|
  = link_to(image_tag(a.file.url), :id => "carousel-selector-#{i}", :class => "thumbnail")

试试这个：

- @house.attachments.each_with_index do |a,i|
  = link_to(image_tag(a.file.url), :id => "carousel-selector-#{i}", :class => "thumbnail")

---

：id=>“旋转木马选择器-{$number+=1}”

假设在循环之前设置了

$number=0

。

：id=>“旋转木马选择器-{$number+=1}”

假设你在循环之前设置了

$number=0

。@BachanSmruty我想他也想要

0

，如果不是的话，你会的right@BachanSmruty我想他也想要

0

如果不是的话，你是对的