我在我的Rails应用程序中使用了will_paginate gem并循环遍历在页面上呈现的模型实例数组，每页限制为5个。 在我添加will_paginate之前，我用简单的<％i + = 1％>编号每个项目，当然每个循环通过数组+1，并且工作正常。
但是现在我正在使用will_paginate，计数会在每个页面重新开始，所以第1页的项目分别为1,2,3,4,5，然后在第二页上重启... 1,2,3,4，五
显然这并不理想。 当您转到上一页时，如何让计数继续？
I'm using the will_paginate gem in my Rails app and loop through an array of model instances which are rendered on the page and limited to 5 per page. Before I added will_paginate I numbered each item with a simple <% i += 1 %> which of course went +1 with each loop through the array, and worked fine.
But now that I'm using will_paginate the count restarts on each page, so page 1 items go 1, 2, 3, 4, 5, and then on the second page it starts over... 1, 2, 3, 4, 5
Obviously this isn't ideal. How do I get the count to continue as you go to previous pages?
最满意答案
will_paginate Collection不仅仅是一个简单的Array或ActiveRecord::Relation 。 相反，它定义了一些其他方法 ，例如： current_page ， per_page ， offset ， total_entries或total_pages 。
您可以使用Collection#offset来计算当前索引：
<% @collection.each_with_index do |item, index| %> <%= @collection.offset + index + 1 %> ... <% end %>通过使用第一个索引初始化Enumerator#with_index可以简化什么（注意each和with_index之间的. ：
<% @collection.each.with_index(@collection.offset + 1) do |item, index| %> <%= index %> ... <% end %>A will_paginate Collection is not just a simple Array or ActiveRecord::Relation. Instead it has some additional methods defined, for example: current_page, per_page, offset, total_entries or total_pages.
You can use Collection#offset to calculate your current index:
<% @collection.each_with_index do |item, index| %> <%= @collection.offset + index + 1 %> ... <% end %>What can be simplified by initializing Enumerator#with_index with the first index (note the . between each and with_index:
<% @collection.each.with_index(@collection.offset + 1) do |item, index| %> <%= index %> ... <% end %>更多推荐
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