Rails 每个循环插入标签每 6 个项目? [英] Rails each loop insert tag every 6 items?

问题描述

我需要在视图中循环遍历 X 个图像对象，并且希望每 6 个对象左右创建一个新 div(对于画廊).

我看过循环，但它似乎改变了所有其他记录.有人知道每 6 次将代码插入视图的方法吗?

我可能可以用嵌套循环来做到这一点，但我对这个有点难.

解决方案

您可以将 Enumerable#each_slice 与 #each 结合使用以避免内联计算.each_slice 将数组分成 n 个块，在本例中为 6.

<% @images.each_slice(6) 做 |slice|-%><div class="gallery"><% slice.each do |image|-%><%= image_tag(image.url, :alt => image.alt) %><%结束-%>

<%结束-%>

I have X number of image objects that I need to loop through in a view and want to create a new div every 6 objects or so (for a gallery).

I have looked at cycle but it seems to change every other record. Does anyone know of a way to insert code into a view every 6 times?

I could probably do it with nested loops but I am kinda stumped on this one.

解决方案

You can use Enumerable#each_slice in conjunction with #each to avoid inline calculations. each_slice breaks the array into chunks of n, in this case 6.

<% @images.each_slice(6) do |slice| -%>
  <div class="gallery">
    <% slice.each do |image| -%>
      <%= image_tag(image.url, :alt => image.alt) %>
    <% end -%>
  </div>
<% end -%>

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