CODEWITHSUNDEEP
ruby-on-railsruby
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Reputation: 2278

Ruby on Rails Splitting or Slicing list into columns

@locations = Location.all #current listing all

@locations = Location.slice(5) or Location.split(5)

With Ruby I'm trying to split my list into 4 columns, limiting each column to 5 each; however neither slicing or splitting seems to work. Any idea of what I might be doing wrong? any help is greatly appreciated.

Upvotes: 5

Views: 2041

Answers (2)

Shawn Balestracci
Shawn Balestracci

Reputation: 7530

You probably want to use in_groups_of:

http://railscasts.com/episodes/28-in-groups-of

Here's Ryan Bates' example usage from that railscast: 

<table>
<% @tasks.in_groups_of(4, false) do |row_tasks| %>
  <tr>
    <% for task in row_tasks %>
      <td><%= task.name %></td>
    <% end %>
  </tr>
<% end %>
</table>

Upvotes: 11

Lu&#237;s Ramalho
Lu&#237;s Ramalho

Reputation: 10208

Would something like the following suit your purposes?

Location.find_in_batches(batch_size: 5) do |group|
  # code to work with these 5 elements
end

find_in_batches yields each batch of records that was found by the find options as an array.

Upvotes: 2

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