Question

I want to pull 5 records at a time into the view (I’m using rails 2.3.8).

I am using will_paginate, and it’s working great but:

I want to send those results to the view, 5 records at a time, then add a div, then loop through until they’re all shown.

I tried using find_in_batches, but I don’t know how to access the objects it’s returning. Can I use #{}?

I know there’s .first and .last methods but is there any such thing as .second, .third, .fourth, etc?

Answer 1

You have an example for find_in_batches in the documentation:

Person.find_in_batches(:conditions => "age > 21", :batch_size => 5) do |group|
  sleep(50) # Make sure it doesn't get too crowded in there!
  group.each { |person| person.party_all_night! }
end

This may not be the solution you’re looking for, though. If you have 5000 records, this will issue 1000 database queries.

A better solution would be using each_slice, this method will fetch all records in one database query and split the result set afterwards:

Person.find(:all, :conditions => "age > 21").each_slice(5) do |group|
  group.each { |person| person.party_all_night! }
end