Rails: Get next / previous record

Question

My app has Photos that belong to Users.

In a photo#show view I\'d like to show \"More from this user\", and show a next and previous photo from that user. I would be

Answer 1

Modify your app/models/application_record.rb to the following code:

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true

  def next
    self.class.where("id > ?", id).order("id ASC").first || self.class.first
  end

  def previous
   self.class.where("id < ?", id).order("id DESC").first || self.class.last
  end
end

Then you can use next() and previous() in all your models.