Question

This is my Taletids table:

Price (integer)
Price2(integer) 

In my view I have:

@taletids = Taletid.where(:online => true).order('position')

But I want to multiply the price column with 2.

And add a “fake” column to the @taletids array sum with is the sum of the Price2 multiplied with 2 (params[:tal]) and the Price column.

So that I can call the sum in view as this:

<% @taletids.each do |tale| %>
  <%= tale.sum %>
<% end %>

Answer 1

You could add a method to your Taletids model representing sum:

class Taletids < ActiveRecord::Base
  def sum
    self.Price + (self.Price2 * 2)
  end

  def sum_x(x)
    self.Price + (self.Price2 * x)
  end
end