Easily generate a csv file.

generate_csv.rb

# This is the easiest way to generate a csv and have it downloaded by the user.
# Drop this in a method in the controller and call it on click.

require 'csv'

file = CSV.generate do |csv|
  csv << ["Name", "Email"] # headers
  Contact.all.each do |person|
    csv << [person.name, person.email]
  end
end


send_data file, :type => 'text/csv; charset=iso-8859-1; header=present', :disposition => "attachment;filename=filename.csv"