class UpdateCourseName < ActiveRecord::Migration
  def up
    count = Course.all.count / 30 + 2
    transaction do
      for i in 1 ... count do i
          Course.page(i).per(30).each do |course|
            if course.syllabus && !course.syllabus.title.nil?
              if course.name.index(course.syllabus.title) != 0
                course.update_column("name", course.syllabus.title+course.name)
              end
            end
          end
      end
    end
  end

  def down
  end
end