this is my first ruby script..for rake tasks.. used to populate the database with the students textbook info

textbooks.rake

namespace :sp do

    authors = %w/Magesh Bala Vikram Abraham Imran Satish Harish Varun Jayamohan Ramesh Raghuvamsan Yogesh Yuvaraja Ranjith Kavitha Safia Surya Priya Shalini Priyanka/

    publishers = ["Tamil Nadu TextBook Corporation"]
    al = authors.length
    pl = publishers.length

    task :textbooks => :environment do
        TextBook.delete_all
        Lesson.delete_all
        PrescribedText.delete_all


        courses = Course.find :all, :conditions => ["grade_level = 12"]
        puts "Wait..Creating Text Books now.."
        courses.each do |course|


            if(course.name =="I" && course.parent.name == "English")
                tb = TextBook.new(:title => "English Reader", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject =>"#{course.parent.name} #{course.name}", :grade_level => 12)
                tb.save!

             else if(course.name =="II" && course.parent.name == "English")
                tb = TextBook.new(:title => "Communicative English", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject => "#{course.parent.name} #{course.name}", :grade_level => 12)
                tb.save!
                  end
            end

            if(course.name =="I" && course.parent.name == "Mathematics")
                tb = TextBook.new(:title => "Mathematics-1", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject => "#{course.parent.name} #{course.name}", :grade_level => course.grade_level)
                tb.save!

                else if(course.name =="II" && course.parent.name =="Mathematics")
                tb = TextBook.new(:title => "Mathematics-2", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject => course.name, :grade_level => course.grade_level)
                tb.save!
                     end
            end

            if(course.name == "Physics")
                tb = TextBook.new(:title => "Physics-Volume 1 & 2", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject => course.name, :grade_level => course.grade_level)
                tb.save!
            end

            if(course.name == "Chemistry")
                tb = TextBook.new(:title => "Chemistry-Volume 1 & 2", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject => course.name, :grade_level => course.grade_level)
                tb.save!

            end

            if(course.name == "Accountancy")
                tb = TextBook.new(:title => "Accountancy-Volume 1 & 2", :authors => authors[rand(al)], :publisher => publishers[rand(pl)], :subject => course.name, :grade_level => course.grade_level)
                tb.save!

            end
        end

        textbooks = TextBook.all
        count = textbooks.size

        puts "Created #{count} Textbooks.."
        textbooks.each do |t|
            10.times do |l|
                lesson = Lesson.new(:title => "Chapter #{l+1}",:text_book_id => t.id, :sord => l, :time_slots => 10 + rand(20))
                lesson.save!
                puts "Chapter #{l+1} for Textbook #{t.title} added"
            end
        end

        #textbooks = TextBook.all
        schoolyr = SchoolYear.all
        schoolyr.each do |syr|
            courses.each do |course|
               # if(course.name == 'English' || course.name == 'Accountancy' || course.name == 'Chemistry' || course.name == 'Computer Science' || course.name == 'Mathematics' || course.name == 'Physics')

                if(course.parent_id != nil)

                    #2.times do |t|
                        ptext = PrescribedText.new
                        ptext.school_year = syr
                        ptext.course = course
                        textbooks.each do |textbook|
                            if(textbook.subject == "#{course.parent.name} #{course.name}")
                                ptext.text_book = textbook
                                puts " Creating Prescribed TextBooks for #{syr.academic_year}"
                            else

                            end
                        ptext.save!
                    end
                else
                    #1.times do |t|


                    ptext = PrescribedText.new
                    ptext.school_year = syr
                    ptext.course = course
                    textbooks.each do |textbook|
                        if(textbook.subject == course.name)
                            ptext.text_book = textbook
                        else


                        end
                        ptext.save!
                    end
                end
            end
        end
    end
end