gistfile1.rb

PinController

def fees
    @title = "Pay Fees"
     if request.post?
    pin = Pin.check_pin_value(params[:pin][:number])
    if pin.nil?
      flash.now[:error] = "Unable to Pay Fees,Check You Pin and Make sure it has not been Used"
    else
      # pin_value = pin.pin_value
       pin.update_attribute(:status,0)
      flash.now[:success] ="Fees Paid"
    end
  end
    end



pins/fees.html.erb
.....
Please Enter Your Pin :
  <%= f.text_field :number %>
  <%= f.submit "Pay Fees" , :class => "new" %>
....

Pin's Migration 
......
t.integer   :number
      t.integer   :value
      t.boolean   :status,:default => true...


class Pin < ActiveRecord::Base
   attr_accessible :number ,:value,:pin_quantity,:serial_no,:user_id
  attr_accessor  :pin_quantity
   before_save :create_pin

   belongs_to :user



   pin_value_regex = /^(12500|28500)$/
   pin_quantity_regex =   /^(12500|28500)$/



  validates :pin_quantity, :presence => true,
                          :length => {:minimum => 2},
                            :numericality => true
  validates :value , :presence=> true,
                         :format => {:with => pin_value_regex,
                        :message => "is not a valid value"}




   def self.search(search, page) # this basically adds a search feature to Our  page
  paginate :per_page =>36, :page => page,
      :conditions=> ['number like ? ' , "%#{search}%"],
      :order => 'status ASC'
   end
  # '[[:<:]]#{search}[[:>:]]'
  def create_pin
    self.number = Time.now + rand(10_000_000-1_000_000)+1_000_000
  end

   class << self
   def check_pin(pin_to_check)  #Check the validity of a Pin, if it's been used or not, Remove self whe
                                        #ready to fly
       pin = find_by_number(pin_to_check)
       if pin.nil? and pin.pin_status?
         nil
       else
         pin
        end
   end

    def check_pin_value(pin_to_check) #Checks and returns the value of a pin
    pin = find_by_number(pin_to_check)
      if pin.nil?
        nil
      else
        return pin
         #pin =Pin.select(:pin_value).where(:number => pin_to_check)
      end
    end
   end

  # Pin Encryption Methods
 private
    def encrypt_pin
      self.salt = make_salt if new_record?
      self.encrypted_pin = encrypt(pin)
    end

    def encrypt(string)
      secure_hash("#{salt}--#{string}")
    end

    def make_salt
      secure_hash("#{Time.now.utc}--#{pin}")
    end

    def secure_hash(string)
      Digest::SHA2.hexdigest(string)
    end
  end
Each time the Form is submitted, the boolean attibute of status changes, but same with the value attribute