Rails - Mar 2011 - Token Poken :( I'm stuck with this

Hay all!
I have question-answer base.. like quiz, yeah? yes!
So i need to do this way... my project without registration so this way
i need token..
user can answer on my question only once.. How can i do this? Iand i can
give him link, and link should be like : localhost:3000/token .. he gets
on this link, answer and click go and that''s all. If he want to get on
this page once again he will get message something like "Sorry bro you
already passed quiz".

#answer_controller.rb
class AnsweController < ApplicationController

  layout "default"

  $all_questions_archive = Question.count(''id'')
  $all_questions_active
Question.find(:all,:conditions=>"enabled=1").count



  def create

  @w1 = rand(9999999)
  @w = Digest::SHA1.hexdigest(@w1.to_s)


        @answers=Hash.new
  questions = Question.find(:all,:conditions=>"enabled=1")
  questions.each do |question|
            if params["answer_"+question.id.to_s]
     @answers[question.id]=params["answer_"+question.id.to_s]
         if
!Answer.create(:question_id=>question.id,:token=>@w,:text=>params["answer_"+question.id.to_s])
      flash[:error]="Can`t create answer!"
     end
            end
  end
  if !flash[:error]
          redirect_to :action=>"pass"
           return false
  end



  end

  def index

     @answers=Hash.new
     @questions = Question.find(:all,:conditions=>"enabled=1")

  end


  def pass
  flash[:notice]="<span id=''ty''>Thank you for your
answers!</span>"
        render :text=>"", :layout=>"ty"
  end


#view => index.html.erb

<% form_tag :action=>"create" do %>
<table border="0" width="900px" align="center"
style="background:#e1e3e3;
padding-top:10px;padding-left:20px;padding-right:20px;padding-bottom:20px;">
  <% @questions.each_with_index do |question, index| %>
  <tr style="vertical-align:middle; text-align:left;">
    <td width="400px" colspan="2"
style="padding-top:10px;">

 <span style="font-size:15px"><%= index+1 %>. <%=
question.text
%></span><br>
    <%= text_area_tag
"answer_#{question.id}",@answers[question.id],
:cols=>"90", :rows=>"4", :class =>
''inputBox'' %>
    </td>
  </tr>
  <% end %>
</table>
<table border="0" width="900px" align="center"
class="table2">
  <tr>
    <td align="right"><%= submit_tag ''Pass survey
&rarr;'', :class =>
''submit''%></td>
  </tr>
  <tr>
    <%=h @w %>
  </tr>
</table>
<% end %>


What did i do wrong? Please help m,e!

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