_form.html.erb

<%= form_for(@job, :class=>"form-horizontal") do |f| %>
  <% if @job.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@job.errors.count, "error") %> prohibited this job from being saved:</h2>

      <ul>
      <% @job.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="control-group">
    <div class="controls">
    <%= f.text_field :quantity, :class => "input-xlarge", :placeholder => "Quantity" %>
    </div>
   </div>

 <div class="control-group">
   <div class="controls">
  <%= f.select :shirt_quality, ["Standard", "Ring Spun"], :class => "input-xlarge" %>
   </div>
 </div>

 <div class="control-group">
   <div class="controls">
 <%= f.select :turn_around, ["Rush!", "3-5 Days", "5-8 Days", "8-12 Days", "12-16 Days", "I am in no rush man, a month or two works."], :class => "input-xlarge" %>
        </div>
 </div>

   <h5>Attach artwork (optional)</h5>
   <%= f.file_field :art  %>


  <div class="actions">
          <%= f.submit "Get Bids!", :class => "btn btn-success" %>

  </div>
<% end %>

job.rb

class Job < ActiveRecord::Base
  belongs_to :customer
  attr_accessible :quantity, :shirt_quality, :turn_around, :art, :art_file_name
  self.per_page = 10

   has_attached_file :art,
       :storage => :s3,
       :s3_credentials => "#{Rails.root}/config/s3.yml",
       :path => "/:style/:id/:filename"

end
~         

jobs_controller.rb

 def create
    @job = Job.new(params[:job])
    @job.customer_id = current_user.id
    respond_to do |format|
      if @job.save
         format.html { redirect_to current_user, notice: 'Thanks for using shirtloop.com for your t-shirt needs!' }
         format.json { render json: @job, status: :created, location: @job }
      else
        format.html { redirect_to current_user }
       format.json { render json: @job.errors, status: :unprocessable_entity }
      end
              end
  end