Parameters: {"utf8"=>"✓", "authenticity_token"=>"s0SqCQwVBFYYZudSRZ30/2fw4U1iiNPHqKe/8WI7lhI=", "doc"=>{"title"=>"asdasdd", "a"=>#<ActionDispatch::Http::UploadedFile:0x007fc313302e28 @tempfile=#<Tempfile:/var/folders/kq/j_tktbwx2m71cw2s6hm09rpw0000gn/T/RackMultipart20141124-23307-96wq57>, @original_filename="Untitled 2.numbers", @content_type="application/octet-stream", @headers="Content-Disposition: form-data; name=\"doc[a]\"; filename=\"Untitled 2.numbers\"\r\nContent-Type: application/octet-stream\r\n">}, "commit"=>"Create"}



---------


form

<%= form_for @doc, :html => {:multipart => true} do |f| %>
    <p><%= f.text_field :title %></p>
  	<p><%= f.file_field :data_file %></p>

	<%= f.submit "Create" %>

<% end %>



------

class Doc < ActiveRecord::Base
  belongs_to :course
  mount_uploader :data_file, DocFileUploader
end


-------
  create_table "docs", force: true do |t|
    t.string   "title"
    t.string   "path"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.string   "data_file"
  end