Rails - Jun 2007 - problem with multiple file attachment

hi,

  actually i have done single file attachment in ruby on rails, now i
want to do multiple attachment, but the problem is when i am trying to
display the second file name from the params for the testing purpose, i
got the error, please can anyone correct the error.

in view:

<tr>
  <td bgcolor="#F6F6F6"><%= file_field("picture",
"file") %></td>
  </tr>
  <tr>
  <td bgcolor="#F6F6F6"><%= file_field("test",
"file") %></td>
  </tr>
  <tr>

in controller:

  if request.post?
  @picture=params[:picture][:file]
  @filename = @picture.original_filename
  @test=params[:test][:file]
  render_text @filename1 = @picture1.original_filename
  end

my Error is:

undefined method `original_filename'' for "":String

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sorry this is my controller

if request.post?
  @picture=params[:picture][:file]
  @filename = @picture.original_filename
  @test=params[:test][:file]
  render_text @filename1 = @test.original_filename
  end

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