Rails - Nov 2005 - errors not showing

Hello,

I''m facing a strange problem :
1/ I have a model that do not validate
2/ I add an error (errors.add)
3/ I try to display the error (error_messages_for), but it does not  
display

error_messages_for returns nil, and I''ve checked that my model do not  
validate (with the logger).

So what am I doing wrong?
Your help will be much appreciated!

You''ll find my code below.

Thanks,
Thomas Balthazar.


  --- my MODEL :
class Picture < ActiveRecord::Base
   validate :check_size

   def check_size
     errors.add(:picture,''Taille = 0'') if @temp_file.size == 0
     logger.error(''check_size'')
   end
end

  --- my CONTROLLER :
class PicturesController < ApplicationController
   def new
     logger.error("--new--")
     @categories = Category.find(:all,:include =>
''keywords'')
     @picture = Picture.new
   end

   def create
     @picture = Picture.new(@params[:picture])
     if @picture.save
       flash[:notice] = "La photo a bien été créée."
       redirect_to :controller => ''search''
     else
       logger.error("i wont save")
       redirect_to :action => ''new''
     end
   end
end

  --- my VIEW with :
<%= error_messages_for(:picture) %>