Fetch all entries exept those with empty column in Rails
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            by Alfred Nerstu
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        Published on 2010-03-11T18:43:54Z
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            2010/03/11
            19:24 UTC
        
        
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How do I fetch all 'link' entries exept those with an 'url' column that is blank? My controller looks like this:
  def show
    @user = User.find_by_username(params[:username])
    @links = @user.links.all
    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @links }
    end
  end
Thanks in advance!
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