Require CSV Issue - ruby-on-rails-3

Question

I'm running a RAils 3.1,ruby 1.9.2 app and I've a issue with CSV;I must import data from csv file; this is my code:
def bulk_operations
require 'csv'
last_asset = ""
last_serial = ""
if request.path.include? "ingress_transport_document"
transport_document_id = params[:ingress_transport_document_id]
td = IngressTransportDocument.find(transport_document_id)
ingress = true;
elsif request.path.include? "egress_transport_document"
transport_document_id = params[:egress_transport_document_id]
td = EgressTransportDocument.find(transport_document_id)
end
if params[:dump_me]
begin
# #parsed_file=CSV::Reader.parse(params[:dump_me][:file],';',"\n")
CSV.foreach(params[:dump_me][:file]) do |row|
bw=BulkWarehouse.new
bw.serial = row[0]
bw.asset = row[1]
logger.debug "#{bw.serial},#{bw.asset} --> #{bw.serial.strip}"
#
# Cerco la presenza di warehouse se la bolla e di tipo aggiornamento
#
if !bw.serial.strip.empty? && !bw.asset.strip.empty? && update_warehouse
warehouse = Warehouse.find_by_serial_and_asset(bw.serial.strip,bw.asset.strip)
elsif !bw.serial.strip.empty? && update_warehouse
warehouse = Warehouse.find_by_serial(bw.serial.strip)
elsif !bw.asset.strip.empty? && update_warehouse
warehouse = Warehouse.find_by_asset(bw.asset.strip)
end
if warehouse && update_warehouse
bw.warehouse_id = warehouse.id
elsif update_warehouse
#wh_errors[:"bulk_warehouse#{n}"] = "Prodotto non presente"
end
if request.path.include? "ingress_transport_document"
bw.ingress_transport_document_id = transport_document_id
elsif request.path.include? "egress_transport_document"
bw.egress_transport_document_id = transport_document_id
end
if bw.save
n=n+1
GC.start if n%50==0
end
last_serial = row[0]
last_asset = row[1]
end
count = sa_query
flash[:notice]="Il CSV e stato importato con successo: #{n} nuovi record sono stati accodati per essere processati.<br>In totale hai #{count} record in attesa di essere processati."
#rescue CSV::IllegalFormatError
logger.debug("CSV Exception: IllegalFormatError")
count = sa_query
flash[:notice] = "Il CSV NON sembra essere formattato correttamente."
flash[:notice] += "L'ultimo ASSET inserito e stato #{last_asset}." if !last_asset.empty?
flash[:notice] += "L'ultimo SERIALE inserito e stato #{last_serial}." if !last_serial.empty?
flash[:notice] += "#{n} nuovi record sono stati accodati per essere processati."
flash[:notice] += "In totale hai #{count} record in attesa di essere processati."
end
end
# update_warehouse e true solo se la bolla e di tipo da aggiornamento
update_warehouse = td.transport_document_type.code == "AGE" ||
td.transport_document_type.code == "REP" ||
td.transport_document_type.code == "ASS"
if params[:ingress_transport_document_id] || params[:egress_transport_document_id]
self.index
render :index
else
redirect_to :action => "index"
end
and Rails give me the following errors: can't convert ActionDispatch::Http::UploadedFile into String
Any suggestion

Answer 1

In Ruby 1.9 it's just CSV.parse. See: http://www.ruby-doc.org/stdlib-1.9.3/libdoc/csv/rdoc/CSV.html#method-c-parse