Validations for Importing CSV data into MySql database in Rails 3.1?

Hi, i implemented the task of importing data from csv into MySQL database successfully. Now, my requirement is: i need to get error message with line number, if there is any mis match of data in csv file while importing.

This is my controller code:

require 'csv' #at the top and followed by... def load_csv # no code end

def import_csv parsed_file = CSV.foreach(params[:csv].tempfile,:headers => true) do

row>

row = row.to_hash.with_indifferent_access Institute.create!(row.to_hash.symbolize_keys) redirect_to :action => :index end

In my view/ load_csv.html.erb:

<%= form_for(:institute, :url => import_csv_institutes_path, :html => {:multipart => true}) do |f| %> <div class="field"> <%= file_field_tag :csv %> <%= f.submit 'Import' %> </div> <% end %>

In config/route.rb:   resources :institutes do     get 'load_csv', :on => :collection     post 'import_csv', :on => :collection   end

I tried for flash message before redirect_to :action => :index in import_csv, but its of no use.. TH eflash is not working. The above are the only three steps i used for importing. Model validations are working only for form and for csv, an error page displayed.. Please try to help me out.........................