Ruby on Rails как найти или передать uploaded file в controller

<%= form_for(:dump, :url=>{:controller=>"reports", :action=>"create"},:html => {:multipart => true})

 <%= f.file_field :uploaded_file %>

def create
 
    @uploaded_file = params[:dump][:uploaded_file].original_filename
 @report_data = Report.import!(@uploaded_file)
end

@uploaded_file = params[:uploaded_file].path

Errno::ENOENT in ReportsController#create
No such file or directory @ rb_sysopen - 
uploaded_files/540e/eab7/5275/7311/f589/0000/original/testcsv1.csv

class Report
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Paperclip
  include Mongoid::Attributes::Dynamic
  
  field :reort_id, type: Integer
  field :report_date, type: DateTime
  field :report_name, type: String
  has_mongoid_attached_file :uploaded_file
  
  do_not_validate_attachment_file_type :uploaded_file
  
  before_uploaded_file_post_process :merge_file
  
 def merge_file
    require 'csv'
 
 input_file = uploaded_file.path 
 
  twocolumn_array = []
  csv = CSV.open(input_file)
  csv.each do |f|
  twocolumn_array << f.values_at(0,1)
  end