Rails - Upload and parse multiple CSV files - ruby-on-rails

Question

Im trying to upload and parse multiple CSV files. What I have so far:
My View
<h3>Upload multiple files</h3>
<%= form_tag({:controller => "multi_uploader", :action => "import"}, :multipart => true) do %>
<em>Upload a tab-separated .txt file to generate new rating sets.</em> <hr/>
<%= file_field_tag :file_1 %>
<hr/>
<%= file_field_tag :file_2 %>
<hr/>
<%= file_field_tag :file_3 %>
<hr/>
<%= file_field_tag :file_4 %>
<hr/>
<%= file_field_tag :file_5 %>
<hr/>
<%= file_field_tag :file_6 %>
<hr/>
<%= submit_tag "Import Data", :class => "btn btn-link"%>
<% end %>
My Controller:
def import
unless params[:file_1].nil?
file_1 = params[:file_1]
RatingSet.multi_uploader(file_1)
end
unless params[:file_2].nil?
file_2 = params[:file_2]
RatingSet.multi_uploader(file_2)
end
unless params[:file_3].nil?
file_3 = params[:file_3]
RatingSet.multi_uploader(file_3)
end
unless params[:file_4].nil?
file_4 = params[:file_4]
RatingSet.multi_uploader(file_4)
end
unless params[:file_5].nil?
file_5 = params[:file_5]
RatingSet.multi_uploader(file_5)
end
unless params[:file_6].nil?
file_6 = params[:file_6]
RatingSet.multi_uploader(file_6)
end
redirect_to "/multi_uploader", :flash => { :notice => "Successfully Uploaded." }
end
My Model method to import file:
def self.multi_uploader(file)
upload = File.open(file.path)
#Parse file and save data to db.
end
In my multi_uploader method, I parse out a key (from the file) for which category the file is supposed to be uploaded to. Everything works as expected when I upload a single file, however if I upload multiple files, the contents of all files are being saved for to a single category, rather than multiple categories. Its as if all files are being treated as a single file, rather than n individual files. What can I change to upload each file individually?

Answer 1

Well, as far as I see. This behavior shouldn't actually be happening. I would suggest another way of doing this code, since it's looking a bit polluted.
def import
(1..x).each do |i| #with x being the max number of files uploaded at the same time
RatingSet.multi_uploader(params["file_#{i}".to_sym])
end
redirect_to "/multi_uploader", :flash => { :notice => "Successfully Uploaded." }
end
Either way, this shouldn't solve your problem. I can't tell why this is happening to be honest.
UPDATE:
Have you considered using: <%= f.file_field :file, :multiple => true %> instead of mutiple file_tags?