Cookie Overflow at CSV import


I have a form for importing a csv file. With every entry in my CSV I
do a delayed background call from a webservice and the result is then
saved to my database. This is working great!

Now I tried a CSV file with over 400 rows. After clicking import in my
form it takes some time and then I get the following error message:
'ActionDispatch::Cookies::CookieOverflow'. But nevertheless 300 of the
400 jobs are already created in my delayed_jobs table.

The code below is copied from other threads, so I don't really know
where I save something in cookies. I guess it is at 'file.tempfile' in
the controller, but I am not sure.

How can I avoid that error? I found something about using
session_store instead of cookie_store, but I don't know how to do

I have the following in my controller:

    file = params[:file], {:headers => false, :col_sep => ";"}).each
do |row|
        @list << row[1]

and this in my view:

<%=form_tag '/importcsv/csv_import', :multipart => true do%>
  <%= file_field_tag "file" %><br/>
  <%= submit_tag("Import") %>
<% end %>



In order to use session store you have to do the following things,

To create a migration file:
rake db:sessions:create

To create session table:
* For development mode: rake db:migrate
* For production mode: rake db:migrate RAILS_ENV=production

Then un-comment the following line in config/environment.rb
config.action_controller.session_store = :active_record_store

restart the app.. thats it..

Saravanan K


I am on rails 3. I don't know if it is because of that, but I had to
un-comment the line in 'config/initializers/session_store.rb' instead
of 'config/environment.rb'. And the line you send me is deprecated (my
server told me), so I used this instead:
Savon::Application.config.session_store :active_record_store

Thank you so much it worked like a charm!