parsing CSV file with delayed job issue - ruby-on-rails

Question

I have a CSV file to parse with two ways:
Upload the file and parse it in real time
Upload the file and parse it with a delayed_job
When I parse the file in real time, there is no problem, but when I parse the file with a delayed job, I get a CSV::Table but with nil fields [nil,nil.....]
This is how I parse the file in the helper:
CSV.parse(file.read, :headers => true, :row_sep =>:auto)
This is how I save the csv file and I create the delayed job:
yeah its CSV, I made a typo, but I still have the problem, I read the file in an action like this:
def create
if params[:dump]
file = File.new(params[:dump][:file].original_filename, "w")
File.open(file.path, "w") { |f| f.write(params[:dump][:file].read.force_encoding('UTF-8')) }
#import = Import.create(:created_by => current_user.id, :import_file_path => file.path, :size => 0)
file.close
file_to_parse = File.open(#import.import_file_path)
if params[:dump][:file].size < 10000
parsed_file = parsed file_to_parse
if parsed_file && parsed_file.count > 0
#imported_contacts, #imported_organizations = extract_contacts_and_organizations_from parsed_file
validate_and_save #imported_organizations if #imported_organizations.any?
validate_and_save #imported_contacts if #imported_contacts.any?
#import.update_attributes(:done => true, :size => (#imported_contacts.size + #imported_organizations.size))
redirect_to org_import_path(current_org, #import)
else
redirect_to new_org_import_path(current_org) , :notice => "fichier vide ou introuvable ou ne pas de format cvs/vcf"
end
else
Delayed::Job.enqueue(ImportJob.new(current_org, current_user, #import.id))
redirect_to org_import_path(current_org, #import)
end
else
redirect_to new_org_import_path(current_org) , :notice => "vous devrez selctionner un fichier"
end
end

Answer 1

In your code, #import object has the :import_file_path variable that points to a tempfile (file.path) uploaded by a user.
Since this tempfile will be automatically removed as soon as the action finishes, the delayed job can't find the file when it attempts to run the job in the background (the action is already finished).
What about to copy a tempfile to some place and use it instead?
In this case, you need to add a line of code that deletes the copied file at the end of the delayed job process.
I hope this works for your problem.