ruby on rails - How to upload CSV with Paperclip -

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i have looked on other posts creating csv paperclip still bit lost on why isn't working. have method generates csv string (using csv.generate), , try save report in reports controller following method:

  def create(type)     case type     when "geo"       csv_string = report.generate_geo_report     end      @report = report.new(type: type)     @report.csv_file = stringio.new(csv_string)      if @report.save       puts @report.csv_file_file_name     else       @report.errors.full_messages.to_sentence     end   end

however, upon execution, undefined method 'stringify_keys' "geo":string error. here report model:

class report < activerecord::base   attr_accessible :csv_file, :type   has_attached_file :csv_file, paperclip_options.merge(     :default_url => "//s3.amazonaws.com/production-recruittalk/media/avatar-placeholder.gif",     :styles => {       :"259x259" => "259x259^"     },     :convert_options => {       :"259x259" => "-background transparent -auto-orient -gravity center -extent 259x259"     }   )    def self.generate_geo_report     male_count = 0     female_count = 0     csv_string = csv.generate |csv|       csv << ["first name", "last name", "email", "gender", "city", "state", "school", "created at", "updated at"]       athlete.all.sort_by{ |a| a.id }.each |athlete|         first_name = athlete.first_name || ""         last_name = athlete.last_name || ""         email = athlete.email || ""         if !athlete.sports.blank?           if athlete.sports.first.name.split(" ", 2).first.include?("women's")             gender = "female"             female_count += 1           else             gender = "male"             male_count += 1           end         else           gender = ""         end         city = athlete.city_id? ? athlete.city.name : ""         state = athlete.state || ""         school = athlete.school_id? ? athlete.school.name : ""         created_at = "#{athlete.created_at.to_date.to_s[0..10].gsub(" ", "0")} #{athlete.created_at.to_s.strip}"         updated_at = "#{athlete.updated_at.to_date.to_s[0..10].gsub(" ", "0")} #{athlete.updated_at.to_s.strip}"         csv << [first_name, last_name, email, gender, city, state, school, created_at, updated_at]        end        csv << []       csv << []       csv << ["#{male_count}/#{athlete.count} athletes men"]       csv << ["#{female_count}/#{athlete.count} athletes women"]       csv << ["#{athlete.count-male_count-female_count}/#{athlete.count} athletes have not declared gender"]     end      return csv_string   end end

this being called cron job rake task:

require 'csv'  namespace :reports   desc "geo-report"   task :generate_nightly => :environment     report.create("geo")   end end

not sure begin on getting functional. suggestions? i've been reading paperclip's doc i'm bit of newbie it.

thank you!

there's lot going on here :)

first, looks you're getting controller , model confused. in rake task, report model, you're calling create if controller method. models (aka activerecord classes) take key/value pair:

report.create(type: "geo")

another issue you're using "type" name of column, , tell activerecord you're using single table inheritance. means have subclasses of report. unless want sti, should rename column.

finally, shouldn't have controller method takes argument. i'm not sure you're trying there, controller arguments via params hash.


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