gistfile1.rb

module Importers

  class ObjectsImporter
    
    def self.import_objects(row_type)
      ActiveRecord::Base.transaction do
        import = Import.create!(:import_type => row_type.to_s)
        
        row_type.find_in_batches do |rows|
          rows.each do |row|
            object = find_existing_or_initialize_new_object(import, row)
            next unless object
            object.import = import
            if object.new_record?
              before_create_object object
              if object.save
                report_new_save_success object
              else
                report_new_save_failure object
              end
            else
              if object.save
                report_existing_save_success object
              else
                report_existing_save_failure object
              end
            end
            puts
          end
        end
        
      end
    end
    
  private
  
    def self.report_existing_save_failure(object)
      puts "Unable to save existing object #{object.id}"
      puts object.errors.full_messages.to_yaml
      puts object.attributes.to_yaml
    end
    
    def self.report_existing_save_success(object)
      puts "Saved existing object #{object.id}: #{object}"
    end
    
    def self.report_new_save_failure(object)
      puts "Unable to save new object"
      puts object.errors.full_messages.to_yaml
      puts object.attributes.to_yaml
    end

    def self.report_new_save_success(object)
      puts "Saved new object #{object.id}: #{object}"
    end
    
    def self.titleize(string)
      string.blank? ? nil : string.titleize
    end
    
  end

end