Migrating from Paperclip to ActiveStorage

organization.rb

class Organization < ApplicationRecord
  has_one_attached :logo
   
  # Old Paperclip config
  # must be removed BEFORE to running the rake task
  has_attached_file :logo,
                    path: "/companies/:id/:basename_:style.:extension",
                    default_url: "https://xxxxx.cloudfront.net/companies/missing_:style.jpg",
                    default_style: :normal,
                    styles: { thumb: "64x64#", normal: "400x400>" },
                    convert_options: { thumb: "-quality 100 -strip", normal: "-quality 75 -strip" }
end

organizations.rake

namespace :organizations do
  task migrate_to_active_storage: :environment do
    Organization.where.not(logo_file_name: nil).find_each do |organization|
      image = organization.logo_file_name
      ext = File.extname(image)
      image_original = URI.unescape(image.gsub(ext, "_original#{ext}"))

      logo_url = "https://s3.amazonaws.com/xxxxx/companies/#{organization.id}/#{image_original}"
      organization.logo.attach(io: open(logo_url),
                                   filename: organization.logo_file_name,
                                   content_type: organization.logo_content_type)
    end
  end
end

user.rb

class User < ApplicationRecord
  has_one_attached :avatar
  
  # Old Paperclip config
  # can be removed AFTER you run the rake task
  has_attached_file :headshot,
                    path: "/users/:id/:basename_:style.:extension",
                    default_url: "https://xxxxx.cloudfront.net/users/missing_:style.jpg",
                    default_style: :normal,
                    styles: { thumb: "64x64#", normal: "400x400>" },
                    convert_options: { thumb: "-quality 100 -strip", normal: "-quality 75 -strip" }
end

users.rake

namespace :users do
  task migrate_to_active_storage: :environment do
    User.where.not(headshot_file_name: nil).find_each do |user|
      user.avatar.attach(io: open(user.headshot.url(:original, timestamp: false)),
                         filename: user.headshot_file_name,
                         content_type: user.headshot_content_type)
    end
  end
end