config/initializers/paperclip.rb


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if ENV['S3_ENABLED'] == 'true'
  Aws.eager_autoload!(services: %w(S3))

  Paperclip::Attachment.default_options[:storage]        = :s3
  Paperclip::Attachment.default_options[:s3_protocol]    = 'https'
  Paperclip::Attachment.default_options[:url]            = ':s3_domain_url'
  Paperclip::Attachment.default_options[:s3_host_name]   = "s3-#{ENV.fetch('S3_REGION')}.amazonaws.com"
  Paperclip::Attachment.default_options[:path]           = '/:class/:attachment/:id_partition/:style/:filename'
  Paperclip::Attachment.default_options[:s3_headers]     = { 'Cache-Control' => 'max-age=315576000', 'Expires' => 10.years.from_now.httpdate }

  unless ENV['S3_CLOUDFRONT_HOST'].blank?
    Paperclip::Attachment.default_options[:url]           = ':s3_alias_url'
    Paperclip::Attachment.default_options[:s3_host_alias] = ENV['S3_CLOUDFRONT_HOST']
  end

  Paperclip::Attachment.default_options[:s3_credentials] = {
    bucket: ENV.fetch('S3_BUCKET'),
    access_key_id: ENV.fetch('AWS_ACCESS_KEY_ID'),
    secret_access_key: ENV.fetch('AWS_SECRET_ACCESS_KEY'),
    s3_region: ENV.fetch('S3_REGION'),
  }
end