Shrine

No Derivatives in metadata after save file

Question
#1

Hi!
After save file in file_data column is no derivatives:

{“id”: “1/05/4fc5a8-9fcc-4e4b-95d2-dafafc85a355/images.jpeg”, “storage”: “cache”, “metadata”: {“size”: 6932, “filename”: “images.jpeg”, “mime_type”: “image/jpeg”, “namespace_token”: “054fc5a8-9fcc-4e4b-95d2-dafafc85a355”}}

But activerecord_after_save shows me:

…@record=#<ShrineAttachment id: nil, file: nil, attachable_type: “User”, attachable_id: 2, field_name: “photo”, deleted_at: nil, file_data: {“id”=>“1/6a/386146-443b-4fde-a2c3-aa2cadd02d52/80.png”, “storage”=>“store”, “metadata”=>{“filename”=>“80.png”, “size”=>394, “mime_type”=>“image/png”, “namespace_token”=>“6a386146-443b-4fde-a2c3-aa2cadd02d52”}, “derivatives”=>{“resized_for_list”=>{“id”=>“1/resized_for_list_6a/386146-443b-4fde-a2c3-aa2cadd02d52/image_processing20230411-10-x692k6.png”…

storage: :store and derivatives in file_data…

Can someone explain what happen?

#shrine.rb

require "shrine"
require "shrine/storage/file_system"

Shrine.plugin :activerecord

Shrine.storages = {
  store: Shrine::Storage::FileSystem.new("public", prefix: "attachments"),
  cache: Shrine::Storage::FileSystem.new("public", prefix: "cache/attachments")
}

class Shrine::Attacher
  def promote(*)
    create_derivatives
    super
  end
end

#shrine_attachment_uploader.rb

class ShrineAttachmentUploader < Shrine
  plugin ShrinePlugins::TenantLocation
  plugin :derivatives, versions_compatibility: true
  plugin :add_metadata
  # plugin :processing
  # plugin :keep_files
  # plugin :remove_invalid
  # plugin :cached_attachment_data
  # plugin :restore_cached_data
  plugin :validation_helpers
  plugin :validation
  plugin :determine_mime_type
  
  Attacher.derivatives do |original|
    pipeline = ImageProcessing::MiniMagick.source(original)

    resized_for_list = pipeline.resize_to_limit!(400, 300)
    resized_for_show = pipeline.resize_to_limit!(800, 600)

    { resized_for_list: resized_for_list, resized_for_show: resized_for_show }
  end

  def resized_for_show
    #derivatives
  end

  def resized_for_list
    #derivatives
  end
end