Module: RactorRailsShim::ActiveStorageAttachedPatch

Defined in:
lib/ractor_rails_shim/patches/active_storage.rb

Defined Under Namespace

Modules: ActiveStorageServicePatch, BlobBuildPatch, BlobChecksumPatch, BlobMetadataTypePatch

Constant Summary collapse

SHAREABLE_SCOPE_HOST =

Frozen, shareable host used as the defining self of attachment scope lambdas. A frozen Module is Ractor-shareable, so a lambda created via SHAREABLE_SCOPE_HOST.instance_eval { -> { where(name: name) } } has a shareable self and makes Ractor.make_shareable(reflections) succeed.

Module.new.freeze

Instance Method Summary collapse

Instance Method Details

#has_many_attached(name, dependent: :purge_later, service: nil, strict_loading: false) {|reflection| ... } ⇒ Object

Yields:

  • (reflection) 


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# File 'lib/ractor_rails_shim/patches/active_storage.rb', line 193

def has_many_attached(name, dependent: :purge_later, service: nil, strict_loading: false)
  ActiveStorage::Attached::Model.validate_service_configuration(service, self, name) unless service.is_a?(Proc)

  generated_association_methods.class_eval <<-CODE, __FILE__, __LINE__ + 1
    # frozen_string_literal: true
    def #{name}
      @active_storage_attached ||= {}
      @active_storage_attached[:#{name}] ||= ActiveStorage::Attached::Many.new("#{name}", self)
    end

    def #{name}=(attachables)
      attachables = Array(attachables).compact_blank
      pending_uploads = attachment_changes["#{name}"].try(:pending_uploads)

      attachment_changes["#{name}"] = if attachables.none?
        ActiveStorage::Attached::Changes::DeleteMany.new("#{name}", self)
      else
        ActiveStorage::Attached::Changes::CreateMany.new("#{name}", self, attachables, pending_uploads: pending_uploads)
      end
    end
  CODE

  scope_lambda = SHAREABLE_SCOPE_HOST.instance_eval { ->(record = nil) { where(name: name) } }
  has_many :"#{name}_attachments", scope_lambda, as: :record, class_name: "ActiveStorage::Attachment", inverse_of: :record, dependent: :destroy, strict_loading: strict_loading
  has_many :"#{name}_blobs", through: :"#{name}_attachments", class_name: "ActiveStorage::Blob", source: :blob, strict_loading: strict_loading

  scope :"with_attached_#{name}", -> {
    if ActiveStorage.track_variants
      includes("#{name}_attachments": { blob: {
        variant_records: { image_attachment: :blob },
        preview_image_attachment: { blob: { variant_records: { image_attachment: :blob } } }
      } })
    else
      includes("#{name}_attachments": :blob)
    end
  }

  after_save { attachment_changes[name.to_s]&.save }

  after_commit(on: %i[ create update ]) { attachment_changes.delete(name.to_s).try(:upload) }

  reflection = ActiveRecord::Reflection.create(
    :has_many_attached,
    name,
    nil,
    { dependent: dependent, service_name: service },
    self
  )
  yield reflection if block_given?
  ActiveRecord::Reflection.add_attachment_reflection(self, name, reflection)
end

#has_one_attached(name, dependent: :purge_later, service: nil, strict_loading: false) {|reflection| ... } ⇒ Object

Yields:

  • (reflection) 


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# File 'lib/ractor_rails_shim/patches/active_storage.rb', line 141

def has_one_attached(name, dependent: :purge_later, service: nil, strict_loading: false)
  ActiveStorage::Attached::Model.validate_service_configuration(service, self, name) unless service.is_a?(Proc)

  generated_association_methods.class_eval <<-CODE, __FILE__, __LINE__ + 1
    # frozen_string_literal: true
    def #{name}
      @active_storage_attached ||= {}
      @active_storage_attached[:#{name}] ||= ActiveStorage::Attached::One.new("#{name}", self)
    end

    def #{name}=(attachable)
      attachment_changes["#{name}"] =
        if attachable.nil? || attachable == ""
          ActiveStorage::Attached::Changes::DeleteOne.new("#{name}", self)
        else
          ActiveStorage::Attached::Changes::CreateOne.new("#{name}", self, attachable)
        end
    end
  CODE

  # Ractor fix: scope lambda built with a shareable `self` so the
  # reflection (and therefore `User.reflections`) is Ractor-shareable.
  scope_lambda = SHAREABLE_SCOPE_HOST.instance_eval { ->(record = nil) { where(name: name) } }
  has_one :"#{name}_attachment", scope_lambda, class_name: "ActiveStorage::Attachment", as: :record, inverse_of: :record, dependent: :destroy, strict_loading: strict_loading
  has_one :"#{name}_blob", through: :"#{name}_attachment", class_name: "ActiveStorage::Blob", source: :blob, strict_loading: strict_loading

  scope :"with_attached_#{name}", -> {
    if ActiveStorage.track_variants
      includes("#{name}_attachment": { blob: {
        variant_records: { image_attachment: :blob },
        preview_image_attachment: { blob: { variant_records: { image_attachment: :blob } } }
      } })
    else
      includes("#{name}_attachment": :blob)
    end
  }

  after_save { attachment_changes[name.to_s]&.save }

  after_commit(on: %i[ create update ]) { attachment_changes.delete(name.to_s).try(:upload) }

  reflection = ActiveRecord::Reflection.create(
    :has_one_attached,
    name,
    nil,
    { dependent: dependent, service_name: service },
    self
  )
  yield reflection if block_given?
  ActiveRecord::Reflection.add_attachment_reflection(self, name, reflection)
end