attachable_sgid

# File actiontext/lib/action_text/attachable.rb, line 77
    def attachable_sgid
      to_sgid(expires_in: nil, for: LOCATOR_NAME).to_s
    end

    def attachable_content_type
      try(:content_type) || "application/octet-stream"
    end

    def attachable_filename
      filename.to_s if respond_to?(:filename)
    end

    def attachable_filesize
      try(:byte_size) || try(:filesize)
    end

    def attachable_metadata
      try(:metadata) || {}
    end

    def previewable_attachable?
      false
    end

    # Returns the path to the partial that is used for rendering the attachable
    # in Trix. Defaults to +to_partial_path+.
    #
    # Override to render a different partial:
    #
    #   class User < ApplicationRecord
    #     def to_trix_content_attachment_partial_path
    #       "users/trix_content_attachment"
    #     end
    #   end
    def to_trix_content_attachment_partial_path
      to_partial_path
    end

    # Returns the path to the partial that is used for rendering the attachable.
    # Defaults to +to_partial_path+.
    #
    # Override to render a different partial:
    #
    #   class User < ApplicationRecord
    #     def to_attachable_partial_path
    #       "users/attachable"
    #     end
    #   end
    def to_attachable_partial_path
      to_partial_path
    end

    def to_rich_text_attributes(attributes = {})
      attributes.dup.tap do |attrs|
        attrs[:sgid] = attachable_sgid
        attrs[:content_type] = attachable_content_type
        attrs[:previewable] = true if previewable_attachable?
        attrs[:filename] = attachable_filename
        attrs[:filesize] = attachable_filesize
        attrs[:width] = attachable_metadata[:width]
        attrs[:height] = attachable_metadata[:height]
      end.compact
    end

    private
      def attribute_names_for_serialization
        super + ["attachable_sgid"]
      end

      def read_attribute_for_serialization(key)
        if key == "attachable_sgid"
          persisted? ? super : nil
        else
          super
        end
      end
  end