add uuid to active storage blob

config/initializers/active_storage.rb

@@ -19,6 +19,16 @@ ActiveSupport.on_load(:active_storage_attachment) do
 end
 
 ActiveSupport.on_load(:active_storage_blob) do
+  attribute :uuid, :string, default: -> { SecureRandom.uuid }
+
+  def uuid
+    super || begin
+      new_uuid = SecureRandom.uuid
+      update_columns(uuid: new_uuid)
+      new_uuid
+    end
+  end
+
   def delete
     service.delete(key)
   end

db/migrate/20240218082157_add_uuid_to_active_storage_blobs.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddUuidToActiveStorageBlobs < ActiveRecord::Migration[7.1]
+  def change
+    add_column :active_storage_blobs, :uuid, :string
+
+    add_index :active_storage_blobs, :uuid, unique: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_02_03_113455) do
+ActiveRecord::Schema[7.1].define(version: 2024_02_18_082157) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -74,7 +74,9 @@ ActiveRecord::Schema[7.1].define(version: 2024_02_03_113455) do
     t.bigint "byte_size", null: false
     t.string "checksum"
     t.datetime "created_at", null: false
+    t.string "uuid"
     t.index ["key"], name: "index_active_storage_blobs_on_key", unique: true
+    t.index ["uuid"], name: "index_active_storage_blobs_on_uuid", unique: true
   end
 
   create_table "active_storage_variant_records", force: :cascade do |t|