add migration

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 20240303231629) do
+ActiveRecord::Schema[7.0].define(version: 2024_03_06_141647) do
   create_table "action_text_rich_texts", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
     t.string "name", null: false
     t.text "body", size: :long
@@ -135,7 +135,7 @@
     t.datetime "created_at", precision: nil
     t.datetime "updated_at", precision: nil
     t.integer "parent_id"
-    t.boolean "folder"
+    t.boolean "folder", default: false, null: false
     t.index ["parent_id"], name: "index_documents_on_parent_id"
   end
 

plugins/documents/db/migrate/20240306141647_move_documents_to_active_storage.rb

@@ -0,0 +1,45 @@
+class MoveDocumentsToActiveStorage < ActiveRecord::Migration[7.0]
+  def up
+    change_table :documents do |t|
+      t.boolean :folder, default: false, null: false
+    end
+
+    Document.find_each do |document|
+      if document.data.present? && document.mime.present?
+        document.attachment.attach(create_blob_from_document(document))
+      else
+        document.update(folder: true)
+      end
+    end
+
+    change_table :documents, bulk: true do |t|
+      t.remove :data
+      t.remove :mime
+    end
+  end
+
+  def down
+    change_table :documents, bulk: true do |t|
+      t.binary :data, limit: 16.megabyte
+      t.string :mime
+      t.remove :folder
+    end
+
+    Document.find_each do |document|
+      next unless document.attachment.attached?
+
+      document.update(
+        data: document.attachment.download,
+        mime: document.attachment.blob.content_type
+      )
+    end
+  end
+
+  def create_blob_from_document(document)
+    ActiveStorage::Blob.create_and_upload!(
+      io: StringIO.new(document.data),
+      filename: document.name,
+      content_type: document.mime
+    )
+  end
+end