Initial commit

db/migrate/20200305140516_make_u_ui_d_not_nil.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class MakeUUIDNotNil < ActiveRecord::Migration[5.2]
+  def change
+    case ActiveRecord::Base.connection.adapter_name
+    when 'Mysql2'
+      execute('UPDATE orders SET uuid = (UNHEX(REPLACE(UUID(), "-",""))) WHERE uuid IS NULL')
+      change_column :orders, :uuid, :binary, limit: 16, index: { unique: true }, after: :id, null: false
+
+    when 'PostgreSQL'
+      enable_extension 'uuid-ossp'
+      enable_extension 'pgcrypto'
+
+      remove_column :orders, :uuid
+      add_column :orders, :uuid, :uuid, index: { unique: true }, after: :id, null: false, default: 'gen_random_uuid()'
+
+    else
+      raise "Unsupported adapter: #{ActiveRecord::Base.connection.adapter_name}"
+    end
+  end
+end