#1 順番修正

backend/db/migrate/20250227211300_create_users.rb

@@ -0,0 +1,11 @@
+class CreateUsers < ActiveRecord::Migration[7.0]
+  def change
+    create_table :users do |t|
+      t.string :name, limit: 255
+      t.string :inheritance_code, limit: 64, null: false
+      t.string :role, limit: 255, null: false
+      t.boolean :banned, default: false, null: false
+      t.timestamps
+    end
+  end
+end