12 Added notes and colours to customers

db/migrate/20250704091649_add_color_to_customers.rb

@@ -0,0 +1,5 @@
+class AddColorToCustomers < ActiveRecord::Migration[7.1]
+  def change
+    add_column :customers, :color, :string
+  end
+end

db/migrate/20250704092438_update_existing_customers_color.rb

@@ -0,0 +1,9 @@
+class UpdateExistingCustomersColor < ActiveRecord::Migration[7.1]
+  def up
+    Customer.where(color: nil).update_all(color: 'green')
+  end
+
+  def down
+    # No rollback needed - we don't want to set colors back to nil
+  end
+end