wip multi orders

db/migrate/20250430091541_add_ends_to_multi_order.rb

@@ -0,0 +1,16 @@
+class AddEndsToMultiOrder < ActiveRecord::Migration[7.0]
+  def change
+    add_column :multi_orders, :ends, :datetime
+
+    reversible do |dir|
+      dir.up do
+        MultiOrder.reset_column_information
+
+        MultiOrder.find_each do |multi_order|
+          max_ends = multi_order.orders.maximum(:ends)
+          multi_order.update_columns(ends: max_ends) if max_ends.present?
+        end
+      end
+    end
+  end
+end