'required|integer', 'enrollment_id' => 'required|integer', 'parent_id' => 'required|integer', 'inventory_item_id' => 'required|integer', 'inventory_item_year_id' => 'required|integer', 'school_year' => 'required|string|max_length[16]', 'quantity' => 'required|integer|greater_than[0]', 'unit_charge_price_cents' => 'required|integer|greater_than[0]', 'total_charge_cents' => 'required|integer|greater_than[0]', 'idempotency_key' => 'required|string|max_length[160]', 'status' => 'required|in_list[issued,reversed]', 'issued_at' => 'required|valid_date[Y-m-d H:i:s]', ]; }