fix: 合并多件档口入库码回写 (#240)

admin/repository/inner_code.go

@@ -50,6 +50,38 @@ const (
 	InnerCodeImportRestored InnerCodeImportOutcome = "restored"
 )
 
+// InnerCodeCodeOwner 是导入事务中核对单件码归属所需的最小现有记录。
+type InnerCodeCodeOwner struct {
+	ID          int64
+	OrderNumber string
+	Stall       string
+	SpecKey     string
+	InnerCode   string
+}
+
+// LockInnerCodeCodeOwnersByDate 锁定同日现有记录，供 service 拆分聚合值并防止单件码串单。
+// 查询包含软删除记录，因为软删除记录仍保留业务唯一键并可能被重新导入恢复。
+func LockInnerCodeCodeOwnersByDate(tx *sql.Tx, businessDate string) ([]InnerCodeCodeOwner, error) {
+	rows, err := tx.Query(`SELECT id,order_number,stall,spec_key,inner_code
+		FROM syb_inner_code_records WHERE business_date=? ORDER BY id FOR UPDATE`, businessDate)
+	if err != nil {
+		return nil, fmt.Errorf("锁定同日档口入库码记录失败: %w", err)
+	}
+	defer rows.Close()
+	owners := make([]InnerCodeCodeOwner, 0)
+	for rows.Next() {
+		var owner InnerCodeCodeOwner
+		if err := rows.Scan(&owner.ID, &owner.OrderNumber, &owner.Stall, &owner.SpecKey, &owner.InnerCode); err != nil {
+			return nil, fmt.Errorf("读取同日档口入库码记录失败: %w", err)
+		}
+		owners = append(owners, owner)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("遍历同日档口入库码记录失败: %w", err)
+	}
+	return owners, nil
+}
+
 // UpsertInnerCodeImportRow 按已确认业务键写入一行。
 // 必须在事务中调用；先锁定业务键，避免另一个唯一键冲突时更新错行。
 func UpsertInnerCodeImportRow(tx *sql.Tx, row model.InnerCodeImportRow, now string) (InnerCodeImportOutcome, error) {