service/account.go

@@ -192,6 +192,16 @@ func (s AccountImpl) Delete(user *types.User, id string) error {
 		return fmt.Errorf("could not parse Id: %w", ErrBadRequest)
 	}
 
+	transactionsCount := 0
+	err = s.db.Get(&transactionsCount, `SELECT COUNT(*) FROM "transaction" WHERE user_id = ? AND account_id = ?`, user.Id, uuid)
+	err = db.TransformAndLogDbError("account Delete", nil, err)
+	if err != nil {
+		return err
+	}
+	if transactionsCount > 0 {
+		return fmt.Errorf("account has transactions, cannot delete: %w", ErrBadRequest)
+	}
+
 	res, err := s.db.Exec("DELETE FROM account WHERE id = ? and user_id = ?", uuid, user.Id)
 	err = db.TransformAndLogDbError("account Delete", res, err)
 	if err != nil {

service/treasure_chest.go

@@ -233,6 +233,16 @@ func (s TreasureChestImpl) Delete(user *types.User, idStr string) error {
 		return fmt.Errorf("treasure chest has children: %w", ErrBadRequest)
 	}
 
+	transactionsCount := 0
+	err = s.db.Get(&transactionsCount, `SELECT COUNT(*) FROM "transaction" WHERE user_id = ? AND treasure_chest_id = ?`, user.Id, id)
+	err = db.TransformAndLogDbError("treasureChest Delete", nil, err)
+	if err != nil {
+		return err
+	}
+	if transactionsCount > 0 {
+		return fmt.Errorf("treasure chest has transactions: %w", ErrBadRequest)
+	}
+
 	r, err := s.db.Exec(`DELETE FROM treasure_chest WHERE id = ? AND user_id = ?`, id, user.Id)
 	err = db.TransformAndLogDbError("treasureChest Delete", r, err)
 	if err != nil {