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Add transaction for order creation #205

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Add transaction for order creation #205

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Add transaction for order creation
Somewellich Jul 15, 2026
59ce230
fix: use LAST_INSERT_ID to link order items and synchronize inventory…
Somewellich Jul 15, 2026
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19 changes: 14 additions & 5 deletions task.sql
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Original file line number Diff line number Diff line change
@@ -1,11 +1,20 @@
-- Use our database
USE ShopDB;

-- Some data should be created outside the transaction (here)

-- Start the transaction
START TRANSACTION;
INSERT INTO Orders (CustomerID, Date)
VALUES (1, '2023-01-01');
Comment on lines +4 to +5

@mateacademy-ai-mentor mateacademy-ai-mentor Jul 15, 2026

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Here you insert the order, but you never capture the generated ID; later you assume it is 1. To meet the requirement of creating a new order reliably, consider storing LAST_INSERT_ID() in a variable so you can reference the actual order you just created.


-- And some data should be created inside the transaction

START TRANSACTION;

SET @order_id = LAST_INSERT_ID();
SET @item_count = 1;

INSERT INTO OrderItems (OrderID, ProductID, Count)
VALUES (@order_id, 1, @item_count);

UPDATE Products
SET WarehouseAmount = WarehouseAmount - @item_count
WHERE ID = 1;

COMMIT;
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