How to conditionally get price*quantity using CASE
If I have sale_price, I will use sale_price * quantity to represent the total price, If you don't have a sale_price, you need to express the total price as Price_origin * quantity.
I tried using CASE as below but got this error.
Error 1064 (42000): There is an error in your SQL syntax; check the manual for your MySQL server version for ') )AS products FROM users u JOIN cart_order c_o ON c_o.user_id = Correct syntax to use around u'
What did i do wrong? Is there any other method? I need help.
const readUserCart = async userId => {
const userCart = await myDataSource.query(
`SELECT u.id AS userId, u.name AS userName,
JSON_ARRAYAGG(
JSON_OBJECT(
'productName', p.name,
'quantity', c_o.quantity,
'priceOrigin', REPLACE(p.price_origin, '.', ','),
'salePrice', REPLACE(p.sale_price, '.', ','),
'productThumbnail', t_i.default_img,
'status', c_o.status,
'price', CASE
WHEN p.sale_price = null
THEN REPLACE(p.price_origin * quantity, '.', ',')
ELSE REPLACE(p.sale_price * quantity, '.', ',')
)
)AS products
FROM users u
JOIN cart_order c_o ON c_o.user_id = u.id
JOIN products p ON p.id = c_o.product_id
WHERE u.id = ?
GROUP BY u.id`,
[userId]
);
return userCart;
};