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Some more code, cosmetics

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This commit is contained in:
Christian Georgi
2020-02-10 22:07:13 +01:00
parent 7b5b2210ae
commit 4ad21a47d6
2 changed files with 26 additions and 7 deletions
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14
packages/bookshop/srv/cat-service.js
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@@ -14,15 +14,15 @@ function _addDiscount2 (each,discount) {
}
/** Reduce stock of ordered books if available stock suffices */
async function _reduceStock (req) {
const { Items: OrderItems } = req.data
// req.on('failed', () => { console.debug ('>>> failed for order', req.data.ID) })
const { Items: orderItems } = req.data
return cds.transaction(req) .run (()=> OrderItems.map (order =>
UPDATE (Books) .set ('stock -=', order.amount)
.where ('ID =', order.book_ID) .and ('stock >=', order.amount)
)) .then (all => all.forEach ((affectedRows,i) => {
return cds.transaction(req) .run (()=> orderItems.map (order =>
UPDATE (Books)
.set ('stock -=', order.amount)
.where ('ID =', order.book_ID) .and ('stock >=', order.amount)
)).then (all => all.forEach ((affectedRows,i) => {
if (affectedRows === 0) req.error (409,
`${OrderItems[i].amount} exceeds stock for book #${OrderItems[i].book_ID}`
`${orderItems[i].amount} exceeds stock for book #${orderItems[i].book_ID}`
)
}))
}