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Fixed submit order -> returned stock was wrong

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Daniel
2021-11-29 15:34:52 +01:00
committed by Daniel Hutzel
parent fa854a2411
commit 1fde0c928b
1 changed files with 5 additions and 6 deletions
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7
bookshop/srv/cat-service.js
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@@ -7,13 +7,12 @@ class CatalogService extends cds.ApplicationService { init(){
// Reduce stock of ordered books if available stock suffices // Reduce stock of ordered books if available stock suffices
this.on ('submitOrder', async req => { this.on ('submitOrder', async req => {
const {book,quantity} = req.data const {book,quantity} = req.data
if (quantity < 1) return req.reject (400,`quantity has to be 1 or more`)
let {stock} = await SELECT `stock` .from (Books,book) let {stock} = await SELECT `stock` .from (Books,book)
if (stock >= quantity) { if (quantity > stock) return req.reject (409,`${quantity} exceeds stock for book #${book}`)
await UPDATE (Books,book) .with (`stock -=`, quantity) await UPDATE (Books,book) .with ({ stock: stock -= quantity })
await this.emit ('OrderedBook', { book, quantity, buyer:req.user.id }) await this.emit ('OrderedBook', { book, quantity, buyer:req.user.id })
return { stock } return { stock }
}
else return req.error (409,`${quantity} exceeds stock for book #${book}`)
}) })
// Add some discount for overstocked books // Add some discount for overstocked books