Cosmetics
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@@ -1,6 +1,7 @@
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using { sap.capire.bookshop as my } from '../db/schema';
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@path:'/browse'
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// @impl: './cat-service.js'
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service CatalogService {
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@readonly entity Books as SELECT from my.Books {*,
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@@ -5,18 +5,17 @@ const { Books } = cds.entities
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module.exports = cds.service.impl(srv => {
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srv.after ('READ', 'Books', each => each.stock > 111 && _addDiscount2(each,11))
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srv.before ('CREATE', 'Orders', _reduceStock)
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// srv.before ('*', (req) => { console.debug ('>>>', req.method, req.target && req.target.name) })
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// srv.before ('*', (req) => { console.debug ('>>>', req.method, req.target.name) })
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})
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/** Add some discount for overstocked books */
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function _addDiscount2 (each,discount) {
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each.title += ` -- ${discount}% discount!`
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}
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/** Reduce stock of ordered books if available stock suffices */
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async function _reduceStock (req) {
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const { Items: OrderItems } = req.data
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// req.on('failed', () => {console.debug ('>>> failed for order', req.data.ID)})
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// req.on('failed', () => { console.debug ('>>> failed for order', req.data.ID) })
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return cds.transaction(req) .run (()=> OrderItems.map (order =>
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UPDATE (Books) .set ('stock -=', order.amount)
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