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This commit is contained in:
Christian Georgi
2020-02-09 11:26:45 +00:00
parent 452b442246
commit 2ca71b0f7d
2 changed files with 3 additions and 3 deletions
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1
packages/bookshop/srv/cat-service.cds
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@@ -1,6 +1,7 @@
using { sap.capire.bookshop as my } from '../db/schema'; using { sap.capire.bookshop as my } from '../db/schema';
@path:'/browse' @path:'/browse'
// @impl: './cat-service.js'
service CatalogService { service CatalogService {
@readonly entity Books as SELECT from my.Books {*, @readonly entity Books as SELECT from my.Books {*,

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