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gaaaanz schmaler korridor

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Daniel
2019-12-19 18:23:38 +01:00
parent 7f7cd43bff
commit 2f576dbb1b
1 changed files with 18 additions and 7 deletions
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25
packages/bookshop/srv/admin-service.js
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@@ -9,13 +9,16 @@ const db = cds.connect.to ('db')
const { Addresses: externalAddresses } = bupa.entities // projection on external addresses
const { Books, Addresses } = db.entities // entities in local database
console.log (Addresses._service.name, Addresses._service)
module.exports = (admin => {
// Handler to delegate ValueHelp requests to S/4 backend, fetching current user's addresses from there
// admin.on ('READ', 'usersAddresses', (req) => { // REVISIT: all requests go to auto-exposed Addresses
admin.on ('READ', 'Addresses', (req) => {
const { SELECT } = cds.ql(req) //> convenient alternative to bupa.transaction(req).run(SELECT...)
return SELECT.from (externalAddresses) .where ({ contact: req.user.id || 'anonymous' })
return bupa.tx(req) .run (SELECT.from (externalAddresses) .where ({ contact: req.user.id || 'anonymous' }))
// return bupa.tx(req) .read (externalAddresses) .where ({ contact: req.user.id || 'anonymous' }) //> FIXME: doesn't work !?!?
// const { SELECT } = cds.ql(req) //> convenient alternative to bupa.transaction(req).run(SELECT...)
// return SELECT.from (externalAddresses) .where ({ contact: req.user.id || 'anonymous' })
//> this is applying projection from CDS model generically, i.e. the equivalent of:
// const { A_BusinessPartnerAddress } = bupa.entities
// return SELECT.from (A_BusinessPartnerAddress, a => {
@@ -34,14 +37,22 @@ module.exports = (admin => {
// Replicate chosen addresses from S/4 when filing orders.
admin.before ('PATCH', 'Orders', async (req) => {
const ID = req.data.shippingAddress_ID; if (!ID) return //> something else
const { SELECT, INSERT, UPSERT } = cds.ql(req) //> convenient alternative to <srv>.transaction(req).run(SELECT...)
// const address = await SELECT.one.from (externalAddresses) .where ({ //> TODO
const [address] = await SELECT.from (externalAddresses) .where ({
// const { SELECT, INSERT, UPSERT } = cds.ql(req) //> convenient alternative to <srv>.transaction(req).run(SELECT...)
const local = db.transaction (req)
const [replica] = await local.read (Addresses) .where ({
ID, contact: req.user.id
})
if (!replica) {
// const [address] = await bupa.read (externalAddresses) .where ({ //> FIXME -> das erzeugt ein super-komisches Verhalten, mit zweimal PATCH, etc. !!!
// const [address] = await bupa.tx(req) .read (externalAddresses) .where ({ //> FIXME !!!
const [address] = await bupa.tx(req) .run (SELECT.from (externalAddresses) .where ({
ID, contact: req.user.id
}))
if (address) return local.create (Addresses) .entries (address)
}
// const address = await SELECT.one.from (externalAddresses) .where ({ //> TODO
// FIXME: Zweimal INSERT -> constraint violation !!
if (address) return db.tx(req).run (INSERT.into (Addresses) .entries (address))
// if (address) return INSERT.into (Addresses) .entries (address) //> TODO
// if (address) return db.tx(req).run (INSERT.into (Addresses) .entries (address))
// if (address) return UPSERT (Addresses) .entries (address) //> TODO
})