Vapor: route return before all modification done - future

Question

I have following route:
router.post([Page].self, at: "/fetchStatusOfManagedReleases") { (req, pages) -> Future<[Page]> in
let eventIds = pages.map { $0.events }.flatMap { $0 }.map { $0.id }
return Release.query(on: req).filter(\.fbId ~~ eventIds).all().map { releases in
var result: [Page] = []
for p in pages {
let page = p
var pageEvents: [Event] = []
for e in p.events {
let event = e
if let release = releases.first(where: { $0.fbId == e.id }) {
event.inProgress = release.inProgress
event.purpose = release.purpose
_ = try release.testPrices.query(on:req).all().map { testP in
event.testPrices = testP // <--- this line is not applied
}
} else {
event.inProgress = false
}
pageEvents.append(event)
}
page.events = pageEvents
result.append(page)
}
return result
}
}
Unfortunatelly event.testPrices = testP is not applied, it will e not part of the response. What can I do? At some cases I do not need to postpone "return". How can I dissolve scheduling issue?

Answer 1

I do a ~~ operation on TestPrice also as for Release before.
router.post([Page].self, at: "/fetchStatusOfManagedReleases") { (req, pages) -> Future<[Page]> in
let eventIds = pages.map { $0.events }.flatMap { $0 }.map { $0.id }
return Release.query(on: req).filter(\.fbId ~~ eventIds).all().flatMap { releases in
let releaseInnerIds = releases.map {$0.id}
return TestPrice.query(on: req).filter(\.id ~~ releaseInnerIds).all().map { testPrices in
var result: [Page] = []
for p in pages {
let page = p
var pageEvents: [Event] = []
for e in p.events {
let event = e
if let release = releases.first(where: { $0.fbId == e.id }) {
event.inProgress = release.inProgress
event.purpose = release.purpose
event.testPrices = testPrices.compactMap({testPrice in
if testPrice.release.parentID == release.id {
return testPrice
} else {
return nil
}
})
} else {
event.inProgress = false
}
pageEvents.append(event)
}
page.events = pageEvents
result.append(page)
}
return result
}
}
}