Return Children and Siblings values in response - fluent

Question

It's probably a trivial question, but I couldn't solve it and didn't find the answer.
I have 3 tables related to each other as Parent-Child and Siblings. And I want to return some values form all of the tables and the same JSON response.
final class ClimbingGym: Model, Content {
static let schema = "climbing_gyms"
#ID(key: .id)
var id: UUID?
#Field(key: "name")
var name: String
#Field(key: "description")
var description: String
#Siblings(through: ClimbingDisciplineClimbingGym.self, from: \.$gym, to: \.$discipline)
var disciplines: [ClimbingDiscipline]
#Children(for: \.$gym)
var socialNetworks: [SocialNetwork]
init() { }
init(
id: UUID? = nil,
name: String,
description: String,
) {
self.id = id
self.name = name
self.description = description
}
}
enum ClimbingDisciplineType: String, Codable, CaseIterable, Equatable {
static let schema = "climbing_discipline_type"
case lead
case boulder
case speed
}
final class ClimbingDiscipline: Model, Content {
static let schema = "climbing_disciplines"
#ID(key: .id)
var id: UUID?
#Enum(key: "type")
var type: ClimbingDisciplineType
init() { }
init(
id: UUID? = nil,
type: ClimbingDisciplineType
) {
self.id = id
self.type = type
}
}
final class SocialNetwork {
static let schema = "social_networks"
#ID(key: .id)
var id: UUID?
#Field(key: "link")
var link: String
#Parent(key: "gym_id")
var gym: ClimbingGym
init() { }
init(
id: UUID? = nil,
link: String,
gym: ClimbingGym
) throws {
self.id = id
self.link = link
self.$gym.id = try gym.requireID()
}
}
And I want to return that model:
struct ClimbingGymResponse: Codable, Content {
let id: UUID
let name: String
let description: String
let disciplines: [ClimbingDisciplineType]
let socialNetworks: [String]
}
so the query that I'm using now looks like that
func getAll(req: Request) throws -> EventLoopFuture<[ClimbingGymResponse]> {
ClimbingGym
.query(on: req.db)
.join(children: \ClimbingGym.$socialNetworks)
.join(siblings: \ClimbingGym.$disciplines)
.all()
}
and it obviously doesn't work, because it returns [ClimbingGym] instead of [ClimbingGymResponse].
So how can I transform one to another?
I have problems with filling disciplines: [ClimbingDisciplineType] and socialNetworks: [String] field for each gym
Thank you!

Answer 1

You can map the array of results into the type you want. So
ClimbingGym
.query(on: req.db)
.with(\.$socialNetworks)
.with(\.$disciplines)
.all().flatMapThrowing { gyms in
try gyms.map { try ClimbingGymResponse(id: $0.requireID(), ...) }
}