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[英]Vapor/Fluent: Child object not saving when array of uuids in schema
[英]Vapor / Fluent: filtering nested requests
我有一個 Fluent 查詢,如下所示:
var uQuery = User.query(on: req.db)
.filter(\.$id == user.id!)
.with(\.$playerTournaments) {$0.with(\.$tournamentGames)}
.all()
玩家錦標賽有多個比賽,其中包含比賽。 在這種情況下,我不關心比賽,所以 $tournamentGames 允許我直接獲得比賽的比賽。
但我想要的是通過@Parent 屬性 $player 過濾 $tournamentGames 返回的游戲,以便只返回該玩家的游戲。 我怎樣才能做到這一點? 我假設有一個語法
.with(\.$playerTournaments) {$0.with(\.$tournamentGames) { $0.filter(\.$id == user.id!}}
但我還沒弄明白……
編輯:對象之間的關系
User
使用錦標賽定義多對多:
through: TournamentPlayerPivot.self,
from: \.$player,
to: \.$tournament)
var playerTournaments: [Tournament]```
Tournament
與 Game 之間存在互惠關系,但與Game
沒有關系:
through: TournamentGamePivot.self,
from: \.$tournament,
to: \.$game)
var tournamentGames: [Game]```
Tournament is @Parent to ```Match```, which in turn parents ```Game```. Match manages a bunch of non-user-facing stuff to do with determining when tournaments end, but are in the way here.
A ```Game``` has a $player field, which contains the uuid of the User assigned to play it. And a Tournament has an $owner, guaranteed to to be a player/User. Both are one to one.
More questions, happy to answer.
您有兩個選擇 - 您要么急切加載所有數據並使用數組過濾器過濾 Swift 中的關系,要么使用連接。 聯接將更加高效,因為它們只會返回您想要的內容,並且數據庫旨在盡可能高效地執行它們(至少 SQL 個數據庫)。
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