Vapor 4 无法使用 Put HTTP 请求更新可选父项

Question

我有一个名为管辖权的模型，其中包含政治管辖权。现在有司法管辖区可以位于其他司法管辖区内，所以我有一个可选的父管辖区...

现在我可以很好地创建新的管辖区，但是如果我尝试使用放置请求来更新管辖区父级，我会收到以下错误：

FluentKit/OptionalParent.swift:20: Fatal error: OptionalParent relation OptionalParent<Jurisdiction, Jurisdiction>(key: parent_jurisdiction_id) is get-only.
2022-05-18 13:39:12.421882-0700 Run[32583:5555712] FluentKit/OptionalParent.swift:20: Fatal error: OptionalParent relation OptionalParent<Jurisdiction, Jurisdiction>(key: parent_jurisdiction_id) is get-only.```

辖区模型

import Fluent
import Vapor

final class Jurisdiction: Model, Content {
    static let schema = "jurisdictions"
    
    @ID(key: .id)
    var id: UUID?

    @OptionalParent(key: "parent_jurisdiction_id")
    var jurisdiction: Jurisdiction?
    
    @Field(key: "name")
    var name: String
    
    @Field(key: "scope")
    var scope: String
    
    @Children(for: \.$jurisdiction)
    var jurisdictions: [Jurisdiction]
    
    
    init() { }

    init(name:String, scope:String,parentJurisdictionID:UUID? = nil) {
        self.name = name
        self.scope = scope
        self.$jurisdiction.id = parentJurisdictionID
    }
}

辖区迁移

import Foundation
import Vapor
import Fluent
import FluentPostgresDriver

struct CreateJurisdiction: Migration {
    
    func prepare(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions")
            .id()
            //parent fields
        
            //attribute fields
            .field("name", .string, .required)
            .field("scope",.string, .required)
            
            //make unique on:
            .unique(on: "name", "scope")
            
            //create scheme
            .create()
    }

    func revert(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions").delete()
    }
}

struct AddParentJurisdictionToJurisdictions: Migration {
    func prepare(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions")
            .field("parent_jurisdiction_id", .uuid, .references("jurisdictions", "id"))
            .update()
    }
    func revert(on database: Database) -> EventLoopFuture<Void> {
        database.schema("jurisdictions")
            .deleteField("parent_jurisdiction_id")
            .delete()
    }
}

管辖权控制者

import Foundation
import Vapor
import Fluent
import FluentPostgresDriver

struct JurisdictionsController: RouteCollection {
    func boot(routes: RoutesBuilder) throws {
        
        let jurisdictions = routes.grouped("jurisdictions")
        jurisdictions.put(use: update)

           }
        
        }
    //
    
    func update(req:Request) throws -> EventLoopFuture<HTTPStatus> {
        
        let jurisdiction = try req.content.decode(Jurisdiction.self)
        
        return  Jurisdiction.find(jurisdiction.id,on: req.db)
            .unwrap(or:Abort(.notFound))
            .flatMap {
                [=13=].name = jurisdiction.name
                [=13=].scope = jurisdiction.scope
                [=13=].jurisdiction = [=13=].jurisdiction //if I remove this line it works
                return [=13=].update(on: req.db).transform(to: .ok)
            }

    }
    
    

}

使用如下所示的 put http 请求：http://localhost:8080/jurisdictions 包含以下内容会产生错误...不知道该怎么做。

{
    "scope": "locasl",
    "id": "0C6D5F6E-0244-4ABE-847F-2AF89CA27C30",
    "jurisdiction": {
        "id": "128133B0-25FE-4B6C-B211-CE01AA236AF9"
    },
    "name": "local"
}

Answer 1

对于 Fluent 和关系，如果您尝试设置属性，则需要通过属性包装器而不是属性本身来设置。所以在你的情况下应该是

[=10=].$jurisdiction.id = jurisdiction.id

这允许您仅使用父 ID 来更新关系，而不需要整个父 ID，就像初始化程序一样。

Vapor 4 无法使用 Put HTTP 请求更新可选父项

Vapor 4 Unable to Update Optional Parent with Put HTPP Request

swift

vapor

vapor-fluent

辖区模型

辖区迁移

管辖权控制者