在SwiftUI上的Firebase中使用updateData函数时出错 [英] Error when using updateData function in Firebase on SwiftUI

问题描述

我试图使用updateData(fields:[AnyHashable:Any])函数来更新文档中的数组.一段时间后，我遇到了一个我无法解决的非常奇怪的错误，它工作正常，这是错误消息:

I tried to use the updateData(fields: [AnyHashable : Any]) function to update an array in a document. It was working fine after a while I got a really strange error which I was unable to resolve, here's the error message:

global function '__designTimeString(_:fallback:)' requires that 'AnyHashable' conform to 'ExpressibleByStringLiteral'

----------------------------------------

CompileDylibError: Failed to build Data.swift

Compiling failed: global function '__designTimeString(_:fallback:)' requires that 'AnyHashable' conform to 'ExpressibleByStringLiteral'

Data.swift:115:17: error: global function '__designTimeString(_:fallback:)' requires that 'AnyHashable' conform to 'ExpressibleByStringLiteral'
                __designTimeString("#64647.[4].[6].[3].modifier[2].arg[0].value.[0].key.[0].value", fallback: "reviews"): FieldValue.arrayUnion([id])
                ^
SwiftUI.__designTimeString:1:13: note: where 'T' = 'AnyHashable'
public func __designTimeString<T>(_ key: String, fallback: T) -> T where T : ExpressibleByStringLiteral

我一直在四处逛逛，但实际上找不到有关此类错误的详细信息，请帮助:(

I have been looking around but couldn't really find much details on this kind of errors, please help :(

这是我的代码中导致此错误的部分:

here's the part of my code that caused this error:

db.collection("restaurants").document(restaurantId).updateData([
     "reviews": FieldValue.arrayUnion([id])
     ]) { err in
        if let err = err {
            print("Error updating document: \(err)")
        } else {
            print("Document successfully updated")
        }
    }

推荐答案

使用 updateData 时，键必须为 String s.

When using updateData, the keys need to be Strings.

您是否考虑过使用Codable?导入 FirebaseFirestoreSwift ，然后使用 db.collection("restaurants").addDocument(from:review)保存数据.此处有更多详细信息: SwiftUI:使用以下方法映射Firestore文档Swift Codable

Have you considered using Codable? Import FirebaseFirestoreSwift, and then save data using db.collection("restaurants").addDocument(from: review). More details here: SwiftUI: Mapping Firestore Documents using Swift Codable

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