如何从 Combine + Alamofire 错误响应中获取数据值？答案

【问题标题】：How do I get Data value from Combine + Alamofire Error response?如何从 Combine + Alamofire 错误响应中获取数据值？
【发布时间】：2021-01-02 16:45:49
【问题描述】：

下面是我调用 api 的代码，当 api 调用出错时它会返回 Swift.Error。

AccountAPI.postAccount(withSignUpCommand: signUpCommand)
            .sink(receiveCompletion: { [weak self] result in
                guard let self = self else { return }

                switch result {
                    case .finished:
                        self.logger.debug("signUp completed.")
                    case .failure(let error):
                        self.isAuthenticating = false
                        self.logger.error("signUp error : \(error)")
                }
            }, receiveValue: { [weak self] (statusCode, userId) in
                guard let self = self else { return }

                self.logger.debug("signUp status code : \(statusCode)")

                guard (200...299).contains(statusCode) else {
                    return
                }

                self.logger.debug("UserId: \(userId)")
            })
            .store(in: &disposables)

还有我的出版商

static func postAccount(
        withSignUpCommand signUpCommand: SignUpCommand,
        apiResponseQueue: DispatchQueue = CloudHospitalClientAPI.apiResponseQueue
    ) -> AnyPublisher<(Int, String), Error> {
        let url = "\(CloudHospitalClientAPI.identityBasePath)/api/v1/accounts"

        let parameters = JSONEncodingHelper.encodingParameters(forEncodableObject: signUpCommand)

        return Future<(Int, String), Error>.init { promise in
            postAccountWithRequestBuilder(withURLString: url, withParameters: parameters, isBody: true).execute(apiResponseQueue) { result -> Void in
                switch result {
                    case let .success(response):
                        promise(.success((response.statusCode, response.body!)))
                    case let .failure(error):
                        promise(.failure(error))
                }
            }
        }
        .eraseToAnyPublisher()

    }

    static func postAccountWithRequestBuilder(
        withURLString URLString: String,
        withParameters parameters: [String: Any]?,
        isBody: Bool
    ) -> RequestBuilder<String> {

        let url = URLComponents(string: URLString)
        let requestBuilder: RequestBuilder<String>.Type = CloudHospitalClientAPI.requestBuilderFactory.getBuilder()

        return requestBuilder.init(method: "POST", URLString: (url?.string ?? URLString), parameters: parameters, isBody: isBody)
    }

调试时，我得到以下结果。

以下格式的 api 错误响应，我想解析此数据，但根本无法访问此值。

尝试将返回类型更改为自定义错误响应，但没有成功。

请分享一些建议，我可以在其中插入解码错误响应代码并返回调用者函数。

提前致谢。

感谢 Bruno，下面是我编辑的代码。

        AccountAPI.postAccount(withSignUpCommand: signUpCommand)
            .sink(receiveCompletion: { [weak self] result in
                guard let self = self else { return }

                switch result {
                    case .finished:
                        self.logger.debug("signUp completed.")
                    case .failure(let error):
                        self.isAuthenticating = false
                        self.logger.error("signUp error : \(error)")
                        if case let ErrorResponse.error(_, data, _) = error {
                            let decoder = JSONDecoder()
                            let identityErrors = try! decoder.decode([IdentityError].self, from: data!)

                            // TODO: Decode `data` here...
                            self.logger.debug("data: \(String(describing: identityErrors))")

                            self.errors = identityErrors
                        }
                }
            }, receiveValue: { [weak self] (statusCode, userId) in
                guard let self = self else { return }

                self.logger.debug("signUp status code : \(statusCode)")

                guard (200...299).contains(statusCode) else {
                    return
                }

                self.logger.debug("UserId: \(userId)")
            })
            .store(in: &disposables)

【问题讨论】：

标签： swift5 decoding combine openapi-generator

【解决方案1】：

您能否检查一下这是否解决了您的问题？

AccountAPI.postAccount(withSignUpCommand: signUpCommand)
        .sink(receiveCompletion: { [weak self] result in
            guard let self = self else { return }

            switch result {
                case .finished:
                    self.logger.debug("signUp completed.")
                case .failure(let error):
                    self.isAuthenticating = false
                    self.logger.error("signUp error : \(error)")

                    if case let ErrorResponse.error(statusCode, data, error) = error {

                        // TODO: Decode `data` here...
                        
                    }
            }
        }, receiveValue: { [weak self] (statusCode, userId) in
            guard let self = self else { return }

            self.logger.debug("signUp status code : \(statusCode)")
        })
        .store(in: &disposables)

【讨论】：