实例方法“ save（_：where：completion :)”要求“ PostModel”符合“ Model”

Question

我正在尝试将AWS Amplify DataStore集成到我的Swift应用程序中。但是我继续得到这个错误实例方法'save（_：where：completion :)'要求'PostModel'符合'Model'。这是什么意思？

import Foundation
import Amplify
import AmplifyPlugins

protocol PostingAmplify {
    func addPost()
}

extension PostingAmplify {
    func addPost() {
        let post = PostModel(username: "champ", text: "pog", mediaLink: "pog", year: 1, month: 1, day: 1, hour: 1, minute: 1, second: 1)
        
        Amplify.DataStore.save(
            post
        ) {
            switch $0 {
            case .success:
                print("Added post")
            case .failure(let error):
                print("Error adding post - \(error.localizedDescription)")
            }
        }
    }
}

实例方法'save（_：where：completion :)'要求'PostModel'符合'Model'

这是邮政模型

import Foundation

struct PostModel: Decodable {
    var username: String
    var text: String
    var mediaLink: String
    var year: Int
    var month: Int
    var day: Int
    var hour: Int
    var minute: Int
    var second: Int
}

Answer 1

您必须使PostModel符合Model协议

struct PostModel: Model, Decodable { // add the conformance
    // add the protocol requirements...
}