Cannot find type 'AnyCancellable' in scope from amplify code snippit

Question

import Foundation
import SwiftUI
import Amplify


class MovesAPI: ObservableObject {
    
    
    @Published var todoLIst: [MoveType?] = [nil]
    
    
    init() {
        listTodos()
    }
    
    func listTodos() -> AnyCancellable { //cannot find type 'AnyCancellable' in scope
        let moveType = MoveType.keys
        let sink = Amplify.API.query(request: .paginatedList(MoveType.self)) //Generic parameter 'R' could not be inferred //Type 'GraphQLRequest<_>' has no member 'paginatedList'
            .resultPublisher
            .sink {
                if case let .failure(error) = $0 {
                    print("Got failed event with error \(error)")
                }
            }
            receiveValue: { result in
            switch result {
                case .success(let todos):
                    print("Successfully retrieved list of todos: \(todos)")
                case .failure(let error):
                    print("Got failed result with \(error.errorDescription)")
                }
            }
        return sink
    }

}

Ultimately my goal is to fetch all the models of type MoveType from the amplify GraphQL API. This is a code snippet pasted directly into my project and I'm getting these type errors. any idea why? From amplify, docs (https://docs.amplify.aws/lib/graphqlapi/query-data/q/platform/ios#query-by-id) all I did was change the model names to match my backend and remove query params.

Add 'import Combine' at the top. It's part of the Combine framework. — nicksarno, Mar 13 '21 at 03:31

score 24 · Answer 1 · answered Apr 16 '21 at 19:35

24

I think you need:

import Combine

answered Apr 16 '21 at 19:35

Jan Polzer

361
2
5

That's not in scope for me. – Neo42 Sep 21 '22 at 17:23

score 2 · Answer 2 · answered May 01 '21 at 03:23

2

I faced this problem of paginatedList code snippet from amplify docs not working as I downloaded Amplify using Cocoapods. When I followed the instructions to download Amplify from Swift Package Manager (SPM) instead at Amplify iOS Github , the paginatedList not working problem is solved. Importing the Combine framework into my Xcode project did not solve the paginatedList problem.

answered May 01 '21 at 03:23

Ivaan Chin

31
3

I tried installing with SPM but still getting the `//Generic parameter 'R' could not be inferred //Type 'GraphQLRequest<_>' has no member 'paginatedList'` – Oluwatobi Omotayo May 22 '21 at 15:24
Did you try relaunching your Xcode project workspace? – Ivaan Chin May 24 '21 at 02:42
Yes I did but still the same – Oluwatobi Omotayo Jun 03 '21 at 17:38

score 0 · Answer 3 · answered Mar 13 '21 at 02:03

okay got it working, just had to go way simpler, I switched off using the combined mode

import Foundation
import SwiftUI
import Amplify


class MovesAPI: ObservableObject {
    
    
    @Published var todoLIst: [MoveType?] = [nil]
    
    
    init() {
    }
    
    func listTodos() {
        print("listing todos")
    
        Amplify.API.query(request: .list(MoveType.self)) { event in
            switch event {
               case .success(let result):
                   switch result {
                   case .success(let todos):
                       print("Successfully retrieved list of todos: \(todos)")
                   case .failure(let error):
                       print("Got failed result with \(error.errorDescription)")
                   }
               case .failure(let error):
                   print("Got failed event with error \(error)")
               }
           }
    
    }

}

still, if anyone knows why the code snippets from amplify docs weren't working I would love to know.

Cannot find type 'AnyCancellable' in scope from amplify code snippit

3 Answers3