swift - Cannot convert return expression of type '(AnyPublisher<DemoObject, Never>, APIError)' to return type 'AnyPublisher<DemoObject, APIError>'

Question

func testData()->AnyPublisher<DemoObject, APIError> {

    var data = DummyData().decodeClaimDetails()!
    
    return (Just(data).eraseToAnyPublisher(),
            APIError.httpError(200))
    
}

I got this error. Cannot convert return expression of type '(AnyPublisher<DemoObject, Never>, APIError)' to return type 'AnyPublisher<DemoObject, APIError>'

How can I return a type that is AnyPublisher<DemoObject, APIError>?

question from:https://stackoverflow.com/questions/66055354/cannot-convert-return-expression-of-type-anypublisherdemoobject-never-apie

Answer 1

You want

func testData()->AnyPublisher<DemoObject, APIError> {
    let d: DemoObject = // ...
    return Just<DemoObject>(d)
        .setFailureType(to: APIError,self) // <--
        .eraseToAnyPublisher()
}