"Call can throw, but it is not marked with 'try' and the error is not handled "

Question

I'm new to Swift and couldn't solve this error at line:

  .map { JSON(data: $0) }

class func liveInfo() -> Observable<JSON> {
    let request = try! URLRequest(url: someURL, method: .get)
    return session.rx
      .data(request: request)
      .map { JSON(data: $0) }
}

Answer 1

SwiftyJSON's JSON(data:) can throw an exception so you have to mark it with try.

Strict solution:

.map { (data) in
    do {
        return try JSON(data: data)
    }
    catch {
        fatalError("unable to convert data to JSON")
    }
}

Loose solution:

.compactMap { try? JSON(data: $0) }