From Swift object to json (formated [String: Any]) for alamofire REST post parameter (defined as [String: Any])

Question

My purpose is to execute a REST post request via Alamofire.

I have an object:

struct Dog: Codable {
    var name: String
    var owner: String
}

I use this :

let JSONString = user.toJSONString(prettyPrint: true) //ObjectMapper call 

returning :

{
    "name" : "Jon",
    "owner" : "Jon Doe"
}

But I want a [String: Any] structure, suitable for alamofire request like :

[
    "name" : "Jon",
    "owner" : "Jon Doe"
]

How to do that ?

Answer 1

Your Dog is not correctly configured to use ObjectMapper, missing Mappable protocol.

struct Dog: Mappable  {
    var name: String?
    var owner: String?

    init?(map: Map) {

    }

    // Mappable
    mutating func mapping(map: Map) {
        name    <- map["name"]
        owner   <- map["owner"]
    }
}

Then you can use BaseMappable.toJSON to pass to Alamofire's parameter, which is [String: Any]

let parameters: Parameters = user.toJSON()
_ = Alamofire.request(theURL, method:.post, parameters: parameters, encoding: JSONEncoding.default).validate().responseJSON() {
    // -----...
}

---

PS: Your user mustn't be a Dog I guess? :P