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I am having the trouble in mapping json to my objects array with ObjectMapper. Here is my model object.
class Participant : Mappable {
var user_global_id: String!
var user_app_id: String!
init(){
}
required init?(_ map: Map) {
}
// Mappable
func mapping(map: Map) {
user_global_id <- map["user_global_id"]
user_app_id <- map["user_app_id"]
}
}
And my json looks: "[{\"user_global_id\":5093363330056192,\"user_app_id\":11}]"
I am calling ObjectMapper:
let participants = Mapper<[Participant]>().map(json["registeredParticipants"])
Above line gives error: Type '[Participant]' does not conform to protocol 'Mappable'
530
Read Object From JSON via URL ObjectMapper objectMapper = new ObjectMapper(); URL url = new URL("file:data/car. json"); Car car = objectMapper. readValue(url, Car. class);
We can easily convert JSON data into a map because the JSON format is essentially a key-value pair grouping and the map also stores data in key-value pairs. Let's understand how we can use both JACKSON and Gson libraries to convert JSON data into a Map.
The simple readValue API of the ObjectMapper is a good entry point. We can use it to parse or deserialize JSON content into a Java object. Also, on the writing side, we can use the writeValue API to serialize any Java object as JSON output.
The main mistake is in passing the array as generic attribute. Here is the solution
Mapper<Participant>().mapArray(json["registeredParticipants"])
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