CoreData object to JSON in Swift 3

Question

I\'m struggling to get my CoreData objects into JSON so that I can use it to send to a web server.

This is how I currently fetch my objects from CoreData:

Answer 1

Here the code as an extension. Based on KavyaKavita's answer.

extension NSManagedObject {
  func toJSON() -> String? {
    let keys = Array(self.entity.attributesByName.keys)
    let dict = self.dictionaryWithValues(forKeys: keys)
    do {
        let jsonData = try JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted)
        let reqJSONStr = String(data: jsonData, encoding: .utf8)
        return reqJSONStr
    }
    catch{}
    return nil
  }
}

Usage:

let jsonString = YourCoreDataObject.toJSON()
print(jsonString)