Object Mapper class use to store data in Core Data

Question

Let start from background of my problem.

I have a Person class which is used to parse JSON response

class Person: NSObject, Mappable {

        var ID : String?
        var firstName : String?
        var lastName : String?

        convenience required init?(map: Map) {
                self.init()

            }

            func mapping(map: Map) {
                patientsCount <- map["patientsCount"]
                status <- map["status"]
                message <- map["Message"]
                patientSearchArray <- map["patientsList_JSON"]
            }
    }

While on the other I have another class names PersonMO which is used to save record in CoreData

        @objc(Event)
        class PersonMO: NSManagedObject {

        @NSManaged var ID : String?
        @NSManaged var firstName : String?
        @NSManaged var lastName : String?

    }

Now comes to main point. The problem I am facing is that I have to create two different classes for one purpose. Just like When JSON comes form Server Side then I have to parse it into Person class and then I want to save that Person into Core Data for that I have to convert Person class object to PersonMO class object. Which seems like a bad practice. Is there any way to use just one Class Person will be used to parse JSON and at the same time I want to use that Person class to store data in Core Data.

It doesn't look like ObjectMappper supports this. But ObjectMappper is open source, so you could modify it and send a pull request to incorporate your change. — Tom Harrington, May 17 '17 at 14:58
Did you ever find a solution to this if so please share as I am facing the same issue. — rmp, Oct 18 '17 at 20:10

Anil Varghese · Answer 1 · 2017-05-17T09:43:48.957

0

A single Person class like this should be enough, would serve both cases.

class Person: NSManagedObject, Mappable { 

@NSManaged var ID : String?
@NSManaged var firstName : String?
@NSManaged var lastName : String?

convenience required init?(map: Map) {
    self.init()

}

func mapping(map: Map) {
    patientsCount <- map["patientsCount"]
    status <- map["status"]
    message <- map["Message"]
    patientSearchArray <- map["patientsList_JSON"]
}
}

NSManagedObject is subclass of NSObject so it can be used just like your Person class with Mappable. @NSManaged is a indication that its managed by CoreData, still it can be used like normal variables.

edited May 17 '17 at 09:43

answered May 17 '17 at 09:37

Anil Varghese

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I have already tried this approach. When you set NSManagedObject as a Parent class you have to implement NSManagedObject's init methods then init?(map: Map) method does not call. So also mapping(map: Map) will also not called. – Usman Javed May 17 '17 at 09:45
What library are you using for Mapping? wanted to know how init?(map: Map) is getting called – Anil Varghese May 17 '17 at 09:53
I am using ObjectMappper to parse JSON response. – Usman Javed May 17 '17 at 10:11

Object Mapper class use to store data in Core Data

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