class Person: EKObjectModel {
    var name : String?
    var email: String?
    var car : Car?
    var phones: [Phone]?
}
class Car: EKObjectModel {
    var model : String?
    var year : String?
    var createdAt : NSDate?
}
class Phone: EKObjectModel {
    var DDI: String?
    var DDD: String?
    var number: String?
}

extension Person {
    override class func objectMapping() -> EKObjectMapping{
        var mapping = EKObjectMapping(objectClass: self)
        mapping.mapPropertiesFromArray(["name","email"])
        mapping.hasOne(Car.self, forKeyPath: "car")
        mapping.hasMany(Phone.self, forKeyPath: "phones")
        return mapping
    }
}
extension Car {
    override class func objectMapping() -> EKObjectMapping{
        var mapping = EKObjectMapping(objectClass: self)
        mapping.mapPropertiesFromArray(["model","year"])
        return mapping
    }
}
extension Phone {
    override class func objectMapping() -> EKObjectMapping!
    {
        var mapping = EKObjectMapping(objectClass: self)
        mapping.mapPropertiesFromArray(["number"])
        mapping.mapPropertiesFromDictionary(["ddi":"DDI","ddd":"DDD"])
        return mapping
    }
}

let person = Person(properties: personInfo)