ios - composite primary key realm/swift -

i'm new swift , realm. want make composite primary key , when i'm trying :

class dblocation : object {  dynamic var id = 0  dynamic var tourid = 0   dynamic var uuid : string  {     return "\(id)\(tourid)"  }   override static func primarykey() -> string? {     return "uuid"  } } 

i'm getting error : 'primary key property 'uuid' not exist on object 'dblocation'

anyone can me out example how create composite primary key ?

this should give answer:

class dblocation: object {     dynamic var id = 0     dynamic var tourid = 0      func setcompoundid(id: int) {         self.id = id         compoundkey = compoundkeyvalue()     }      func setcompoundtourid(tourid: int) {         self.tourid = tourid         compoundkey = compoundkeyvalue()     }      dynamic lazy var compoundkey: string = self.compoundkeyvalue()      override static func primarykey() -> string? {         return "compoundkey"     }      func compoundkeyvalue() -> string {         return "\(id)\(tourid)"     } } 

the custom setters make sure, compoundkey updated, lazy key word makes sure first time access it, derived you've set.

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