Mapping Realm objects to a Dict via Swift map - swift

Question

I have two (Realm.io) objects like this:
class Parent: Object {
var title = “”
var children = List<Child>()
var dict: [String: Any] {
print(“Dict 1”)
return ([“title”: self.title, “children”: self.children.map{ $0.dict }])
}
}
class Child: Object {
var name = “”
var dict: [String: Any] {
print(“Dict 2”)
return ([“name”: self.name])
}
}
I’m trying to convert them both to a dictionary in one swoop like this:
let parent_dict = parent.dict
It works fine for “title” and other such Parent attributes, but never actually goes to map the Child class object.
The output for the above example would be just: Dict 1

Answer 1

Be sure you add all the objects to the realm first. The following code works (try it in a playground inside your project):
import RealmSwift
class Parent: Object {
dynamic var title = ""
var children = List<Child>()
var dict: [String: Any] {
print("Dict 1")
return (["title": self.title, "children": self.children.map{ $0.dict }])
}
}
class Child: Object {
dynamic var name = ""
var dict: [String: Any] {
print("Dict 2")
return (["name": self.name])
}
}
let p1 = Parent(); p1.title = "John"
let c1 = Child(); c1.name = "Pam"
let c2 = Child(); c2.name = "Andrew"
let c3 = Child(); c3.name = "Barrack"
let realm = try! Realm()
try! realm.write {
realm.add(p1)
realm.add([c1, c2, c3])
p1.children.append(objectsIn: [c1, c2, c3])
}
print(p1.dict)
After running the code the console will read:
Dict 1
["title": "John", "children": Swift.LazyMapRandomAccessCollection<RealmSwift.List<Child>, Swift.Dictionary<Swift.String, Any>>(_base: List<Child> (
[0] Child {
name = Pam;
},
[1] Child {
name = Andrew;
},
[2] Child {
name = Barrack;
}
), _transform: (Function))]