Ufdjrw

I am using a class LocalSubject.swift which i store in a RealmDB.

class LocalSubject: Object

 @objc dynamic var subjectName: String?
 private var modules: [Module] = [Module]()
 @objc dynamic var moduleArrayJSON: String? = nil

 public func addModule(module: Module)
 modules.append(module)
 

 public func setModules(modules: [Module])
 self.modules = modules
 print("LocalSubject.swift > setModules() > " + String(describing: modules.count) + " > " + String(describing: self.modules.count))
 

 public func getModules()-> [Module]
 print("LocalSubject.swift > getModules() > " + String(describing: modules.count) + " > " + String(describing: self.modules.count))
 return modules.sorted(by: $0.displayOrder! < $1.displayOrder!)
 
 

I store the class in DB by converting "modules" array to json & back.
In below function, "modules" is computed correctly with count = 3, then i set it in "maths" object of LocalSubject. Now when i try to get the "modules" from "maths", i am always getting an empty array.

 public func createModuleArrayFromJSONInSubjects()
 let modules = getModuleArrayFromJSON(moduleArrayJSON: (maths?.moduleArrayJSON)!)
 for module in modules
 print("-> " + module.title!)
 
 maths?.setModules(modules: modules)
 for module in (maths?.getModules())!
 print("---> " + module.title!)
 
 

I am unable to figure this out, it seems weird.
Am i missing something?

Realm objects do not support array types, instead you should use the Realm type List to maintain references to other Realm objects. If Module is not a Realm object subclass, you can't store a reference to it. See here: https://realm.io/docs/swift/latest/#models

So there are two options:

1. Either change the modules property to be a List and maintain the Module objects in Realm too, or


2. Do you need to store the modules property if you are storing the JSON? You could continue to store the JSON string only, and make modules a computed property (for which you'd need a getter, and you can choose whether to make a setter or not).

You'll have to choose the way forward depending on your use cases.