Realm List<String> fails to map in toDictionary(), so when passed to realm create method, crashes

[akramhussein]

Using the following model, when I convert an object to an NSDictionary and insert using realm's create method, I receive a crash as seen below.

I've tried:

• Adding a skipProperty step to check count of 0 on NSArray, NSDictionary, [String].
• Tried to map the field with a propertyConverters but it never gets called

Model

import Foundation
import RealmSwift
import EVReflection

class Base: Object, EVReflectable {

    @objc dynamic var id: String = ""

    override static func primaryKey() -> String? { return "id" }
}

final class Person: Base {

    @objc dynamic var name: String = ""

    let aliases = List<String>()

    override static func primaryKey() -> String? { return "id" }

}

Error:

reason: 'Invalid value '{
}' of type '__NSDictionary0' for 'string' array property 'Person.aliases'.'
*** First throw call stack:

Seems its trying to parse an empty array, which is being stored as an empty NSDictionary.

[akramhussein]

I've checked and constructWith in extension List : EVCustomReflectable from file RealmListEVCustomReflectable.swift) is called.

[evermeer]

The error comes from the function RLMArrayValidateMatchingObjectType in RLMArray. As you can see in the error message the value is empty but it is a NSDictionary. I was able to reproduce the issue. If you have a List and to a .toDictionary() then EVReflection does not recognize it as a list of primitive types. Instead it tries to create a dictionary for every item. If you then try to create an object from that same dictionary, then you will get this error.

I will have a look if I can fix the .toDictionary() for List fields.

[evermeer]

Ah, there was a bug in the toCodableValue of RealmListEVReflectable.swift I will publish the fix now. It should be available in about an hour.

[evermeer]

It's published as version 5.5.6

[akramhussein]

Thank you so much - this fixed the issue 👍