Type does not conform to protocol 'DefaultsSerializable'

[CoderMaurice]

class NotificationMessage: Codable, DefaultsSerializable {
    var type: MessageType = .normal
}

//  Error: Type 'MessageType' does not conform to protocol 'DefaultsSerializable'
enum MessageType: Int, Codable, DefaultsSerializable {
    case normal   = 1
    case activity    = 2 
}

why i get this error?

[sunshinejr]

Hey @CoderMaurice - this is a very good question. So how does SwiftyUserDefaults work is that it synthesizes the bridges needed to fetch/store objects (most of the time). So we synthesize these bridges for both Codable and RawRepresentable protocols. Unfortunately, when you have both of these the compiler is confused and don't know which synthesized bridges do you want for the object - the ones for RawRepresentable or for Codable.

The difference between these is how the object is stored underneath, in a plist. Depending on your preference, you should use the following:

enum MessageType: Int, Codable, DefaultsSerializable {
    case normal   = 1
    case activity    = 2 

    public static var _defaults: DefaultsBridge<MessageType> { return __YOUR_BRIDGE__ }
    public static var _defaultsArray: DefaultsBridge<[MessageType]> { return __YOUR_ARRAY_BRIDGE__ }

where:

• __YOUR_BRIDGE__ could be DefaultsCodableBridge()/DefaultsRawRepresentableBridge()
• __YOUR_ARRAY_BRIDGE__ could be DefaultsCodableBridge()/DefaultsRawRepresentableArrayBridge()

Let me know if it helped!

[CoderMaurice]

Thanks very much for your reply, now it works as expected.

[sunshinejr]

Awesome, glad it helped! 🚀

[mortenholmgaard]

This is how the code looks in using the latest version: (it took me a while to figure out)

public static var _defaults: DefaultsRawRepresentableBridge< MessageType> { DefaultsRawRepresentableBridge< MessageType>() }
public static var _defaultsArray: DefaultsRawRepresentableArrayBridge<[MessageType]> { DefaultsRawRepresentableArrayBridge<[MessageType]>() }

[antonyjamese]

This is how the code looks in using the latest version: (it took me a while to figure out)

public static var _defaults: DefaultsRawRepresentableBridge< MessageType> { DefaultsRawRepresentableBridge< MessageType>() }
public static var _defaultsArray: DefaultsRawRepresentableArrayBridge<[MessageType]> { DefaultsRawRepresentableArrayBridge<[MessageType]>() }

@mortenholmgaard let's say MessageType we are going to use is an optional one, can you also please share how to represent the optional data?

[mortenholmgaard]

@antonyjamese It does not solve the problem for us with the latest version of xCode - I think the problem you/we are experiencing now is related to: https://github.com/sunshinejr/SwiftyUserDefaults/issues/288