update encode method

MVMCore/MVMCore/Models/Model/Model.swift

@@ -26,5 +26,19 @@ extension Model {
         let m = try unkeyedContainer.decodeIfPresent(self)
         return m
     }
+    
+    static public func mvmencode<K:CodingKey>(keyedContainer: inout KeyedEncodingContainer<K>, codingKey: K, model: Model) throws {
+        guard let typedModel = model as? Self else {
+            throw ModelRegistry.Error.encoderError
+        }
+        try keyedContainer.encode(typedModel, forKey: codingKey)
+    }
+    
+    static public func mvmencode(unkeyedContainer: inout UnkeyedEncodingContainer, model: Model) throws{
+        guard let typedModel = model as? Self else {
+            throw ModelRegistry.Error.encoderError
+        }
+        try unkeyedContainer.encode(typedModel)
+    }
 }
 

MVMCore/MVMCore/Models/Model/ModelRegistry.swift

@@ -127,10 +127,12 @@ extension KeyedEncodingContainer where Key: CodingKey {
     }
     
     ///need instance type as input paramaeter list
-    public mutating func encodeArray<T:Model>(_ list:[T]?, forKey key:KeyedEncodingContainer<K>.Key) throws {
+    public mutating func encodeArray(_ list:[Model]?, forKey key:KeyedEncodingContainer<K>.Key) throws {
         var unkeyedContainer = self.nestedUnkeyedContainer(forKey: key)
         try list?.forEach({ (model) in
-            try unkeyedContainer.encode(model)
+            let typeString = type(of: model).identifier
+            let type = ModelRegistry.getType(for: typeString)
+            try type?.mvmencode(unkeyedContainer: &unkeyedContainer, model: model)
         })
     }
 }