fix(dynamite): add serializers of parameter types

packages/dynamite/dynamite/lib/src/openapi_builder.dart

@@ -721,9 +721,10 @@ class OpenAPIBuilder implements Builder {
           ],
           '])',
           r'final Serializers _serializers = (_$_serializers.toBuilder()',
-          for (final type in state.resolvedTypeCombinations) ...[
-            ...type.builderFactories,
-          ],
+          ...state.resolvedTypeCombinations
+              .map((final type) => type.serializers)
+              .expand((final element) => element)
+              .toSet(),
           ').build();',
           '',
           'Serializers get ${variablePrefix}Serializers => _serializers;',

packages/dynamite/dynamite/lib/src/type_result/base.dart

@@ -10,6 +10,9 @@ class TypeResultBase extends TypeResult {
   @override
   String? get _builderFactory => null;
 
+  @override
+  String? get _serializer => null;
+
   @override
   String serialize(final String object) => object;
 

packages/dynamite/dynamite/lib/src/type_result/enum.dart

@@ -13,6 +13,9 @@ class TypeResultEnum extends TypeResult {
   @override
   String? get _builderFactory => null;
 
+  @override
+  String? get _serializer => '..add($className.serializer)';
+
   @override
   String encode(
     final String object, {

packages/dynamite/dynamite/lib/src/type_result/list.dart

@@ -13,6 +13,9 @@ class TypeResultList extends TypeResult {
   @override
   String? get _builderFactory => '..addBuilderFactory($fullType, ListBuilder<${subType.className}>.new)';
 
+  @override
+  String? get _serializer => null;
+
   @override
   String encode(
     final String object, {

packages/dynamite/dynamite/lib/src/type_result/map.dart

@@ -13,6 +13,9 @@ class TypeResultMap extends TypeResult {
   @override
   String? get _builderFactory => '..addBuilderFactory($fullType, MapBuilder<String, ${subType.className}>.new)';
 
+  @override
+  String? get _serializer => null;
+
   @override
   TypeResultMap get dartType => TypeResultMap('Map', subType, nullable: nullable);
 

packages/dynamite/dynamite/lib/src/type_result/object.dart

@@ -16,6 +16,9 @@ class TypeResultObject extends TypeResult {
   @override
   String? get _builderFactory => '..addBuilderFactory($fullType, $name.new)';
 
+  @override
+  String? get _serializer => '..add($className.serializer)';
+
   @override
   String encode(
     final String object, {

packages/dynamite/dynamite/lib/src/type_result/type_result.dart

@@ -43,14 +43,20 @@ abstract class TypeResult {
     return 'FullType($className)';
   }
 
-  List<String> get builderFactories => [
-        for (final class_ in generics) ...[
-          ...class_.builderFactories,
-        ],
-        if (_builderFactory != null) ...[
-          _builderFactory!,
-        ],
-      ];
+  Iterable<String> get serializers sync* {
+    for (final class_ in generics) {
+      yield* class_.serializers;
+    }
+
+    if (_builderFactory != null) {
+      yield _builderFactory!;
+    }
+    if (_serializer != null) {
+      yield _serializer!;
+    }
+  }
+
+  String? get _serializer;
 
   String? get _builderFactory;