Serialize nested model class

angel_serialize_generator/lib/angel_serialize_generator.dart

@@ -6,6 +6,7 @@ import 'package:analyzer/dart/element/type.dart';
 import 'package:angel_serialize/angel_serialize.dart';
 import 'package:build/build.dart';
 import 'package:code_builder/code_builder.dart';
+import 'package:recase/recase.dart';
 import 'package:source_gen/source_gen.dart' hide LibraryBuilder;
 import 'build_context.dart';
 import 'context.dart';
@@ -24,6 +25,8 @@ TypeReference convertTypeReference(DartType t) {
 }
 
 bool isModelClass(DartType t) {
+  if (t == null) return false;
+
   if (serializableTypeChecker.hasAnnotationOf(t.element))
     return true;
 

angel_serialize_generator/lib/serialize.dart

@@ -78,7 +78,8 @@ class SerializerGenerator extends GeneratorForAnnotation<Serializable> {
 
         // Serialize model classes via `XSerializer.toMap`
         else if (isModelClass(field.type)) {
-
+          var rc = new ReCase(field.type.name);
+          serializedRepresentation = '${rc.pascalCase}Serializer.toMap(${field.name})';
         }
 
         buf.write("'$alias': $serializedRepresentation");

angel_serialize_generator/test/models/author.serializer.g.dart

@@ -13,7 +13,7 @@ abstract class AuthorSerializer {
       'name': name,
       'age': age,
       'books': books,
-      'newest_book': newestBook,
+      'newest_book': BookSerializer.toMap(newestBook),
       'created_at': createdAt.toIso8601String(),
       'updated_at': updatedAt.toIso8601String()
     };