Named parameters in constructor

angel_serialize_generator/lib/angel_serialize_generator.dart

@@ -52,9 +52,12 @@ class JsonModelGenerator extends GeneratorForAnnotation<Serializable> {
     return buf.toString();
   }
 
+  /// Generate an extended model class.
   void generateClass(BuildContext ctx, FileBuilder file) {
     file.body.add(new Class((clazz) {
-      clazz.name = ctx.modelClassNameRecase.pascalCase;
+      clazz
+        ..name = ctx.modelClassNameRecase.pascalCase
+        ..extend = new Reference(ctx.originalClassName);
 
       for (var field in ctx.fields) {
         clazz.fields.add(new Field((b) {
@@ -64,6 +67,23 @@ class JsonModelGenerator extends GeneratorForAnnotation<Serializable> {
             ..type = convertTypeReference(field.type);
         }));
       }
+
+      generateConstructor(ctx, clazz, file);
+    }));
+  }
+
+  /// Generate a constructor with named parameters.
+  void generateConstructor(
+      BuildContext ctx, ClassBuilder clazz, FileBuilder file) {
+    clazz.constructors.add(new Constructor((constructor) {
+      for (var field in ctx.fields) {
+        constructor.optionalParameters.add(new Parameter((b) {
+          b
+            ..name = field.name
+            ..named = true
+            ..toThis = true;
+        }));
+      }
     }));
   }
 }

angel_serialize_generator/test/models/author.g.dart

@@ -6,7 +6,16 @@ part of angel_serialize.test.models.author;
 // Generator: JsonModelGenerator
 // **************************************************************************
 
-class Author {
+class Author extends _Author {
+  Author(
+      {this.id,
+      this.name,
+      this.age,
+      this.books,
+      this.newestBook,
+      this.createdAt,
+      this.updatedAt});
+
   final String id;
 
   final String name;
@@ -22,7 +31,9 @@ class Author {
   final DateTime updatedAt;
 }
 
-class Library {
+class Library extends _Library {
+  Library({this.id, this.collection, this.createdAt, this.updatedAt});
+
   final String id;
 
   final Map<String, Book> collection;

angel_serialize_generator/test/models/book.g.dart

@@ -6,7 +6,16 @@ part of angel_serialize.test.models.book;
 // Generator: JsonModelGenerator
 // **************************************************************************
 
-class Book {
+class Book extends _Book {
+  Book(
+      {this.id,
+      this.author,
+      this.title,
+      this.description,
+      this.pageCount,
+      this.createdAt,
+      this.updatedAt});
+
   final String id;
 
   final String author;