Add author full name to news response.

src/news/serializers.py

@@ -3,6 +3,11 @@ from rest_framework import serializers
 
 
 class ArticleListSerializer(serializers.ModelSerializer):
+    author_name = serializers.SerializerMethodField()
+
     class Meta:
         model = Article
         fields = serializers.ALL_FIELDS
+
+    def get_author_name(self, obj):
+        return obj.author.user.get_full_name()